Solo mine wallet behind nat - max connections?

[Jriker1]

Trying to solo mine Megacoin. Have the latest wallet setup and running on port 7950. I have a number of remote computers mining. Computers are behind NAT but pool mine the same coin on the same port all day. Computer wallet is on a separate network also behind separate NAT and port 7950 routed to it on the router.

I have two computer solo mining both gpus and CPU to the wallet. Have one other CPU mining on another computer. My other three computers can't connect but ping the URL. They just fail connecting and exit in cgminer. Thoughts what's up here?  Can mine all day against a pool on all computers.

I have set the allowed ip to *.*.*.* for testing and max connections put like 200.

Thoughts?

Thanks.

JR