2 PC in lan playing with others over internet = DESYNC

That's not a desync--if you were encountering a desync, you'd actually get a message to that effect in the game.

Please post a report from speedtest.net so we can see how much upload bandwidth you have. You may also be encountering a bug where someone shopping or assigning skill points while dead will crash their game and disconnect others, which is solved in the update we plan to release in the next couple of days.

You can call it whatever you want but when you see the player thats in lan with you (who has around 20ms ping to me in game) that lags and he's seeing me lagguing too there is has to be something wrong. We'll often see the timeout timer go up from 6 to 10 sec and then a few to all players leave with the game always ending with the scoreboard. This issue as been repeated 100% of the time in more then 20 games over 2 months. (He just moved in with me recently but we used to bring his computer over to my place)

Also I should add that we are using a wired network and not wireless.

Here is the result from speedtest :

Yeah there is definitely a problem when you play with 2 people behind the same router

I can play with my brothers fine for a random amount of time but usually atleast 20 minutes but after that, one of them ALWAYS gets disconnected, then the game progresses fine when only 1 is left, this has been happening everytime so its pretty consistent.

Im on a 24/2 Mbit's connection and they are on a 10/10 Mbit's full-duplex fiber connection so the bandwidth isn't the issue here either.

The game has yet to crash when i play only with one of my brothers and another friend of mine and we've played well over 10 games at the time of this writing.

So there is definitely something fishy going on when 2 people behind the same router are playing in the same match/game.

edit:

also it should be noted that we only play games against AI, so its either been 3 or 4 players depending on if both my brothers and/or my friends are playing, so bandwidth requirements should definitely be low.

They all have good computers too (Core2Duo 2GB ram is the "worst") so the game is lag/slowdown free until the bug/player drop occurs.

There is a known fix for this in the Problems forum, please look it up, and please post technical problems there, not here.

Seems I had miss the drop list menu for the other demigod forums ...

will try what this post says http://forums.demigodthegame.com/357919 and will report back
thx for pointing me out in the right direction.

we've been able to play one short game of 20 min (then the other team conceded after a ragequit)
so looks like this is fixed.

Btw to the Mods : feel free to move this to the technical forum ...

Are you forwarding ports to each computer properly?

And are you using DIFFERENT ports?  Check that ImpulseReactorOptions.exe program to see.

Frogboy made a post a while back about speed tests - http://forums.demigodthegame.com/352954.  I point this out as you have a low upload speed.  When you have 2 connections going out, you'd logically be utilizing double the bandwidth.  So, I'd wager that is causing your problem.  I'm not sure if the utilzation has been improved since that post, but my guess would be that you could probably pull off a 2v2 on a small map with your current upload speed, but would be unable to do a 5v5 game (as estimated in the post upwards of 20k up... add another player to your network, and now you are over 40k).  I personally think that may be your problem. 

I have had people over and had them connecting to through my network to the internet and played 5v5 games successfully, without them having to configure impulsereactoroptions (though my pc is set up). 

Xmadror - I hope you stop back by this post and provide some extra details... can you and your roommate try a 5v5 game and post if you are still getting disconnected?  And last, are you hosting these games where you lose connectivity or joining someone elses game outside of your network?

0.42Mbps up is ~52KBps.

It's probably a port forwarding issue. Also, the OS may never send the packets out into the network if the IP is identical, and just throw them back to you. Try tracerouting your own Internet IP, and you'll see it never leaves your computer.

My friend plays behind the same router as his brothers as well.  I think changing the impulsreactor.exe file was the solution, gave each computer a set of 20 ports or so, but that may be a bit complicated and not necessary, we're both tech guys so we went for it and seemed to have cleared his system up.

I'm glad people are having success.  So long as it works is an ok motto from time to time!  I decided to play a game and do a test using Netmeter.  No other network activity and a 4v4 game where I wasn't the host.  My max upload during the game peaked at 50.2Kib/s .  I'm a little more attentitive to this stat because 1 of my buddies for some reason can't play 4v4 or 5v5 anymore due to low upload speed after 1.1 (eg, he starts a 3v3 or > game and then gets disconnected, but can play 2v2 without issue all the time).  His issue might be completely unrelated to 1.1, though.  I figured not enough upload speed might be the prob here as well, but it doesn't appear to be.  Glad we have so many people wanting to help in this community!

I've been playing behind the same router as my housemate since beta, you just need to set up port forwarding properly and everything should be dandy.

We've been able to succesfully play 5-6 games with no problem at all up to 4v4 (never really tried 5v5 because it used to lag a lot (even alone) but maybe its playable now ?).

So having different ports in the ImpulseReactorOptions.exe program fixed it!