internal Server Error 500

I just set up an apache server on my red hat 7.1 system for fun. I am behind a router so I did the port forwarding of port 80 to the red hat computer.
The problem is, when I try to connect with other computers on the network using my 'outside' ip address I just get a http 500 error. When I try with the outside Ip address with the local machine I get


But on the local machine, when I use http://localhost or http://192.168.1.100 those work (but 192.168.1.100 won't work on a different comptuer on the network)

Anyone know how to fix this, or what I am doing wrong?
This is the first time using apache so I might have missed something.

Well, forget for a moment the whole port forwarding, external access -- your immediate problem lies within the network; more to the point, on that system itself.

A 500 loopback error is usually associated with permissions set incorrectly, or malfunctioning -- perhaps through incorrectly set permissions -- any number of executables.

I would see if you can even connect to the machine from within your network, via telnet or ssh. You should try to telnet to port 80; see if you even connect. Then attempt to fetch content.
Do this after you connect by typing GET /<path to executable> HTTP/1.0
Return, Return.



As an example.

If you can connect to the box via ssh, but not via http (through telnet) then you are looking at server issue, most likely with execute perms.

Cheers.

I can connect through SSH on a different system on the network fine, but I can't connect through telnet, or http, using the 192.168.1.100 address.

I haven't manually changed any permissions, I remember seeing a website saying the permissions you were supposed to change, but I can't remember what what I was supposed to change(and can't find the site again)