Yeah we have all forwarded the ports like some other sites suggested including 6112,9103, and 30350-30351. Although C can't because his brother won't alow him to touch his network since its his.
"A" can connect to everyone.
"C" can connect to everyone.
All other computers CAN connect to each other and A & C with no problems.
A only has a router firewall. I'm not sure about C. Ill have to find out.
After doing some homework I understand that you can only open ports for one IP address on a router? Correct me if this info is wrong though, but, if thats the case maybe since A is 1 of 2 computers behind the router is that screwing thinsg up? And, if it could be, how do I have them set the router up so both can have the ports opened or whatever may may need to be done?
Again, thanks for the reply!
What you have here is a fundamental limitation when using a NAT router and gaming console.
A NAT router allow multiple devices behind the router to share the ONE public IP address made available by your ISP. That works great and without much hassle for traffic headed OUTBOUND from your network. However, when using an Internet gaming console, thereâ€™s always going to be a certain amount of UNSOLICITED traffic from the other gamers in your group. IOW, traffic thatâ€™s initiated from the Internet and INBOUND to your network. But if you have more than one user behind that NAT router, where is the router supposed to forward that traffic? Using your example, should traffic from C be forwarded to A or B? And how can the router differentiate between the two? The problem is, the only differentiating factor is the port(s) and thatâ€™s insufficient information. Of course, it works just fine for a single user since the router just BLINDLY forwards any traffic that appears on those ports to a fixed IP. IOW, if it comes in on port 6112, it must be intended for A. But as soon as you add user B, it becomes ambiguous. Who should it be forwarded to, A or B? Thereâ€™s simply no other information available to disambiguate between them.
In short, most gaming systems donâ€™t support multiple users behind a NAT router, at least not very well. Instead, each user needs a unique public IP. Now any possible ambiguity is eliminated since each user can be differentiated based on that public IP.
The only way youâ€™re going to be able to solve this problem (besides each user having their own public IP) is if the gaming console allowed you to assign ports to individual users. IOW, user A would use ports A, B, and C, while user B uses ports X, Y, and Z. In that way, ambiguity is eliminated based on port usage. But I donâ€™t know of many gaming consoles that work that way. I suppose if each user had their own gaming console and it allowed you to specify alternative ports that would work as well. But here again, most gaming consoles use only a well-known, fixed selection of ports (if they didnâ€™t, it would make it very difficult for others outside your network to find you).
NAT routers and gaming consoles just arenâ€™t a good mix, at least if you need to support multiple users behind any given router.