5 files changed, 69 insertions, 45 deletions
diff --git a/data/templates/ssh/override.conf.j2 b/data/templates/ssh/override.conf.j2
new file mode 100644
index 000000000..e4d6f51cb
--- /dev/null
+++ b/data/templates/ssh/override.conf.j2
@@ -0,0 +1,13 @@
+{% set vrf_command = 'ip vrf exec ' ~ vrf ~ ' ' if vrf is vyos_defined else '' %}
+[Unit]
+StartLimitIntervalSec=0
+After=vyos-router.service
+ConditionPathExists={{ config_file }}
+
+[Service]
+ExecStart=
+ExecStart={{ vrf_command }}/usr/sbin/sshd -f {{ config_file }} -D $SSHD_OPTS
+Restart=always
+RestartPreventExitStatus=
+RestartSec=10
+RuntimeDirectoryPreserve=yes
diff --git a/data/templates/ssh/override.conf.tmpl b/data/templates/ssh/override.conf.tmpl
deleted file mode 100644
index 5f8f35e89..000000000
--- a/data/templates/ssh/override.conf.tmpl
+++ /dev/null
@@ -1,13 +0,0 @@
-{% set vrf_command = 'ip vrf exec ' + vrf + ' ' if vrf is defined else '' %}
-[Unit]
-StartLimitIntervalSec=0
-After=vyos-router.service
-ConditionPathExists={{config_file}}
-
-[Service]
-ExecStart=
-ExecStart={{vrf_command}}/usr/sbin/sshd -f {{config_file}} -D $SSHD_OPTS
-Restart=always
-RestartPreventExitStatus=
-RestartSec=10
-RuntimeDirectoryPreserve=yes
diff --git a/data/templates/ssh/sshd_config.tmpl b/data/templates/ssh/sshd_config.j2
index 2f2b78a66..e7dbca581 100644
--- a/data/templates/ssh/sshd_config.tmpl
+++ b/data/templates/ssh/sshd_config.j2
@@ -29,6 +29,7 @@ UsePAM yes
 PermitRootLogin no
 PidFile /run/sshd/sshd.pid
 AddressFamily any
+DebianBanner no
 
 #
 # User configurable section
@@ -36,7 +37,7 @@ AddressFamily any
 
 # Look up remote host name and check that the resolved host name for the remote IP
 # address maps back to the very same IP address.
-UseDNS {{ "no" if disable_host_validation is defined else "yes" }}
+UseDNS {{ "no" if disable_host_validation is vyos_defined else "yes" }}
 
 # Specifies the port number that sshd(8) listens on
 {% for value in port %}
@@ -47,61 +48,50 @@ Port {{ value }}
 LogLevel {{ loglevel | upper }}
 
 # Specifies whether password authentication is allowed
-PasswordAuthentication {{ "no" if disable_password_authentication is defined else "yes" }}
+PasswordAuthentication {{ "no" if disable_password_authentication is vyos_defined else "yes" }}
 
-{% if listen_address is defined and listen_address is not none %}
+{% if listen_address is vyos_defined %}
 # Specifies the local addresses sshd should listen on
-{%   for address in listen_address %}
+{%     for address in listen_address %}
 ListenAddress {{ address }}
-{%   endfor %}
+{%     endfor %}
 {% endif %}
 
-{% if ciphers is defined and ciphers is not none %}
+{% if ciphers is vyos_defined %}
 # Specifies the ciphers allowed for protocol version 2
-{%   set value = ciphers if ciphers is string else ciphers | join(',') %}
-Ciphers {{ value }}
+Ciphers {{ ciphers | join(',') }}
 {% endif %}
 
-{% if mac is defined and mac is not none %}
+{% if mac is vyos_defined %}
 # Specifies the available MAC (message authentication code) algorithms
-{%   set value = mac if mac is string else mac | join(',') %}
-MACs {{ value }}
+MACs {{ mac | join(',') }}
 {% endif %}
 
-{% if key_exchange is defined and key_exchange is not none %}
+{% if key_exchange is vyos_defined %}
 # Specifies the available Key Exchange algorithms
-{%   set value = key_exchange if key_exchange is string else key_exchange | join(',') %}
-KexAlgorithms {{ value }}
+KexAlgorithms {{ key_exchange | join(',') }}
 {% endif %}
 
-{% if access_control is defined and access_control is not none %}
-{%   if access_control.allow is defined and access_control.allow is not none %}
-{%     if access_control.allow.user is defined %}
+{% if access_control is vyos_defined %}
+{%     if access_control.allow.user is vyos_defined %}
 # If specified, login is allowed only for user names that match
-{%       set value = access_control.allow.user if access_control.allow.user is string else access_control.allow.user | join(' ') %}
-AllowUsers {{ value }}
+AllowUsers {{ access_control.allow.user | join(' ') }}
 {%     endif %}
-{%     if access_control.allow.group is defined %}
+{%     if access_control.allow.group is vyos_defined %}
 # If specified, login is allowed only for users whose primary group or supplementary group list matches
-{%       set value = access_control.allow.group if access_control.allow.group is string else access_control.allow.group | join(' ') %}
-AllowGroups {{ value }}
+AllowGroups {{ access_control.allow.group | join(' ') }}
 {%     endif %}
-{%   endif %}
-{%   if access_control.deny is defined and access_control.deny is not none %}
-{%     if access_control.deny.user is defined %}
+{%     if access_control.deny.user is vyos_defined %}
 # Login is disallowed for user names that match
-{%        set value = access_control.deny.user if access_control.deny.user is string else access_control.deny.user | join(' ') %}
-DenyUsers {{ value }}
+DenyUsers {{ access_control.deny.user | join(' ') }}
 {%     endif %}
-{%     if access_control.deny.group is defined %}
+{%     if access_control.deny.group is vyos_defined %}
 # Login is disallowed for users whose primary group or supplementary group list matches
-{%        set value = access_control.deny.group if access_control.deny.group is string else access_control.deny.group | join(' ') %}
-DenyGroups {{ value }}
+DenyGroups {{ access_control.deny.group | join(' ') }}
 {%     endif %}
-{%   endif %}
 {% endif %}
 
-{% if client_keepalive_interval is defined and client_keepalive_interval is not none %}
+{% if client_keepalive_interval is vyos_defined %}
 # Sets a timeout interval in seconds after which if no data has been received from the client,
 # sshd(8) will send a message through the encrypted channel to request a response from the client
 ClientAliveInterval {{ client_keepalive_interval }}
diff --git a/data/templates/ssh/sshguard_config.j2 b/data/templates/ssh/sshguard_config.j2
new file mode 100644
index 000000000..58c6ad48d
--- /dev/null
+++ b/data/templates/ssh/sshguard_config.j2
@@ -0,0 +1,27 @@
+### Autogenerated by ssh.py ###
+
+{% if dynamic_protection is vyos_defined %}
+# Full path to backend executable (required, no default)
+BACKEND="/usr/libexec/sshguard/sshg-fw-nft-sets"
+
+# Shell command that provides logs on standard output. (optional, no default)
+# Example 1: ssh and sendmail from systemd journal:
+LOGREADER="LANG=C journalctl -afb -p info -n1 -t sshd -o cat"
+
+#### OPTIONS ####
+# Block attackers when their cumulative attack score exceeds THRESHOLD.
+# Most attacks have a score of 10. (optional, default 30)
+THRESHOLD={{ dynamic_protection.threshold }}
+
+# Block attackers for initially BLOCK_TIME seconds after exceeding THRESHOLD.
+# Subsequent blocks increase by a factor of 1.5. (optional, default 120)
+BLOCK_TIME={{ dynamic_protection.block_time }}
+
+# Remember potential attackers for up to DETECTION_TIME seconds before
+# resetting their score. (optional, default 1800)
+DETECTION_TIME={{ dynamic_protection.detect_time }}
+
+# IP addresses listed in the WHITELIST_FILE are considered to be
+# friendlies and will never be blocked.
+WHITELIST_FILE=/etc/sshguard/whitelist
+{% endif %}
diff --git a/data/templates/ssh/sshguard_whitelist.j2 b/data/templates/ssh/sshguard_whitelist.j2
new file mode 100644
index 000000000..47a950a2b
--- /dev/null
+++ b/data/templates/ssh/sshguard_whitelist.j2
@@ -0,0 +1,7 @@
+### Autogenerated by ssh.py ###
+
+{% if dynamic_protection.allow_from is vyos_defined %}
+{%     for address in dynamic_protection.allow_from %}
+{{ address }}
+{%     endfor %}
+{% endif %}