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270 lines
7.5 KiB
ReStructuredText
270 lines
7.5 KiB
ReStructuredText
================
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Setup WPAD / PAC
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================
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---
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PAC
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---
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Introduction
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============
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OPNsense supports generating PAC files to provide automatic proxy configuration
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files to clients. For example if your web GUI is running at http://192.168.0.1/,
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your PAC URL will be http://192.168.0.1/wpad.dat.
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In Firefox you can configure your proxy using PAC by the following steps
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manually:
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* Click the menu Icon and open "Settings"
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* Scroll down to "Network Proxy" and click "Settings"
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* Check "Automatic Proxy Configuration Address"
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* Enter the URL of the PAC file like mentioned in the paragraph above into
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the text field and click "OK"
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.. Warning::
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Your browser may be unable to connect to the internet if the PAC file is
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not available. This type of configuration is not recommended on mobile
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devices like laptops if employees can use the devices for home office.
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For such devices WPAD should be used.
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Configuring PAC
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===============
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First Step: Creating Matches
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----------------------------
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Go to :menuselection:`Services --> Proxy --> Configuration` and open Match
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.. image:: images/pac_menu_match.png
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Enter a name for the match and an optional description.
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Then choose what to match on. In our example we want to achieve
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that hostnames without a FQDN (like server01) and also our
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internal domain (example.com) will be excluded from the proxy.
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=========== ==================================================
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Name A unique name for the match to call it from rules.
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Description A short description for your own reference.
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Negate Inverts the match (any that does not match)
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Match Type Choose what you want to match on
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=========== ==================================================
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The rest of the fields depend on the used `Match Type`.
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For example if we match on "Plain Hostname", we do not need any
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additional parameters.
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The match "Plain Hostname means no dots inside the domain so if we
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want to create a fqdn match, we can simply invert this:
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.. image:: images/pac_match_fqdn.png
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=========== ==============
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Name is_fqdn
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Description can stay empty
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Negate checked
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Match Type Plain Hostname
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=========== ==============
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.. image:: images/pac_internal_domain.png
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============ =================================
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Name not_internal
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Description can stay empty
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Negate checked
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Match Type Hostname matches
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Host Pattern Wildcard for your internal domain
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============ =================================
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Second Step: Create Proxy Servers
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---------------------------------
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Now switch to :menuselection:`PAC --> Proxies` and add new proxy servers.
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=========== ================================================================
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Name Enter a name which will be shown at the rules view for selection
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Description You can add an optional description for this proxy
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Proxy Type Enter a Proxy type or DIRECT if no proxy should be used
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URL Enter the Proxy URL unless DIRECT has been choosen
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=========== ================================================================
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In this case it is assumed that only a single LAN and a DMZ exists and that
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internal connections should not run over the proxy.
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To make meaningful rules, we need two possible return values:
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* The LAN Proxy
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* No Proxy
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No proxy is quite simple to configure:
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.. image:: images/pac_proxy_direct.png
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=========== =================
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Name direct
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Description can stay empty
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Proxy Type Direct Connection
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URL empty
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=========== =================
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For outgoing connectins we need the proxy:
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.. image:: images/pac_proxy_lan.png
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=========== ===========================
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Name lan_proxy
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Description can stay empty
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Proxy Type Proxy
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URL Proxy IP + ':' + Proxy Port
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=========== ===========================
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Third Step: Create Rules
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------------------------
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Now as the matches and the proxies exist, rules can be built.
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For that, switching to :menuselection:`PAC --> Rules` is required.
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Now the following rule needs to be created:
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.. image:: images/pac_rule.png
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=========== ===========================
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Enabled checked
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Description a description for your reference
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Matches the two previously created matches
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Join Type And
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Match Type If
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Proxies Select the LAN proxy
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=========== ===========================
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Click the orange reload button and you are done.
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----
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WPAD
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----
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Web Proxy Auto Discovery is used to find the PAC file for the domain.
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Using DNS (Unbound)
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===================
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Variant 1: Automatic Configuration
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----------------------------------
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.. Warning::
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When you use this option, the wpad hosts and the TXT records for
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the domain will be overridden. This may break some other records
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like TXT records for SPF for this particular domain.
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In Unbound, you can simply check the following checkbox:
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.. Image:: images/wpad_dns_unbound2.png
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This will define the host records of any domain configured in DHCP
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as CNAME for your firewall host. It will also override TXT records
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resolve to the URL to the PAC file.
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Variant 2: Manual Configuration
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-------------------------------
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.. Warning::
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When DNS is used, OPNsense must respond via HTTP on port 80.
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Open the page :menuselection:`Services --> Unbound DNS --> Overrides` and add a new host override
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for the `wpad` host:
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.. image:: images/wpad_dns_unbound.png
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=========== =========================================================
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Host wpad
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Domain your domain
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Type A or AAAA
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IP IP of your OPNsense (where the Web interface is reachable
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Description can stay empty
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=========== =========================================================
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Save the settings and apply the changes.
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Using DHCP
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==========
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Variant 1: Automatic Configuration
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----------------------------------
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In the DHCP server settings, you can check the following checkbox:
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.. image:: images/wpad_dhcp.png
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In this case, an entry for the protocol and the port of the web interface
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will be created with the domain you choose in your system settings
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(domain of the firewall). The hostname is `wpad`. If you are running
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the OPNsense web interface on port 80 with HTTP. The following URL will be
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created:
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http://wpad.example.com:80/wpad.dat
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.. Warning::
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If you have **HTTP Redirect** enabled via :menuselection:`System --> Settings --> Administration`,
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make sure your browser accepts the certificate presented by OPNsense, as it won't
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download wpad.dat if the certificate is untrusted.
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Variant 2: Manual Configuration
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-------------------------------
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Open the page :menuselection:`Services --> DHCP --> Server`, select the correct interface and
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scroll down to the "Additional Options".
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Add this line and save:
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.. image:: images/wpad_dhcp_option.png
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====== ======================================
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Number 252
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Type String
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Value PAC file URL enclosed in double quotes
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====== ======================================
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---------------------
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Firefox Configuration
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---------------------
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Open Settings Menu
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==================
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First, the settings menu must be opened. There are two ways. You can either
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.. image:: images/pac_firefox_menu.png
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first click `Edit`
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.. image:: images/pac_firefox_edit.png
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then click `Preferences` or you can also
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.. image:: images/pac_firefox_menu2.png
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click the menu icon and then click `Preferences`.
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Configure Proxy
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===============
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.. image:: images/pac_firefox_network_proxy_setting.png
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Then scroll down to the bottom of the page and click `Settings` in the
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`Network Proxy` settings.
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.. image:: images/pac_firefox_proxy_settings.png
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In the newly opened window, you can setup your proxy settings.
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If you want to force Firefox to use WPAD/PAC, choose
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`Auto-detect proxy settings for this Network`.
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Click save and you are done.
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