Try:
If you are having issues connecting to your ticketing web site while inside the office and are receiving timeouts, this is often resolved by editing the hosts file on each machine or adding an internal DNS entry to point to your ticketing web site.
Mac's are not usually subjected to this issue. PC's inside the office frequently are because they do not always seem to be able to resolve the DNS that goes outside the firewall and back in, so you have to edit the hosts file to tell the PC how to find the web site.