Merge branch 'sstp-rewrite' of github.com:c-po/vyos-1x into current

* 'sstp-rewrite' of github.com:c-po/vyos-1x:
  sstp: T2008: migrate SSL certificate nodes
  sstp: T2006: fix valueHelp and validators for numeric values
  sstp: T2008: remove req-limit config node
  sstp: T2110: use uniform RADIUS CLI syntax
  sstp: T2008: adjust config syntax to common style
  ntp: only import deepcopy from copy
  sstp: T2008: use pep8 formatting
  sstp: T2008: dns: unwind configuration
  sstp: T2008: move to vpn node
  sstp: T2007: fix MTU boundaries

6 files changed, 783 insertions, 587 deletions

diff --git a/interface-definitions/include/interface-mtu-68-1500.xml.i b/interface-definitions/include/interface-mtu-68-1500.xml.i
new file mode 100644
index 000000000..81223c332
--- /dev/null
+++ b/interface-definitions/include/interface-mtu-68-1500.xml.i
@@ -0,0 +1,13 @@
+<leafNode name="mtu">
+  <properties>
+    <help>Maximum Transmission Unit (MTU)</help>
+    <valueHelp>
+      <format>68-1500</format>
+      <description>Maximum Transmission Unit</description>
+    </valueHelp>
+    <constraint>
+      <validator name="numeric" argument="--range 68-1500"/>
+    </constraint>
+    <constraintErrorMessage>MTU must be between 68 and 1500</constraintErrorMessage>
+  </properties>
+</leafNode>
diff --git a/interface-definitions/sstp.xml.in b/interface-definitions/vpn-sstp.xml.in
index 10b97b833..59aae9f7f 100644
--- a/interface-definitions/sstp.xml.in
+++ b/interface-definitions/vpn-sstp.xml.in
@@ -1,11 +1,11 @@
 <?xml version="1.0"?>
 <interfaceDefinition>
-  <node name="service">
+  <node name="vpn">
     <children>
-      <node name="sstp-server" owner="${vyos_conf_scripts_dir}/accel_sstp.py">
+      <node name="sstp" owner="${vyos_conf_scripts_dir}/vpn_sstp.py">
         <properties>
-          <help>Secure Socket Tunneling Protocol (SSTP) Server</help>
-          <priority>900</priority>
+          <help>Secure Socket Tunneling Protocol (SSTP) server</help>
+          <priority>901</priority>
         </properties>
         <children>
           <node name="authentication">
@@ -113,85 +113,96 @@
                     <multi />
                 </properties>
               </leafNode>
-              <tagNode name="radius-server">
-                <properties>
-                  <help>IP address of RADIUS server</help>
-                  <valueHelp>
-                    <format>ipv4</format>
-                      <description>IP address of RADIUS server</description>
-                  </valueHelp>
-                </properties>
-                <children>
-                  <leafNode name="secret">
-                    <properties>
-                      <help>Key for accessing the specified server</help>
-                    </properties>
-                  </leafNode>
-                  <leafNode name="req-limit">
-                    <properties>
-                      <help>Maximum number of simultaneous requests to server (default: unlimited)</help>
-                    </properties>
-                  </leafNode>
-                  <leafNode name="fail-time">
-                    <properties>
-                      <help>If server does not responds mark it as unavailable for this time (seconds)</help>
-                    </properties>
-                  </leafNode>
-                </children>
-              </tagNode>
-              <node name="radius-settings">
-                <properties>
-                  <help>RADIUS settings</help>
-                </properties>
+              #include <include/radius-server.xml.i>
+              <node name="radius">
                 <children>
+                  <tagNode name="server">
+                    <children>
+                      <leafNode name="fail-time">
+                        <properties>
+                          <help>Mark server unavailable for &lt;n&gt; seconds on failure</help>
+                          <valueHelp>
+                            <format>0-600</format>
+                            <description>Fail time penalty</description>
+                          </valueHelp>
+                          <constraint>
+                            <validator name="numeric" argument="--range 0-600"/>
+                          </constraint>
+                          <constraintErrorMessage>Fail time must be between 0 and 600 seconds</constraintErrorMessage>
+                        </properties>
+                      </leafNode>
+                    </children>
+                  </tagNode>
                   <leafNode name="timeout">
                     <properties>
-                      <help>Timeout to wait response from server (seconds)</help>
+                      <help>Timeout in seconds to wait response from RADIUS server</help>
+                      <valueHelp>
+                        <format>1-60</format>
+                        <description>Timeout in seconds</description>
+                      </valueHelp>
+                      <constraint>
+                        <validator name="numeric" argument="--range 1-60"/>
+                      </constraint>
+                      <constraintErrorMessage>Timeout must be between 1 and 60 seconds</constraintErrorMessage>
                     </properties>
                   </leafNode>
                   <leafNode name="acct-timeout">
                     <properties>
-                      <help>Timeout to wait reply for Interim-Update packets. (default 3 seconds)</help>
+                      <help>Timeout for Interim-Update packets, terminate session afterwards (default 3 seconds)</help>
+                      <valueHelp>
+                        <format>0-60</format>
+                        <description>Timeout in seconds, 0 to keep active</description>
+                      </valueHelp>
+                      <constraint>
+                        <validator name="numeric" argument="--range 0-60"/>
+                      </constraint>
+                      <constraintErrorMessage>Timeout must be between 0 and 60 seconds</constraintErrorMessage>
                     </properties>
                   </leafNode>
                   <leafNode name="max-try">
                     <properties>
-                      <help>Maximum number of tries to send Access-Request/Accounting-Request queries</help>
+                      <help>Number of tries to send Access-Request/Accounting-Request queries</help>
+                      <valueHelp>
+                        <format>1-20</format>
+                        <description>Maximum tries</description>
+                      </valueHelp>
+                      <constraint>
+                        <validator name="numeric" argument="--range 1-20"/>
+                      </constraint>
+                      <constraintErrorMessage>Maximum tries must be between 1 and 20</constraintErrorMessage>
                     </properties>
                   </leafNode>
                   <leafNode name="nas-identifier">
                     <properties>
-                      <help>Value to send to RADIUS server in NAS-Identifier attribute and to be matched in DM/CoA requests.</help>
+                      <help>NAS-Identifier attribute sent to RADIUS</help>
                     </properties>
                   </leafNode>
                   <leafNode name="nas-ip-address">
                     <properties>
-                      <help>Value to send to RADIUS server in NAS-IP-Address attribute and to be matched in DM/CoA requests. Also DM/CoA server will bind to that address.</help>
+                      <help>NAS-IP-Address attribute sent to RADIUS</help>
                        <constraint>
                         <validator name="ipv4-address"/>
                       </constraint>
-                      <constraintErrorMessage>invalid IPv4 address</constraintErrorMessage>
                       <valueHelp>
                         <format>ipv4</format>
-                        <description>NAS-IP-Address Attribute Value</description>
+                        <description>NAS-IP-Address attribute</description>
                       </valueHelp>
-                    </properties>
-                  </leafNode>
-                  <node name="dae-server">
+                     </properties>
+                   </leafNode>
+                  <node name="dynamic-author">
                     <properties>
-                      <help>IPv4 address and port to bind Dynamic Authorization Extension server (DM/CoA)</help>
+                      <help>Dynamic Authorization Extension/Change of Authorization server</help>
                     </properties>
                     <children>
-                      <leafNode name="ip-address">
+                      <leafNode name="server">
                         <properties>
                           <help>IP address for Dynamic Authorization Extension server (DM/CoA)</help>
                           <constraint>
                             <validator name="ipv4-address"/>
                           </constraint>
-                          <constraintErrorMessage>invalid IPv4 address</constraintErrorMessage>
                           <valueHelp>
                             <format>ipv4</format>
-                            <description>Specifies IP address for Dynamic Authorization Extension server (DM/CoA)</description>
+                            <description>IPv4 address for aynamic authorization server</description>
                           </valueHelp>
                         </properties>
                       </leafNode>
@@ -207,9 +218,9 @@
                           </constraint>
                         </properties>
                       </leafNode>
-                      <leafNode name="secret">
+                      <leafNode name="key">
                         <properties>
-                          <help>Secret for Dynamic Authorization Extension server (DM/CoA)</help>
+                          <help>Shared secret for Dynamic Authorization Extension server</help>
                         </properties>
                       </leafNode>
                     </children>
@@ -221,17 +232,17 @@
                     <children>
                       <leafNode name="attribute">
                         <properties>
-                          <help>Specifies which radius attribute contains rate information. (default is Filter-Id)</help>
+                          <help>Specifies RADIUS attribute containing rate information (default 'Filter-Id')</help>
                         </properties>
                       </leafNode>
                       <leafNode name="vendor">
                         <properties>
-                          <help>Specifies the vendor dictionary. (dictionary needs to be in /usr/share/accel-ppp/radius)</help>
+                          <help>Specifies vendor dictionary (needs to be in /usr/share/accel-ppp/radius)</help>
                         </properties>
                       </leafNode>
                       <leafNode name="enable">
                         <properties>
-                          <help>Enables Bandwidth shaping via RADIUS</help>
+                          <help>Enable RADIUS bandwidth shaping</help>
                           <valueless />
                         </properties>
                       </leafNode>
@@ -241,42 +252,35 @@
               </node>
             </children>
           </node>
-          <node name="sstp-settings">
+          <node name="ssl">
             <properties>
-              <help>SSTP settings</help>
+              <help>SSL Certificate, SSL Key and CA (/config/user-data/sstp)</help>
             </properties>
             <children>
-              <node name="ssl-certs">
+              <leafNode name="ca-cert-file">
                 <properties>
-                  <help>SSL Certificate, SSL Key and CA (/config/user-data/sstp)</help>
+                  <help>Certificate Authority certificate</help>
+                  <completionHelp>
+                    <script>if [ -e /config/user-data/sstp ]; then ls /config/user-data/sstp; fi</script>
+                  </completionHelp>
                 </properties>
-                <children>
-                  <leafNode name="ca">
-                    <properties>
-                      <help>Certificate Authority certificate</help>
-                      <completionHelp>
-                        <script>if [ -e /config/user-data/sstp ]; then ls /config/user-data/sstp; fi</script>
-                      </completionHelp>
-                    </properties>
-                  </leafNode>
-                  <leafNode name="server-cert">
-                    <properties>
-                      <help>Server Certificate</help>
-                      <completionHelp>
-                        <script>if [ -e /config/user-data/sstp ]; then ls /config/user-data/sstp; fi</script>
-                      </completionHelp>
-                    </properties>
-                  </leafNode>
-                  <leafNode name="server-key">
-                    <properties>
-                      <help>Privat Key of the Server Certificate</help>
-                      <completionHelp>
-                        <script>if [ -e /config/user-data/sstp ]; then ls /config/user-data/sstp; fi</script>
-                      </completionHelp>
-                    </properties>
-                  </leafNode>
-                </children>
-              </node>
+              </leafNode>
+              <leafNode name="cert-file">
+                <properties>
+                  <help>Server Certificate</help>
+                  <completionHelp>
+                    <script>if [ -e /config/user-data/sstp ]; then ls /config/user-data/sstp; fi</script>
+                  </completionHelp>
+                </properties>
+              </leafNode>
+              <leafNode name="key-file">
+                <properties>
+                  <help>Privat Key of the Server Certificate</help>
+                  <completionHelp>
+                    <script>if [ -e /config/user-data/sstp ]; then ls /config/user-data/sstp; fi</script>
+                  </completionHelp>
+                </properties>
+              </leafNode>
             </children>
           </node>
           <node name="network-settings">
@@ -318,14 +322,9 @@
                   </leafNode>
                 </children>
               </node>
-              <node name="dns-server">
+              <leafNode name="name-server">
                 <properties>
                   <help>DNS servers propagated to clients</help>
-                </properties>
-                <children>
-                  <leafNode name="primary-dns">
-                    <properties>
-                      <help>Primary DNS Server</help>
                       <valueHelp>
                         <format>ipv4</format>
                         <description>IPv4 address</description>
@@ -333,30 +332,10 @@
                       <constraint>
                         <validator name="ipv4-address"/>
                       </constraint>
-                    </properties>
-                  </leafNode>
-                  <leafNode name="secondary-dns">
-                    <properties>
-                      <help>Secondary DNS Server</help>
-                      <valueHelp>
-                        <format>ipv4</format>
-                        <description>IPv4 address</description>
-                      </valueHelp>
-                      <constraint>
-                        <validator name="ipv4-address"/>
-                      </constraint>
-                    </properties>
-                  </leafNode>
-                </children>
-              </node>
-              <leafNode name="mtu">
-                <properties>
-                  <help>Maximum Transmission Unit (MTU)</help>
-                  <constraint>
-                    <validator name="numeric" argument="--range 128-16384"/>
-                  </constraint>
+                      <multi/>
                 </properties>
               </leafNode>
+              #include <include/interface-mtu-68-1500.xml.i>
             </children>
           </node>
           <node name="ppp-settings">
diff --git a/src/conf_mode/accel_sstp.py b/src/conf_mode/accel_sstp.py
deleted file mode 100755
index 1317a32db..000000000
--- a/src/conf_mode/accel_sstp.py
+++ /dev/null
@@ -1,469 +0,0 @@
-#!/usr/bin/env python3
-#
-# Copyright (C) 2018 VyOS maintainers and contributors
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 or later as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-#
-
-import sys
-import os
-import re
-import subprocess
-import jinja2
-import socket
-import time
-import syslog as sl
-
-from vyos.config import Config
-from vyos import ConfigError
-
-pidfile = r'/var/run/accel_sstp.pid'
-sstp_cnf_dir = r'/etc/accel-ppp/sstp'
-chap_secrets = sstp_cnf_dir + '/chap-secrets'
-sstp_conf = sstp_cnf_dir + '/sstp.config'
-ssl_cert_dir = r'/config/user-data/sstp'
-
-### config path creation
-if not os.path.exists(sstp_cnf_dir):
-  os.makedirs(sstp_cnf_dir)
-  sl.syslog(sl.LOG_NOTICE, sstp_cnf_dir  + " created")
-
-if not os.path.exists(ssl_cert_dir):
-  os.makedirs(ssl_cert_dir)
-  sl.syslog(sl.LOG_NOTICE, ssl_cert_dir  + " created")
-
-sstp_config = '''
-### generated by accel_sstp.py ### 
-[modules]
-log_syslog
-sstp
-ippool
-shaper
-{% if authentication['mode'] == 'local' %}
-chap-secrets
-{% endif -%}
-{% for proto in authentication['auth_proto'] %}
-{{proto}}
-{% endfor %}
-{% if authentication['mode'] == 'radius' %}
-radius
-{% endif %}
-
-[core]
-thread-count={{thread_cnt}}
-
-[common]
-single-session=replace
-
-[log]
-syslog=accel-sstp,daemon
-copy=1
-level=5
-
-[client-ip-range]
-disable
-
-[sstp]
-verbose=1
-accept=ssl
-{% if certs %}
-ssl-ca-file=/config/user-data/sstp/{{certs['ca']}}
-ssl-pemfile=/config/user-data/sstp/{{certs['server-cert']}}
-ssl-keyfile=/config/user-data/sstp/{{certs['server-key']}}
-{% endif %}
-
-{%if ip_pool %}
-[ip-pool]
-gw-ip-address={{gw}}
-{% for sn in ip_pool %}
-{{sn}}
-{% endfor %}
-{% endif %}
-
-{% if dnsv4 %}
-[dns]
-{% if dnsv4['primary'] %}
-dns1={{dnsv4['primary']}}
-{% endif -%}
-{% if dnsv4['secondary'] %}
-dns2={{dnsv4['secondary']}}
-{% endif -%}
-{% endif %}
-
-{% if authentication['mode'] == 'local' %}
-[chap-secrets]
-chap-secrets=/etc/accel-ppp/sstp/chap-secrets
-{% endif %}
-
-{%- if authentication['mode'] == 'radius' %}
-[radius]
-verbose=1
-{% for rsrv in authentication['radius-srv']: %}
-server={{rsrv}},{{authentication['radius-srv'][rsrv]['secret']}},\
-req-limit={{authentication['radius-srv'][rsrv]['req-limit']}},\
-fail-time={{authentication['radius-srv'][rsrv]['fail-time']}}
-{% endfor -%}
-{% if authentication['radiusopt']['acct-timeout'] %}
-acct-timeout={{authentication['radiusopt']['acct-timeout']}}
-{% endif -%}
-{% if authentication['radiusopt']['timeout'] %}
-timeout={{authentication['radiusopt']['timeout']}}
-{% endif -%}
-{% if authentication['radiusopt']['max-try'] %}
-max-try={{authentication['radiusopt']['max-try']}}
-{% endif -%}
-{% if authentication['radiusopt']['nas-id'] %}
-nas-identifier={{authentication['radiusopt']['nas-id']}}
-{% endif -%}
-{% if authentication['radiusopt']['nas-ip'] %}
-nas-ip-address={{authentication['radiusopt']['nas-ip']}}
-{% endif -%}
-{% if authentication['radiusopt']['dae-srv'] %}
-dae-server={{authentication['radiusopt']['dae-srv']['ip-addr']}}:\
-{{authentication['radiusopt']['dae-srv']['port']}},\
-{{authentication['radiusopt']['dae-srv']['secret']}}
-{% endif -%}
-{% endif %}
-
-[ppp]
-verbose=1
-check-ip=1
-{% if mtu %}
-mtu={{mtu}}
-{% endif -%}
-{% if ppp['mppe'] %}
-mppe={{ppp['mppe']}}
-{% endif -%}
-{% if ppp['lcp-echo-interval'] %}
-lcp-echo-interval={{ppp['lcp-echo-interval']}}
-{% endif -%}
-{% if ppp['lcp-echo-failure'] %}
-lcp-echo-failure={{ppp['lcp-echo-failure']}}
-{% endif -%}
-{% if ppp['lcp-echo-timeout'] %}
-lcp-echo-timeout={{ppp['lcp-echo-timeout']}}
-{% endif %}
-
-{% if authentication['radiusopt']['shaper'] %}
-[shaper]
-verbose=1
-attr={{authentication['radiusopt']['shaper']['attr']}}
-{% if authentication['radiusopt']['shaper']['vendor'] %}
-vendor={{authentication['radiusopt']['shaper']['vendor']}}
-{% endif -%}
-{% endif %}
-
-[cli]
-tcp=127.0.0.1:2005
-'''
-
-### sstp chap secrets
-chap_secrets_conf = '''
-# username  server  password  acceptable local IP addresses   shaper
-{% for user in authentication['local-users'] %}
-{% if authentication['local-users'][user]['state'] == 'enabled' %}
-{% if (authentication['local-users'][user]['upload']) and (authentication['local-users'][user]['download']) %}
-{{user}}\t*\t{{authentication['local-users'][user]['passwd']}}\t{{authentication['local-users'][user]['ip']}}\t\
-{{authentication['local-users'][user]['download']}}/{{authentication['local-users'][user]['upload']}}
-{% else %}
-{{user}}\t*\t{{authentication['local-users'][user]['passwd']}}\t{{authentication['local-users'][user]['ip']}}
-{% endif %}
-{% endif %}
-{% endfor %}
-'''
-###
-# inline helper functions
-###
-# depending on hw and threads, daemon needs a little to start
-# if it takes longer than 100 * 0.5 secs, exception is being raised
-# not sure if that's the best way to check it, but it worked so far quite well 
-###
-def chk_con():
-  cnt = 0
-  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-  while True:
-    try:
-      s.connect(("127.0.0.1", 2005))
-      s.close()
-      break
-    except ConnectionRefusedError:
-      time.sleep(0.5)
-      cnt +=1
-      if cnt == 100:
-        raise("failed to start sstp server")
-        break
-
-### chap_secrets file if auth mode local
-def write_chap_secrets(c):
-  tmpl = jinja2.Template(chap_secrets_conf, trim_blocks=True)
-  chap_secrets_txt = tmpl.render(c)
-  old_umask = os.umask(0o077)
-  open(chap_secrets,'w').write(chap_secrets_txt)
-  os.umask(old_umask)
-  sl.syslog(sl.LOG_NOTICE, chap_secrets + ' written')
-
-def accel_cmd(cmd=''):
-  if not cmd:
-    return None
-  try:
-    ret = subprocess.check_output(['/usr/bin/accel-cmd','-p','2005',cmd]).decode().strip()
-    return ret
-  except:
-    return 1
-
-#### check ig local-ip is in client pool subnet
-
-
-### 
-# inline helper functions end
-###
-
-def get_config():
-  c = Config()
-  if not c.exists('service sstp-server'):
-    return None
-
-  c.set_level('service sstp-server')
-
-  config_data = {
-    'authentication'    : {
-      'local-users'     : {
-      },
-      'mode'            : 'local',
-      'auth_proto'      : [],
-      'radius-srv'      : {},
-      'radiusopt'       : {},
-      'dae-srv'         : {}
-    },
-    'certs'           : {
-      'ca'            : None,
-      'server-key'    : None,
-      'server-cert'   : None
-    },
-    'ip_pool'         : [],
-    'gw'              : None,
-    'dnsv4'           : {},
-    'mtu'             : None,
-    'ppp'             : {},
-  }
-
-  ### local auth
-  if c.exists('authentication mode local'):
-    if c.exists('authentication local-users'):
-      for usr in c.list_nodes('authentication local-users username'):
-        config_data['authentication']['local-users'].update(
-          {
-            usr : {
-              'passwd'    : None,
-              'state'     : 'enabled',
-              'ip'        : '*',
-              'upload'    : None,
-              'download'  : None
-            }
-          }
-        )
-        if c.exists('authentication local-users username ' + usr + ' password'):
-          config_data['authentication']['local-users'][usr]['passwd'] = c.return_value('authentication local-users username ' + usr + ' password')
-        if c.exists('authentication local-users username ' + usr + ' disable'):
-          config_data['authentication']['local-users'][usr]['state'] = 'disable'
-        if c.exists('authentication local-users username ' + usr + ' static-ip'):
-          config_data['authentication']['local-users'][usr]['ip'] = c.return_value('authentication local-users username ' + usr + ' static-ip')
-        if c.exists('authentication local-users username ' + usr + ' rate-limit download'):
-          config_data['authentication']['local-users'][usr]['download'] = c.return_value('authentication local-users username ' + usr + ' rate-limit download')
-        if c.exists('authentication local-users username ' + usr + ' rate-limit upload'):
-          config_data['authentication']['local-users'][usr]['upload'] = c.return_value('authentication local-users username ' + usr + ' rate-limit upload')
-
-  if c.exists('authentication protocols'):
-    auth_mods = {'pap' : 'pap','chap' : 'auth_chap_md5', 'mschap' : 'auth_mschap_v1', 'mschap-v2' : 'auth_mschap_v2'}
-    for proto in c.return_values('authentication protocols'):
-      config_data['authentication']['auth_proto'].append(auth_mods[proto])
-  else:
-    config_data['authentication']['auth_proto'] = ['auth_mschap_v2']
-
-  #### RADIUS auth and settings
-  if c.exists('authentication mode radius'):
-    config_data['authentication']['mode'] = c.return_value('authentication mode')
-    if c.exists('authentication radius-server'):
-      for rsrv in c.list_nodes('authentication radius-server'):
-        config_data['authentication']['radius-srv'][rsrv] = {}
-        if c.exists('authentication radius-server ' + rsrv + ' secret'):
-          config_data['authentication']['radius-srv'][rsrv]['secret'] = c.return_value('authentication radius-server ' + rsrv + ' secret')
-        else:
-          config_data['authentication']['radius-srv'][rsrv]['secret'] = None
-        if c.exists('authentication radius-server ' + rsrv + ' fail-time'):
-          config_data['authentication']['radius-srv'][rsrv]['fail-time'] = c.return_value('authentication radius-server ' + rsrv + ' fail-time')
-        else:
-          config_data['authentication']['radius-srv'][rsrv]['fail-time'] = 0
-        if c.exists('authentication radius-server ' + rsrv + ' req-limit'):
-          config_data['authentication']['radius-srv'][rsrv]['req-limit'] = c.return_value('authentication radius-server ' + rsrv + ' req-limit')
-        else:
-          config_data['authentication']['radius-srv'][rsrv]['req-limit'] = 0
-
-    #### advanced radius-setting
-    if c.exists('authentication radius-settings'):
-      if c.exists('authentication radius-settings acct-timeout'):
-        config_data['authentication']['radiusopt']['acct-timeout'] = c.return_value('authentication radius-settings acct-timeout')
-      if c.exists('authentication radius-settings max-try'):
-        config_data['authentication']['radiusopt']['max-try'] = c.return_value('authentication radius-settings max-try')
-      if c.exists('authentication radius-settings timeout'):
-        config_data['authentication']['radiusopt']['timeout'] = c.return_value('authentication radius-settings timeout')
-      if c.exists('authentication radius-settings nas-identifier'):
-        config_data['authentication']['radiusopt']['nas-id'] = c.return_value('authentication radius-settings nas-identifier')
-      if c.exists('authentication radius-settings nas-ip-address'):
-        config_data['authentication']['radiusopt']['nas-ip'] = c.return_value('authentication radius-settings nas-ip-address')
-      if c.exists('authentication radius-settings dae-server'):
-        config_data['authentication']['radiusopt'].update(
-          {
-            'dae-srv' : {
-              'ip-addr' : c.return_value('authentication radius-settings dae-server ip-address'),
-              'port'    : c.return_value('authentication radius-settings dae-server port'),
-              'secret'  : str(c.return_value('authentication radius-settings dae-server secret'))
-            }
-          }
-        )
-      if c.exists('authentication radius-settings rate-limit enable'): 
-        if not c.exists('authentication radius-settings rate-limit attribute'):
-          config_data['authentication']['radiusopt']['shaper'] = { 'attr'  : 'Filter-Id' }
-        else:
-          config_data['authentication']['radiusopt']['shaper'] = {
-            'attr'  : c.return_value('authentication radius-settings rate-limit attribute')
-          }
-        if c.exists('authentication radius-settings rate-limit vendor'):
-          config_data['authentication']['radiusopt']['shaper']['vendor'] = c.return_value('authentication radius-settings rate-limit vendor')
-
-  if c.exists('sstp-settings ssl-certs ca'):
-    config_data['certs']['ca'] = c.return_value('sstp-settings ssl-certs ca')
-  if c.exists('sstp-settings ssl-certs server-cert'):
-    config_data['certs']['server-cert'] = c.return_value('sstp-settings ssl-certs server-cert')
-  if c.exists('sstp-settings ssl-certs server-key'):
-    config_data['certs']['server-key'] = c.return_value('sstp-settings ssl-certs server-key')
-
-  if c.exists('network-settings client-ip-settings subnet'):
-    config_data['ip_pool'] = c.return_values('network-settings client-ip-settings subnet')
-  if c.exists('network-settings client-ip-settings gateway-address'):
-    config_data['gw'] = c.return_value('network-settings client-ip-settings gateway-address')
-  if c.exists('network-settings dns-server primary-dns'):
-    config_data['dnsv4']['primary'] = c.return_value('network-settings dns-server primary-dns')
-  if c.exists('network-settings dns-server secondary-dns'):
-    config_data['dnsv4']['secondary'] = c.return_value('network-settings dns-server secondary-dns')
-  if c.exists('network-settings mtu'):
-    config_data['mtu'] = c.return_value('network-settings mtu')
-
-  #### ppp
-  if c.exists('ppp-settings mppe'):
-    config_data['ppp']['mppe'] = c.return_value('ppp-settings mppe')
-  if c.exists('ppp-settings lcp-echo-failure'):
-    config_data['ppp']['lcp-echo-failure'] = c.return_value('ppp-settings lcp-echo-failure')
-  if c.exists('ppp-settings lcp-echo-interval'):
-    config_data['ppp']['lcp-echo-interval'] = c.return_value('ppp-settings lcp-echo-interval')
-  if c.exists('ppp-settings lcp-echo-timeout'):
-    config_data['ppp']['lcp-echo-timeout'] = c.return_value('ppp-settings lcp-echo-timeout')
-
-  return config_data
-
-def verify(c):
-  if c == None:
-    return None
-  ### vertify auth settings
-  if c['authentication']['mode'] == 'local':
-    if not c['authentication']['local-users']:
-      raise ConfigError('sstp-server authentication local-users required')
-
-    for usr in c['authentication']['local-users']:
-      if not c['authentication']['local-users'][usr]['passwd']:
-        raise ConfigError('user ' + usr + ' requires a password')
-      ### if up/download is set, check that both have a value
-      if c['authentication']['local-users'][usr]['upload']:
-        if not c['authentication']['local-users'][usr]['download']:
-          raise ConfigError('user ' + usr + ' requires download speed value')
-      if c['authentication']['local-users'][usr]['download']:
-        if not c['authentication']['local-users'][usr]['upload']:
-          raise ConfigError('user ' + usr + ' requires upload speed value')
-
-  if not c['certs']['ca'] or not c['certs']['server-key'] or not c['certs']['server-cert']:
-    raise ConfigError('service sstp-server sstp-settings ssl-certs needs the ssl certificates set up')
-  else:
-    ssl_path = ssl_cert_dir + '/'
-    if not os.path.exists(ssl_path + c['certs']['ca']):
-      raise ConfigError('CA {0} doesn\'t exist'.format(ssl_path + c['certs']['ca']))
-    if not os.path.exists(ssl_path + c['certs']['server-cert']):
-      raise ConfigError('SSL Cert {0} doesn\'t exist'.format(ssl_path + c['certs']['server-cert']))
-    if not os.path.exists(ssl_path + c['certs']['server-cert']):
-      raise ConfigError('SSL Key {0} doesn\'t exist'.format(ssl_path + c['certs']['server-key']))
-
-  if c['authentication']['mode'] == 'radius':
-    if len(c['authentication']['radius-srv']) == 0:
-      raise ConfigError('service sstp-server authentication radius-server needs a value')
-    for rsrv in c['authentication']['radius-srv']:
-      if c['authentication']['radius-srv'][rsrv]['secret'] == None:
-        raise ConfigError('service sstp-server authentication radius-server {0} secret requires a value'.format(rsrv))
-
-  if c['authentication']['mode'] == 'local':
-    if not c['ip_pool']:
-      print ("WARNING: service sstp-server network-settings client-ip-settings subnet requires a value") 
-    if not c['gw']:
-      print ("WARNING: service sstp-server network-settings client-ip-settings gateway-address requires a value")
-  
-def generate(c):
-  if c == None:
-    return None
-  
-  ### accel-cmd reload doesn't work so any change results in a restart of the daemon
-  try:
-    if os.cpu_count() == 1:
-      c['thread_cnt'] = 1
-    else:
-      c['thread_cnt'] = int(os.cpu_count()/2)
-  except KeyError:
-    if os.cpu_count() == 1:
-      c['thread_cnt'] = 1
-    else:
-      c['thread_cnt'] = int(os.cpu_count()/2)
-
-  tmpl = jinja2.Template(sstp_config, trim_blocks=True)
-  config_text = tmpl.render(c)
-  open(sstp_conf,'w').write(config_text)
-
-  if c['authentication']['local-users']:
-    write_chap_secrets(c)
-
-  return c
-
-def apply(c):
-  if c == None:
-    if os.path.exists(pidfile):
-      accel_cmd('shutdown hard')
-      if os.path.exists(pidfile):
-        os.remove(pidfile)
-    return None
-
-  if not os.path.exists(pidfile):
-    ret = subprocess.call(['/usr/sbin/accel-pppd','-c',sstp_conf,'-p',pidfile,'-d'])
-    chk_con()
-    if ret !=0 and os.path.exists(pidfile):
-      os.remove(pidfile)
-      raise ConfigError('accel-pppd failed to start')
-  else:
-    accel_cmd('restart')
-    sl.syslog(sl.LOG_NOTICE, "reloading config via daemon restart")
-
-if __name__ == '__main__':
-  try:
-    c = get_config()
-    verify(c)
-    generate(c)
-    apply(c)
-  except ConfigError as e:
-    print(e)
-    sys.exit(1)
diff --git a/src/conf_mode/ntp.py b/src/conf_mode/ntp.py
index f706d502f..c3e8d51b3 100755
--- a/src/conf_mode/ntp.py
+++ b/src/conf_mode/ntp.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 #
-# Copyright (C) 2018 VyOS maintainers and contributors
+# Copyright (C) 2018-2020 VyOS maintainers and contributors
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 or later as
@@ -13,15 +13,13 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-#
 
 import sys
 import os
-
 import jinja2
 import ipaddress
-import copy
+
+from copy import deepcopy
 
 from vyos.config import Config
 from vyos import ConfigError
@@ -78,7 +76,7 @@ default_config_data = {
 }
 
 def get_config():
-    ntp = copy.deepcopy(default_config_data)
+    ntp = deepcopy(default_config_data)
     conf = Config()
     if not conf.exists('system ntp'):
         return None
diff --git a/src/conf_mode/vpn_sstp.py b/src/conf_mode/vpn_sstp.py
new file mode 100755
index 000000000..a2e7c9327
--- /dev/null
+++ b/src/conf_mode/vpn_sstp.py
@@ -0,0 +1,545 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2020 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import jinja2
+
+from time import sleep
+from sys import exit
+from subprocess import Popen, PIPE, check_output
+from socket import socket, AF_INET, SOCK_STREAM
+from copy import deepcopy
+from stat import S_IRUSR, S_IWUSR, S_IRGRP
+from psutil import pid_exists
+
+from vyos.config import Config
+from vyos import ConfigError
+
+pidfile = r'/var/run/accel_sstp.pid'
+sstp_cnf_dir = r'/etc/accel-ppp/sstp'
+chap_secrets = sstp_cnf_dir + '/chap-secrets'
+sstp_conf = sstp_cnf_dir + '/sstp.config'
+ssl_cert_dir = r'/config/user-data/sstp'
+
+# config path creation
+if not os.path.exists(sstp_cnf_dir):
+    os.makedirs(sstp_cnf_dir)
+
+if not os.path.exists(ssl_cert_dir):
+    os.makedirs(ssl_cert_dir)
+
+sstp_config = """### generated by vpn_sstp.py ###
+[modules]
+log_syslog
+sstp
+ippool
+shaper
+{% if auth_mode == 'local' %}
+chap-secrets
+{% elif auth_mode == 'radius' %}
+radius
+{% endif -%}
+
+{% for proto in auth_proto %}
+{{proto}}
+{% endfor %}
+
+[core]
+thread-count={{thread_cnt}}
+
+[common]
+single-session=replace
+
+[log]
+syslog=accel-sstp,daemon
+copy=1
+level=5
+
+[client-ip-range]
+disable
+
+[sstp]
+verbose=1
+accept=ssl
+ssl-ca-file=/config/user-data/sstp/{{ ssl_ca }}
+ssl-pemfile=/config/user-data/sstp/{{ ssl_cert }}
+ssl-keyfile=/config/user-data/sstp/{{ ssl_key }}
+
+{% if client_ip_pool %}
+[ip-pool]
+gw-ip-address={{ client_gateway }}
+{% for subnet in client_ip_pool %}
+{{ subnet }}
+{% endfor %}
+{% endif %}
+
+{% if dnsv4 %}
+[dns]
+{% for dns in dnsv4 -%}
+dns{{ loop.index }}={{ dns }}
+{% endfor -%}
+{% endif %}
+
+{% if auth_mode == 'local' %}
+[chap-secrets]
+chap-secrets=/etc/accel-ppp/sstp/chap-secrets
+{% elif auth_mode == 'radius' %}
+[radius]
+verbose=1
+{% for r in radius_server %}
+server={{ r.server }},{{ r.key }},auth-port={{ r.port }},req-limit=0,fail-time={{ r.fail_time }}
+{% endfor -%}
+
+acct-timeout={{ radius_acct_tmo }}
+timeout={{ radius_timeout }}
+max-try={{ radius_max_try }}
+
+{% if radius_nas_id %}
+nas-identifier={{ radius_nas_id }}
+{% endif -%}
+{% if radius_nas_ip %}
+nas-ip-address={{ radius_nas_ip }}
+{% endif -%}
+{% if radius_source_address %}
+bind={{ radius_source_address }}
+{% endif -%}
+
+
+{% if radius_dynamic_author %}
+dae-server={{ radius_dynamic_author.server }}:{{ radius_dynamic_author.port }},{{ radius_dynamic_author.key }}
+{% endif -%}
+{% endif %}
+
+[ppp]
+verbose=1
+check-ip=1
+{% if mtu %}
+mtu={{ mtu }}
+{% endif -%}
+
+{% if ppp_mppe %}
+mppe={{ ppp_mppe }}
+{% endif -%}
+{% if ppp_echo_interval %}
+lcp-echo-interval={{ ppp_echo_interval }}
+{% endif -%}
+{% if ppp_echo_failure %}
+lcp-echo-failure={{ ppp_echo_failure }}
+{% endif -%}
+{% if ppp_echo_timeout %}
+lcp-echo-timeout={{ ppp_echo_timeout }}
+{% endif %}
+
+{% if radius_shaper_attr %}
+[shaper]
+verbose=1
+attr={{ radius_shaper_attr }}
+{% if radius_shaper_vendor %}
+vendor={{ radius_shaper_vendor }}
+{% endif -%}
+{% endif %}
+
+[cli]
+tcp=127.0.0.1:2005
+
+"""
+
+# sstp chap secrets
+chap_secrets_conf = """
+# username  server  password  acceptable local IP addresses   shaper
+{% for user in local_users %}
+{% if user.state == 'enabled' %}
+{% if user.upload and user.download %}
+{{ "%-12s" | format(user.name) }} * {{ "%-16s" | format(user.password) }} {{ "%-16s" | format(user.ip) }} {{ user.download }} / {{ user.upload }}
+{% else %}
+{{ "%-12s" | format(user.name) }} * {{ "%-16s" | format(user.password) }} {{ "%-16s" | format(user.ip) }}
+{% endif %}
+{% endif %}
+{% endfor %}
+"""
+
+def subprocess_cmd(command):
+    p = Popen(command, stdout=PIPE, shell=True)
+    p.communicate()
+
+def chk_con():
+    cnt = 0
+    s = socket(AF_INET, SOCK_STREAM)
+    while True:
+        try:
+            s.connect(("127.0.0.1", 2005))
+            s.close()
+            break
+        except ConnectionRefusedError:
+            sleep(0.5)
+            cnt += 1
+            if cnt == 100:
+                raise("failed to start sstp server")
+                break
+
+def accel_cmd(cmd):
+    if not cmd:
+        return None
+
+    try:
+        ret = check_output(['/usr/bin/accel-cmd', '-p', '2005', cmd])
+        return ret.decode().strip()
+
+    except:
+        return 1
+
+default_config_data = {
+    'local_users' : [],
+    'auth_mode' : 'local',
+    'auth_proto' : [],
+    'radius_server' : [],
+    'radius_acct_tmo' : '3',
+    'radius_max_try' : '3',
+    'radius_timeout' : '3',
+    'radius_nas_id' : '',
+    'radius_nas_ip' : '',
+    'radius_source_address' : '',
+    'radius_shaper_attr' : '',
+    'radius_shaper_vendor': '',
+    'radius_dynamic_author' : '',
+    'ssl_ca' : '',
+    'ssl_cert' : '',
+    'ssl_key' : '',
+    'client_ip_pool' : [],
+    'dnsv4' : [],
+    'mtu' : '',
+    'ppp_mppe' : '',
+    'ppp_echo_failure' : '',
+    'ppp_echo_interval' : '',
+    'ppp_echo_timeout' : '',
+    'thread_cnt' : ''
+}
+
+def get_config():
+    sstp = deepcopy(default_config_data)
+    base_path = ['vpn', 'sstp']
+    conf = Config()
+    if not conf.exists(base_path):
+        return None
+
+    conf.set_level(base_path)
+
+    cpu = int(os.cpu_count()/2)
+    if cpu < 1:
+        cpu = 1
+    sstp['thread_cnt'] = cpu
+
+    if conf.exists(['authentication', 'mode']):
+        sstp['auth_mode'] = conf.return_value(['authentication', 'mode'])
+
+    #
+    # local auth
+    if conf.exists(['authentication', 'local-users']):
+        for username in conf.list_nodes(['authentication', 'local-users', 'username']):
+            user = {
+                'name' : username,
+                'password' : '',
+                'state' : 'enabled',
+                'ip' : '*',
+                'upload' : None,
+                'download' : None
+            }
+
+            conf.set_level(base_path + ['authentication', 'local-users', 'username', username])
+
+            if conf.exists(['password']):
+                user['password'] = conf.return_value(['password'])
+
+            if conf.exists(['disable']):
+                user['state'] = 'disable'
+
+            if conf.exists(['static-ip']):
+                user['ip'] = conf.return_value(['static-ip'])
+
+            if conf.exists(['rate-limit', 'download']):
+                user['download'] = conf.return_value(['rate-limit', 'download'])
+
+            if conf.exists(['rate-limit', 'upload']):
+                user['upload'] = conf.return_value(['rate-limit', 'upload'])
+
+            sstp['local_users'].append(user)
+
+    #
+    # RADIUS auth and settings
+    conf.set_level(base_path + ['authentication', 'radius'])
+    if conf.exists(['server']):
+        for server in conf.list_nodes(['server']):
+            radius = {
+                'server' : server,
+                'key' : '',
+                'fail_time' : 0,
+                'port' : '1812'
+            }
+
+            conf.set_level(base_path + ['authentication', 'radius', 'server', server])
+
+            if conf.exists(['fail-time']):
+                radius['fail-time'] = conf.return_value(['fail-time'])
+
+            if conf.exists(['port']):
+                radius['port'] = conf.return_value(['port'])
+
+            if conf.exists(['key']):
+                radius['key'] = conf.return_value(['key'])
+
+            if not conf.exists(['disable']):
+                sstp['radius_server'].append(radius)
+
+        #
+        # advanced radius-setting
+        conf.set_level(base_path + ['authentication', 'radius'])
+
+        if conf.exists(['acct-timeout']):
+            sstp['radius_acct_tmo'] = conf.return_value(['acct-timeout'])
+
+        if conf.exists(['max-try']):
+            sstp['radius_max_try'] = conf.return_value(['max-try'])
+
+        if conf.exists(['timeout']):
+            sstp['radius_timeout'] = conf.return_value(['timeout'])
+
+        if conf.exists(['nas-identifier']):
+            sstp['radius_nas_id'] = conf.return_value(['nas-identifier'])
+
+        if conf.exists(['nas-ip-address']):
+            sstp['radius_nas_ip'] = conf.return_value(['nas-ip-address'])
+
+        if conf.exists(['source-address']):
+            sstp['radius_source_address'] = conf.return_value(['source-address'])
+
+        # Dynamic Authorization Extensions (DOA)/Change Of Authentication (COA)
+        if conf.exists(['dynamic-author']):
+            dae = {
+                'port' : '',
+                'server' : '',
+                'key' : ''
+            }
+
+            if conf.exists(['dynamic-author', 'server']):
+                dae['server'] = conf.return_value(['dynamic-author', 'server'])
+
+            if conf.exists(['dynamic-author', 'port']):
+                dae['port'] = conf.return_value(['dynamic-author', 'port'])
+
+            if conf.exists(['dynamic-author', 'key']):
+                dae['key'] = conf.return_value(['dynamic-author', 'key'])
+
+            sstp['radius_dynamic_author'] = dae
+
+        if conf.exists(['rate-limit', 'enable']):
+            sstp['radius_shaper_attr'] = 'Filter-Id'
+            c_attr = ['rate-limit', 'enable', 'attribute']
+            if conf.exists(c_attr):
+                sstp['radius_shaper_attr'] = conf.return_value(c_attr)
+
+            c_vendor = ['rate-limit', 'enable', 'vendor']
+            if conf.exists(c_vendor):
+                sstp['radius_shaper_vendor'] = conf.return_value(c_vendor)
+
+    #
+    # authentication protocols
+    conf.set_level(base_path + ['authentication'])
+    if conf.exists(['protocols']):
+        auth_mods = {
+            'pap': 'auth_pap',
+            'chap': 'auth_chap_md5',
+            'mschap': 'auth_mschap_v1',
+            'mschap-v2': 'auth_mschap_v2'
+        }
+
+        for proto in conf.return_values(['protocols']):
+            sstp['auth_proto'].append(auth_mods[proto])
+
+    else:
+        sstp['auth_proto'] = ['auth_mschap_v2']
+
+    #
+    # read in SSL certs
+    conf.set_level(base_path + ['ssl'])
+    if conf.exists(['ca-cert-file']):
+        sstp['ssl_ca'] = conf.return_value(['ca-cert-file'])
+
+    if conf.exists(['cert-file']):
+        sstp['ssl_cert'] = conf.return_value(['cert-file'])
+
+    if conf.exists(['key-file']):
+        sstp['ssl_key'] = conf.return_value(['key-file'])
+
+
+    #
+    # read in client ip pool settings
+    conf.set_level(base_path + ['network-settings', 'client-ip-settings'])
+    if conf.exists(['subnet']):
+        sstp['client_ip_pool'] = conf.return_values(['subnet'])
+
+    if conf.exists(['gateway-address']):
+        sstp['client_gateway'] = conf.return_value(['gateway-address'])
+
+    #
+    # read in network settings
+    conf.set_level(base_path + ['network-settings'])
+    if conf.exists(['name-server']):
+        sstp['dnsv4'] = conf.return_values(['name-server'])
+
+    if conf.exists(['mtu']):
+        sstp['mtu'] = conf.return_value(['mtu'])
+
+    #
+    # read in PPP stuff
+    conf.set_level(base_path + ['ppp-settings'])
+    if conf.exists('mppe'):
+        sstp['ppp_mppe'] = conf.return_value('ppp-settings mppe')
+
+    if conf.exists(['lcp-echo-failure']):
+        sstp['ppp_echo_failure'] = conf.return_value(['lcp-echo-failure'])
+
+    if conf.exists(['lcp-echo-interval']):
+        sstp['ppp_echo_interval'] = conf.return_value(['lcp-echo-interval'])
+
+    if conf.exists(['lcp-echo-timeout']):
+        sstp['ppp_echo_timeout'] = conf.return_value(['lcp-echo-timeout'])
+
+    return sstp
+
+
+def verify(sstp):
+    if sstp is None:
+        return None
+
+    # vertify auth settings
+    if sstp['auth_mode'] == 'local':
+        if not sstp['local_users']:
+            raise ConfigError('sstp-server authentication local-users required')
+
+        for user in sstp['local_users']:
+            if not user['password']:
+                raise ConfigError(f"Password required for user {user['name']}")
+
+            # if up/download is set, check that both have a value
+            if user['upload'] and not user['download']:
+                raise ConfigError(f"Download speed value required for user {user['name']}")
+
+            if user['download'] and not user['upload']:
+                raise ConfigError(f"Upload speed value required for user {user['name']}")
+
+        if not sstp['client_ip_pool']:
+            raise ConfigError("Client IP subnet required")
+
+        if not sstp['client_gateway']:
+            raise ConfigError("Client gateway IP address required")
+
+    if len(sstp['dnsv4']) > 2:
+        raise ConfigError("Only 2 DNS name-servers can be configured")
+
+    if not sstp['ssl_ca'] or not sstp['ssl_cert'] or not sstp['ssl_key']:
+        raise ConfigError('One or more SSL certificates missing')
+
+    ssl_path = ssl_cert_dir + '/'
+    if not os.path.exists(ssl_path + sstp['ssl_ca']):
+        ca = ssl_path + sstp['ssl_ca']
+        raise ConfigError(f'CA cert file {ca} does not exist')
+
+    if not os.path.exists(ssl_path + sstp['ssl_cert']):
+        cert = ssl_path + sstp['ssl_cert']
+        raise ConfigError(f'SSL cert file {cert} does not exist')
+
+    if not os.path.exists(ssl_path + sstp['ssl_key']):
+        key = ssl_path + sstp['ssl_key']
+        raise ConfigError(f'SSL key file {key} does not exist')
+
+    if sstp['auth_mode'] == 'radius':
+        if len(sstp['radius_server']) == 0:
+            raise ConfigError('RADIUS authentication requires at least one server')
+
+        for radius in sstp['radius_server']:
+            if not radius['key']:
+                raise ConfigError(f"Missing RADIUS secret for server {{ radius['key'] }}")
+
+def generate(sstp):
+    if sstp is None:
+        return None
+
+    # accel-cmd reload doesn't work so any change results in a restart of the daemon
+    tmpl = jinja2.Template(sstp_config, trim_blocks=True)
+    config_text = tmpl.render(sstp)
+    with open(sstp_conf, 'w') as f:
+        f.write(config_text)
+
+    if sstp['local_users']:
+        tmpl = jinja2.Template(chap_secrets_conf, trim_blocks=True)
+        config_text = tmpl.render(sstp)
+        with open(chap_secrets, 'w') as f:
+            f.write(config_text)
+
+        os.chmod(chap_secrets, S_IRUSR | S_IWUSR | S_IRGRP )
+    else:
+        if os.path.exists(chap_secrets):
+             os.unlink(chap_secrets)
+
+    return sstp
+
+def apply(sstp):
+    pid = 0
+    if os.path.isfile(pidfile):
+        pid = 0
+        with open(pidfile, 'r') as f:
+            pid = int(f.read())
+
+    if sstp is None:
+        if pid_exists(pid):
+            cmd  = 'start-stop-daemon --stop --quiet'
+            cmd += ' --pidfile ' + pidfile
+            subprocess_cmd(cmd)
+
+        if os.path.exists(pidfile):
+            os.remove(pidfile)
+
+        return None
+
+    if not pid_exists(pid):
+        if os.path.exists(pidfile):
+            os.remove(pidfile)
+
+        cmd  = 'start-stop-daemon --start --quiet'
+        cmd += ' --pidfile ' + pidfile
+        cmd += ' --exec /usr/sbin/accel-pppd'
+        # now pass arguments to accel-pppd binary
+        cmd += ' --'
+        cmd += ' -c ' + sstp_conf
+        cmd += ' -p ' + pidfile
+        cmd += ' -d'
+        subprocess_cmd(cmd)
+
+        chk_con()
+
+    else:
+        accel_cmd('restart')
+
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)
diff --git a/src/migration-scripts/sstp/0-to-1 b/src/migration-scripts/sstp/0-to-1
new file mode 100755
index 000000000..1d1bea51f
--- /dev/null
+++ b/src/migration-scripts/sstp/0-to-1
@@ -0,0 +1,130 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# - migrate from "service sstp-server" to "vpn sstp"
+# - remove primary/secondary identifier from nameserver
+# - migrate RADIUS configuration to a more uniform syntax accross the system
+#   - authentication radius-server x.x.x.x to authentication radius server x.x.x.x
+#   - authentication radius-settings to authentication radius
+#   - do not migrate radius server req-limit, use default of unlimited
+# - migrate SSL certificate path
+
+import os
+import sys
+
+from vyos.configtree import ConfigTree
+
+if (len(sys.argv) < 1):
+    print("Must specify file name!")
+    sys.exit(1)
+
+file_name = sys.argv[1]
+
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+config = ConfigTree(config_file)
+old_base = ['service', 'sstp-server']
+if not config.exists(old_base):
+    # Nothing to do
+    sys.exit(0)
+else:
+    # ensure new base path exists
+    if not config.exists(['vpn']):
+        config.set(['vpn'])
+
+    new_base = ['vpn', 'sstp']
+    # copy entire tree
+    config.copy(old_base, new_base)
+    config.delete(old_base)
+
+    # migrate DNS servers
+    dns_base = new_base + ['network-settings', 'dns-server']
+    if config.exists(dns_base):
+        if config.exists(dns_base + ['primary-dns']):
+            dns = config.return_value(dns_base + ['primary-dns'])
+            config.set(new_base + ['network-settings', 'name-server'], value=dns, replace=False)
+
+        if config.exists(dns_base + ['secondary-dns']):
+            dns = config.return_value(dns_base + ['secondary-dns'])
+            config.set(new_base + ['network-settings', 'name-server'], value=dns, replace=False)
+
+        config.delete(dns_base)
+
+
+    # migrate radius options - copy subtree
+    # thus must happen before migration of the individual RADIUS servers
+    old_options = new_base + ['authentication', 'radius-settings']
+    new_options = new_base + ['authentication', 'radius']
+    config.copy(old_options, new_options)
+    config.delete(old_options)
+
+
+    # migrate radius dynamic author / change of authorisation server
+    dae_old = new_base + ['authentication', 'radius', 'dae-server']
+    if config.exists(dae_old):
+        config.rename(dae_old, 'dynamic-author')
+        dae_new = new_base + ['authentication', 'radius', 'dynamic-author']
+
+        if config.exists(dae_new + ['ip-address']):
+            config.rename(dae_new + ['ip-address'], 'server')
+
+        if config.exists(dae_new + ['secret']):
+            config.rename(dae_new + ['secret'], 'key')
+
+
+    # migrate radius server
+    radius_server = new_base + ['authentication', 'radius-server']
+    if config.exists(radius_server):
+        for server in config.list_nodes(radius_server):
+            base = radius_server + [server]
+            new = new_base + ['authentication', 'radius', 'server', server]
+
+            # convert secret to key
+            if config.exists(base + ['secret']):
+                tmp = config.return_value(base + ['secret'])
+                config.set(new + ['key'], value=tmp)
+
+            if config.exists(base + ['fail-time']):
+                tmp = config.return_value(base + ['fail-time'])
+                config.set(new + ['fail-time'], value=tmp)
+
+        config.set_tag(new_base + ['authentication', 'radius', 'server'])
+        config.delete(radius_server)
+
+    # migrate SSL certificates
+    old_ssl = new_base + ['sstp-settings', 'ssl-certs']
+    new_ssl = new_base + ['ssl']
+    config.copy(old_ssl, new_ssl)
+    config.delete(old_ssl)
+
+    if config.exists(new_ssl + ['ca']):
+        config.rename(new_ssl + ['ca'], 'ca-cert-file')
+
+    if config.exists(new_ssl + ['server-cert']):
+        config.rename(new_ssl + ['server-cert'], 'cert-file')
+
+    if config.exists(new_ssl + ['server-key']):
+        config.rename(new_ssl + ['server-key'], 'key-file')
+
+
+    try:
+        with open(file_name, 'w') as f:
+            f.write(config.to_string())
+    except OSError as e:
+        print("Failed to save the modified config: {}".format(e))
+        sys.exit(1)