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authorChristian Poessinger <christian@poessinger.com>2020-03-20 23:42:43 +0100
committerChristian Poessinger <christian@poessinger.com>2020-03-20 23:42:55 +0100
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-.. _sstp_server:
-
-###########
-SSTP Server
-###########
-
-:abbr:`SSTP (Secure Socket Tunneling Protocol)` is a form of :abbr:`VPN
-(Virtual Private Network)` tunnel that provides a mechanism to transport PPP
-traffic through an SSL/TLS channel. SSL/TLS provides transport-level security
-with key negotiation, encryption and traffic integrity checking. The use of
-SSL/TLS over TCP port 443 allows SSTP to pass through virtually all firewalls
-and proxy servers except for authenticated web proxies.
-
-SSTP is available for Linux, BSD, and Windows.
-
-VyOS utilizes accel-ppp_ to provide SSTP server functionality. We support both
-local and RADIUS authentication.
-
-As SSTP provides PPP via a SSL/TLS channel the use of either publically signed
-certificates as well as a private PKI is required.
-
-.. note:: All certificates should be stored on VyOS under
- ``/config/user-data/sstp``. If certificates are not stored unt ``/config``
- they will not be migrated during a software update.
-
-Self Signed CA and Certificates
-===============================
-
-To generate the CA, the server private key and certificates the following
-commands can be used.
-
-.. code-block:: none
-
-
- vyos@vyos:~$ mkdir -p /config/user-data/sstp
- vyos@vyos:~$ openssl req -newkey rsa:4096 -new -nodes -x509 -days 3650 -keyout /config/user-data/sstp/server.key -out /config/user-data/sstp/server.crt
-
- Generating a 4096 bit RSA private key
- .........................++
- ...............................................................++
- writing new private key to 'server.key'
- [...]
- Country Name (2 letter code) [AU]:
- State or Province Name (full name) [Some-State]:
- Locality Name (eg, city) []:
- Organization Name (eg, company) [Internet Widgits Pty Ltd]:
- Organizational Unit Name (eg, section) []:
- Common Name (e.g. server FQDN or YOUR name) []:
- Email Address []:
-
- vyos@vyos:~$ openssl req -new -x509 -key /config/user-data/sstp/server.key -out /config/user-data/sstp/ca.crt
- [...]
- Country Name (2 letter code) [AU]:
- State or Province Name (full name) [Some-State]:
- Locality Name (eg, city) []:
- Organization Name (eg, company) [Internet Widgits Pty Ltd]:
- Organizational Unit Name (eg, section) []:
- Common Name (e.g. server FQDN or YOUR name) []:
- Email Address []:
-
-
-Configuration
-=============
-
-.. cfgcmd:: set service sstp-server authentication local-users username <user> password <pass>
-
- Create `<user>` for local authentication on this system. The users password
- will be set to `<pass>`.
-
-.. cfgcmd:: set service sstp-server authentication protocols <pap | chap | mschap | mschap-v2>
-
- Require the peer to authenticate itself using one of the following protocols:
- pap, chap, mschap, mschap-v2.
-
-.. cfgcmd:: set service sstp-server authentication mode <local | radius>
-
- Set authentication backend. The configured authentication backend is used
- for all queries.
-
- * **radius**: All authentication queries are handled by a configured RADIUS
- server.
- * **local**: All authentication queries are handled locally.
-
-
-.. cfgcmd:: set service sstp-server network-settings client-ip-settings gateway-address <gateway>
-
- Specifies single `<gateway>` IP address to be used as local address of PPP
- interfaces.
-
-
-.. cfgcmd:: set service sstp-server network-settings client-ip-settings subnet <subnet>
-
- Use `<subnet>` as the IP pool for all connecting clients.
-
-
-.. cfgcmd:: set service sstp-server network-settings dns-server primary-dns <address>
-
- Connected client should use `<address>` as their primary DNS server.
-
-
-.. cfgcmd:: set service sstp-server network-settings dns-server secondary-dns <address>
-
- Connected client should use `<address>` as their secondary DNS server.
-
-SSL Certificates
-----------------
-
-.. cfgcmd:: set service sstp-server sstp-settings ssl-certs ca <file>
-
- Path to `<file>` pointing to the certificate authority certificate.
-
-.. cfgcmd:: set service sstp-server sstp-settings ssl-certs server-cert <file>
-
- Path to `<file>` pointing to the servers certificate (public portion).
-
-.. cfgcmd:: set service sstp-server sstp-settings ssl-certs server-key <file>
-
- Path to `<file>` pointing to the servers certificate (private portion).
-
-PPP Settings
-------------
-
-.. cfgcmd:: set service sstp-server ppp-settings lcp-echo-failure <number>
-
- Defines the maximum `<number>` of unanswered echo requests. Upon reaching the
- value `<number>`, the session will be reset.
-
-.. cfgcmd:: set service sstp-server ppp-settings lcp-echo-interval <interval>
-
- If this option is specified and is greater than 0, then the PPP module will
- send LCP pings of the echo request every `<interval>` seconds.
-
-.. cfgcmd:: set service sstp-server ppp-settings lcp-echo-timeout
-
- Specifies timeout in seconds to wait for any peer activity. If this option
- specified it turns on adaptive lcp echo functionality and "lcp-echo-failure"
- is not used.
-
-.. cfgcmd:: set service sstp-server ppp-settings mppe <require | prefer | deny>
-
- Specifies :abbr:`MPPE (Microsoft Point-to-Point Encryption)` negotioation
- preference.
-
- * **require** - ask client for mppe, if it rejects drop connection
- * **prefer** - ask client for mppe, if it rejects don't fail
- * **deny** - deny mppe
-
- Default behavior - don't ask client for mppe, but allow it if client wants.
- Please note that RADIUS may override this option by MS-MPPE-Encryption-Policy
- attribute.
-
-
-RADIUS
-------
-
-Server
-^^^^^^
-
-.. cfgcmd:: set service sstp-server authentication radius-server <server> secret <secret>
-
- Configure RADIUS `<server>` and its required shared `<secret>` for
- communicating with the RADIUS server.
-
-.. cfgcmd:: set service sstp-server authentication radius-server <server> secret <secret>
-
- Configure RADIUS `<server>` and its required shared `<secret>` for
- communicating with the RADIUS server.
-
-.. cfgcmd:: set service sstp-server authentication radius-server <server> fail-time <time>
-
- Mark RADIUS server as offline for this given `<time>` in seconds.
-
-.. cfgcmd:: set service sstp-server authentication radius-server <server> req-limit <limit>
-
- Maximum number of simultaneous requests to RADIUS server, default is
- unlimited.
-
-Options
-^^^^^^^
-
-.. cfgcmd:: set service sstp-server authentication radius-settings acct-timeout
-
- Timeout to wait reply for Interim-Update packets. (default 3 seconds)
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings dae-server ip-address <address>
-
- Specifies IP address for Dynamic Authorization Extension server (DM/CoA)
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings dae-server port <port>
-
- Port for Dynamic Authorization Extension server (DM/CoA)
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings dae-server secret <secret>
-
- Secret for Dynamic Authorization Extension server (DM/CoA)
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings max-try <number>
-
- Maximum number of tries to send Access-Request/Accounting-Request queries
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings timeout <timeout>
-
- Timeout to wait response from server (seconds)
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings nas-identifier <identifier>
-
- Value to send to RADIUS server in NAS-Identifier attribute and to be matched
- in DM/CoA requests.
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings nas-ip-address <address>
-
- 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.
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings rate-limit attribute <attribute>
-
- Specifies which RADIUS server attribute contains the rate limit information.
- The default attribute is `Filter-Id`.
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings rate-limit enable
-
- Enables bandwidth shaping via RADIUS.
-
-
-.. cfgcmd:: set service sstp-server authentication radius-settings rate-limit vendor
-
- Specifies the vendor dictionary, dictionary needs to be in
- /usr/share/accel-ppp/radius.
-
-
-
-Example
-=======
-
-* Use local user `foo` with password `bar`
-* Client IP addresses will be provided from pool `192.0.2.0/24`
-
-Use <tab> to setup the ``set sstp-settings ssl-certs ...``, it automatically
-looks for all files and directories in ``/config/user-data/sstp``.
-
-.. code-block:: none
-
- set service sstp-server authentication local-users username foo password 'bar'
- set service sstp-server authentication mode 'local'
- set service sstp-server network-settings client-ip-settings gateway-address '192.0.2.0'
- set service sstp-server network-settings client-ip-settings subnet '192.0.2.0/24'
- set service sstp-server network-settings dns-server primary-dns '10.100.100.1'
- set service sstp-server network-settings dns-server secondary-dns '10.200.100.1'
- set service sstp-server sstp-settings ssl-certs ca 'ca.crt'
- set service sstp-server sstp-settings ssl-certs server-cert 'server.crt'
- set service sstp-server sstp-settings ssl-certs server-key 'server.key'
-
-.. include:: ../common-references.rst