Unable to connect multiple LAN players

Problem: **Four or more Internet connected Local Area Network (LAN) players behind a router (thus having the same IP address) are unable to reliably play together using the FAF client.**

Two problems
1. FAF client chat, the fourth player gets “Fix session limit exceeded” limitation of a maximum 3 players from one IP prevents LAN party playing FAF. This part of the problem is also noted here: Problem noted by another person in 2012: https://forums.faforever.com/viewtopic.php?f=26&t=2138
2. Unable to reliably get everyone into the game. Typically the fourth player is able to see the game, connect in, see the game lobby screen, then a second later is kicked out with “disconnected by host”. In the 12 hours of trying to play, we only had a 2-3 games where were all able to play together.

**Why important:** This was a big impact to me because I arranged for my family and friends to get together to play. We all met at my Dad’s place, we bought copies of FA so new people could join. Then it was a big letdown due to multiple problems trying to connect into a game. I’m interested in this fix and would be willing to fund the community further to encourage the fix, thanks playername: defdefiant

**Suggested Analysis**
1) Could we adjust the IRC limit to a higher number such as 8 or 12?
2) Would the game logs provide more info? Occurred between 2017-06-17@2100 GMT through to 2018-06-18@1000 GMT with players: coreenterprise, earthless1324, fay, and silverspark.

**Details**
- Everyone had a full version of the game (2 from steam, 2 not from steam)
- Everyone had the latest version of the standard FAF client from Forged.Alliance.Forever-0.12.4-win32.msi
- Everyone granted the client private and public network protocol support.
- Everyone can host a FAF game through the lobby fine on their own.
- Everyone was able to play together at one point or another (either by having not all players in or in the small number of cases all together)
- Games were standard FAF, no special mods
- The network we were using had no other apparent issues. For example everyone was able to play Overwatch together, web browse, etc.. The connection was high bandwidth cable.
- Occurred between 2017-06-17@2100 GMT through to 2018-06-18@1000 GMT
- Contact me if I can help fund the fix of this problem.

Thank you,
playername: defdefiant
[forever.log.txt](https://github.com/FAForever/client/files/1093525/forever.log.txt)
[game.log.txt](https://github.com/FAForever/client/files/1093526/game.log.txt)