We just figured out that somewhere along the line, we broke automatic proxy configuration stuff. To fix it there are a couple of things we can do. First we added this to our /etc/dhcpd.conf file:
option WPAD code 252 = string;
option WPAD “http://www.gac.edu/cgi-bin/proxies”;
In our old config we had option option-252 “http://www.gac.edu/cgi-bin/proxies”; but that just gave us an error about option-252 unknown.
To make Firefox’s auto config work, we had to make sure we had wpad.domain defined for all of our subdomains such as wpad.it.gac.edu, wpad.res-hall.gac.edu, etc. all pointing to our real, wpad.gac.edu.
Hopefully this will help our bandwith usage a bit.