Be sure that you have ProxyRequests Off specified, with <Proxy [asterisk]> deny from all (or allowing just as needed). E.g. in Ubuntu, make SURE you link to

Be sure that you have ProxyRequests Off specified, with <Proxy [asterisk]> deny from all (or allowing just as needed). E.g. in Ubuntu, make SURE you link to proxy.conf from mods-enabled, because Apache has a horrendous bug where if it doesn't see that option in a config file it defaults to ON. Which means people can joy-ride using your server as an open proxy. I don't know what possessed them to make that an opt-OUT. <Proxy *> -- news. yc markup bug, can't specify a single asterisk if italic markup follows.