Server help

I set up an apache http server. Everything is working fine on my computer and the computer downstairs. I set up a dot.tk domain for it also, which is www.endofrealm.tk. I directed it to my server name mycomputer.gateway.2wire.net and its working fine on my computer and the downstairs one. However, when I try to go on my site from the school, (they use novell) I get a page that displays a "502 bad gateway" error. Now my question is, why does the page display this and if possible how can I correct this. Also let me know if you can access the site. Thanks.
P.S. im a newb to this forum

This doesn't appear to be a DNS related problem. The domain resolves to the server that you've setup a URL redirect on. The URL redirect target is "thecomputer.gateway.2wire.net" which doesn't access any website at all. So either you've misconfigured the URL redirect or you've got a webserver issue.

Then where can I find out my server name in apache? I'm sorry I'm very new to this and I looked at tons of apache guides already.

You're not asking the right questions. But to answer the right question, you need to remove the URL redirect completely. Make the domain point directly to your webserver IP address. If your webserver is on your home computer, then go to www.whatismyip.com to get your IP address. Then go to the place where you setup the URL redirect and point your domain to your IP directly.