Dansguardian is a Web content filter, which works as an HTTP Proxy.
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This patch allows to specify Dansguardian’s parent proxy with a
DNS name, while the original Dansguardian code only accepts IP addresses. Using a
DNS name makes proxy load balancing much easier, but it increases the amount of
DNS lookups significantly. Thus, a local
DNS cache is strongly recommended, e.g. use lwresd from the Bind package.