e2guardian is a content filtering proxy that works in conjunction with another caching proxy such as Squid or Oops. More information can be found in the e2guardian(8) man page, the "doc" subdirectory of the distribution, and the comments in the configuration and list files themselves. e2guardian is a fork of DansGuardian and the maintainers fully acknowledge the work carried out by and the copyright of Daniel Baron and other contributors to the DansGuardian project. Please note that version 5 is not backward compatible with v4 (and earlier) configuration files.