QUOTE(Heimdall @ Oct 16 2010, 10:18 PM)

That might have something to do with you posting in completely the wrong place - this has nothing at all to do with "Technical Onboard Bios / Kernel / Dashboard Forum".
Get the basics sorted - until you can ping from the PC to the Xbox you won't get any further.
The direct connection isn't working because you probably haven't manually set the correct IP address in your PC. So, connect the PC to the Xbox via the crossover cable. Set the IP address of the Xbox to 192.168.1.100, and your PC to 192.168.1.101, both with subnet mask 255.255.255.0. Disable your PC firewall, and any other security software (e.g. your AV). Disable your PC wireless card to ensure that it doesn't get in the way, then try pinging from the PC to the Xbox i.e. "ping 192.168.1.100". If it doesn't work, try changing the sharing options, then repeat.
Once that works, post back here - hopefully by that time a moderator will have moved this to a more suitable forum.
Oh, and unless you have a massively complex network you don't need to forward any ports - the router only routes to the WAN (ISP) port, and both of your devices are on the LAN side of the router.
Sorry for the delay, I had to carry the PC downstairs and set it back up.
I attached the computer to the xbox and set the xbox ip to 192.16.1.100, subnet mask 255.255.255.0 default gateway to 192.168.1.1 (won't let me set to 0.0.0.0). Then I disabled my Antivirus and wireless card on the PC, under properties in local area connection 2 I set the PC ip address to 192.168.1.101, subnet 255.255.255.0, default gateway 192.168.1.1
The local area connection2 shows up as Unidentified Network, shared. Activity shows 10,652 bytes sent and 7,750 bytes received.
When I ping 192.168.1.100 from the PC, it still times out. I tried using another ethernet cable, and that did not fix the problem.
Edit: I connected the PC to the router using Local Area Connection 1, then connected the xbox to the router. Then I pinged the xbox and 1 packet went through time<1ms
I pinged again and all 4 timed out.
Edit2: It appears my laptop is automatically being assigned the IP 192.168.1.101
When I try to change it to something else (like 192.168.1.102) I lose internet connection.
In fact for my PC when I try to assign a static IP I lose internet connection as well. I must be doing something wrong by setting gateway to 192.168.1.1 and preferred dns to 192.168.1.1
Edit 3:
I've tried everything I can think of, including rebooting the computer, and I can't get internet access with a static IP address. The automatically assigned IP addresses are:
Laptop 192.168.1.101
PC 192.168.1.136
Xbox 192.168.1.115
I need internet access on the laptop to see this thread. I need the laptop to have a static IP to get it off 192.168.1.101 to test the PC->Xbox connection Heimdall mentioned without IP conflict.
This post has been edited by franksinatrall: Oct 17 2010, 12:12 AM