Configuring the SquidGuard Package squidGuard is a URL redirector used to integrate blacklists with the Squid proxy software. There are two big advantages to squidGuard: it is fast and it is free. SquidGuard is published under the GNU Public License. SquidGuard can be used to • Limit the web access for some users to a list of accepted/well known web servers and/or URLs only.

Installation Squid2/3 + squidGuard on pfSense 2.1.x¶ Open Packages list: click System > Packages, Available Packages tab; Install the Squid package if it is not already installed. Install the squidGuard package; Configure Squid package. Configure squidGuard package. Install SquidGuard with Squid proxy server: Complete guide. Squidguard uses blacklists to control access to websites & define the website to which URL has to be redirected. We have option to create a custom blacklist or can use one of many available on the internet. SquidGuard can be installed on Linux as well Unix.

• Block access to some listed or blacklisted web servers and/or URLs for some users. • Block access to URLs matching a list of regular expressions or words for some users.

• Enforce the use of domain names/prohibit the use of IP addresses in URLs. • Redirect blocked URLs to an info page.

• Redirect banners to an empty GIF. • Have different access rules based on time of day, day of the week, date etc. Blacklist Blacklists are optional, but often useful for allowing access to certain types of sites. SquidGuard comes with a small blacklist basically for testing purposes.

They should not be used in production. A better way is to start with one of the blacklist collections listed (alphabetically) below.

• - They are freely available. • - Free for non commercial/private use. (Recommended) • Downloading blacklist: • Open General Settings tab in squidGuard package GUI, found at Services > Proxy Filter.

• Check Blacklist to enable the use of blacklists • Enter blacklist URL in the field Blacklist URL. • If the firewall is itself behind a proxy, enter the proxy information in Blacklist proxy (this step is not necessary for most people) • Click Save • Navigate to the Blacklist tab inside of squidGuard • Click the Download button. • Wait while blacklist will downloaded and prepared to use (10-35 min). Progress will be displayed on that page as the list is downloaded and processed.

Basic configuration Here describes how to enable and configure squidGuard, and common users access. • Open General settings tab. • Check the Enable box to activate the package. • Set Blacklist options to use blacklist categories.

(See above, optional) • Click Save button. • Open Common ACL page. • Click Target Rules List to show defined blacklists and target categories • Define default user access: select Default access [all] as allow or deny.

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• Define other category actions: • Select —, to ignore a category. • Select allow, to allow this category for clients. • Select deny, to deny this category for clients. • Select white, to allow this category without any restrictions. This option is used for exceptions to prohibited categories. • To prohibit clients from using IP addresses in URLs, check Do Not Allow IP Addresses in URL.

• Select Redirect mode: • Int error page: Use the built-in error page. A custom message may be entered in the Redirect info box below. • Int blank page: Redirect to a blank page • The other options are various redirects to external error pages, and a URL must be entered in the Redirect info box if they are chosen. • Use safe search engine: Protect customers from unwanted search results. It is supported by Google, Yandex, Yahoo, MSN, Live Search. Make sure that these search engines are available. If this protection should be strictly enforced, disable access to all other search engines.