Blocking Web Sites

Configuration guides, troubleshooting and practical advice for AZTCOFW.

Articles

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Prevent Bypassing Restrictions

With any of the above methods, there are many ways to get around the defined blocks. The easiest and likely most prevalent is using any number of proxy websites. Finding and blocking all of these individually and keeping

Using a Proxy

If web traffic flows through a proxy server, that proxy server can likely be used to prevent access to such sites. For example, Squid has an add-on called SquidGuard which allows for blocking web sites by URL or other si

Using DNS

If the built in DNS Resolver or Forwarder are active an override can be entered there to resolve the unwanted website to an invalid IP address such as 127.0.0.1. With the DNS Resolver, additional methods are possible via

Using Firewall Rules

If a website rarely changes IP addresses, access to it can be blocked using an alias containing its IP addresses and then using this alias in firewall rules. Warning: This is not a feasible solution for sites that return