1. Can you access the site by typing in the IP address directly?
If not, you have bigger problems.
2. Try adding the server's IP address and name to the /etc/hosts file.
(Do this in the terminal with 'sudo pico /etc/hosts', or with BBEdit).
Ignore what the file says about being used only in single-user mode -- that was true in 10.1, but the file is used in 10.2.
(If the file does not seem to be being used, make sure 'BSD Configuration Files' is enabled in the Directory Access application, in the Utilities folder).