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+Webproxy
+--------
+
+The proxy service in VyOS is based on Squid3 and some related modules.
+
+Squid3_ is a caching and forwarding HTTP web proxy. It has a wide variety of
+uses, including speeding up a web server by caching repeated requests,
+caching web, DNS and other computer network lookups for a group of people
+sharing network resources, and aiding security by filtering traffic. Although
+primarily used for HTTP and FTP, Squid includes limited support for several
+other protocols including Internet Gopher, SSL,[6] TLS and HTTPS. Squid does
+not support the SOCKS protocol.
+
+All examples here assumes that your inside ip address is ``192.168.0.1``.
+Replace with your own where applicable.
+
+URL Filtering is provided by Squidguard_.
+
+Configuration
+^^^^^^^^^^^^^^
+
+.. code-block:: none
+
+  # Enable proxy service
+  set service webproxy listen-address 192.168.0.1
+
+  # By default it will listen to port 3128. If you want something else you have to define that.
+  set service webproxy listen-address 192.168.0.1 port 2050
+
+  # By default the transparent proxy on that interface is enabled. To disable that you simply
+  set service webproxy listen-address 192.168.0.1 disable-transparent
+
+  # Block specific urls
+  set service webproxy url-filtering squidguard local-block myspace.com
+
+  # If you want to you can log these blocks
+  set service webproxy url-filtering squidguard log local-block
+
+
+Options
+*******
+
+Filtering by category
+^^^^^^^^^^^^^^^^^^^^^
+
+If you want to use existing blacklists you have to create/download a database
+first. Otherwise you will not be able to commit the config changes.
+
+.. code-block:: none
+
+  vyos@vyos# commit
+  [ service webproxy ]
+  Warning: no blacklists installed
+  Unknown block-category [ads] for policy [default]
+
+  [[service webproxy]] failed
+  Commit failed
+
+* Download/Update complete blacklist
+
+  :code:`update webproxy blacklists`
+
+* Download/Update partial blacklist
+
+  :code:`update webproxy blacklists category ads`
+
+  Use tab completion to get a list of categories.
+
+* To auto update the blacklist files
+
+  :code:`set service webproxy url-filtering squidguard auto-update update-hour 23`
+
+* To configure blocking add the following to the configuration
+
+  :code:`set service webproxy url-filtering squidguard block-category ads`
+
+  :code:`set service webproxy url-filtering squidguard block-category malware`
+
+Authentication
+^^^^^^^^^^^^^^
+
+The embedded Squid proxy can use LDAP to authenticate users against a company
+wide directory. The following configuration is an example of how to use Active
+Directory as authentication backend. Queries are done via LDAP.
+
+.. code-block:: none
+
+  vyos@vyos# show service webproxy
+   authentication {
+       children 5
+       credentials-ttl 60
+       ldap {
+           base-dn DC=example,DC=local
+           bind-dn CN=proxyuser,CN=Users,DC=example,DC=local
+           filter-expression (cn=%s)
+           password Qwert1234
+           server ldap.example.local
+           username-attribute cn
+       }
+       method ldap
+       realm "VyOS Webproxy"
+   }
+   cache-size 100
+   default-port 3128
+   listen-address 192.168.188.103 {
+       disable-transparent
+   }
+
+* ``base-dn`` set the base directory for the search
+* ``bind-dn`` and ``password``: set the user, which is used for the ldap search
+* ``filter-expression``: set the exact filter which a authorized user match in a ldap-search. In this example every User is able to authorized.
+
+You can find more about the ldap authentication `here <http://www.squid-cache.org/Versions/v3/3.2/manuals/basic_ldap_auth.html>`_
+
+Adjusting cache size
+^^^^^^^^^^^^^^^^^^^^
+
+The size of the proxy cache can be adjusted by the user.
+
+.. code-block:: none
+
+  set service webproxy cache-size
+   Possible completions:
+     <0-4294967295>
+                  Disk cache size in MB (default 100)
+     0            Disable disk caching
+     100
+
+Bypassing the webproxy
+^^^^^^^^^^^^^^^^^^^^^^
+
+Some services don't work correctly when being handled via a web proxy.
+So sometimes it is useful to bypass a transparent proxy:
+
+* To bypass the proxy for every request that is directed to a specific
+  destination:
+
+  :code:`set service webproxy whitelist destination-address 198.51.100.33`
+
+  :code:`set service webproxy whitelist destination-address 192.0.2.0/24`
+
+
+* To bypass the proxy for every request that is coming from a specific source:
+
+  :code:`set service webproxy whitelist source-address 192.168.1.2`
+
+  :code:`set service webproxy whitelist source-address 192.168.2.0/24`
+
+  (This can be useful when a called service has many and/or often changing
+  destination addresses - e.g. Netflix.)
+
+.. _Squid3: http://www.squid-cache.org/
+.. _Squidguard: http://www.squidguard.org/