[Help] 2 Computers from same network joining same room

Scratching my head a bit on this one. Tried to play a game with a friend ([rks]poppuyo) who is on the same network today (behind the same router with the same externally resolved IP address). Hosted through the ZK GUI with Nightwatch managing the room. At first, neither of us could connect. I found this in the infolog:


[f=-000001] [CPreGame] using client IP 37.59.49.101 and port 8469
[f=-000001] [LuaSocket] Error: Rule already exists: 37.59.49.101 8469
[f=-000001] [NetProto::InitClient] connecting to IP 37.59.49.101 on port 8469 using name [rks]N2maniac
[f=-000001] [SpringApp::Reload][13] reloadCount=2



[f=-000001] [LuaMenuController::Activate(msg="[PreGame] Server Connection Timeout")] luaMenu=07687108
(So it looks like it just timed out)

There was an interesting message from Nightwatch:
"these people are in the same location:"

Testing a bit more, connecting one computer through a VPN it connected fine. Trying to connect without the VPN to any game at that point failed. Single player (offline) works fine on both.

I am left with one of 2 conclusions. Either
1) somehow we have managed to block this traffic at the router, or
2) there is an IP ban

I have found no references suggesting a problem with #2, so the questions I would have are:
-Is there a problem connecting from the same network we should be aware of?
-Could something else be causing this that someone is aware of?

I am unaware of anything resembling an IP ban affecting either of you, and the "same location" message shouldn't be anything more than a notification. Can you upload the entire infolog somewhere and link it?

So I figured it out - I had a geoIP filter, turns out 37.59.49.101 is in France, which wasn't on the whitelist at the time. False alarm, sorry for the confusion!

As my friend pointed out to me separately... I wasn't IP banned by the game, I IP banned the game.