This aint a BF3 or BF4 issue, this is a router/router config issue. Have fixed this for a couple of my mates already. Don't understand why this works but it has for me so hope fully it will for you. So here is what i did.
I accessed the router and set up static ip address's for each of the connected devices using their mac address. So everytime that computer/console links in with the configured router it will always get that ip address and it means that you can bring your console/pc to a mates house and it won't have to fiddle with things to get it to work again.
Then I assigned a seperate IP range to each device.
Then I restarted the router.
Then hopefully go and enjoy shooting your freinds in the head.
And thats it, each router out there is different so you will have to go through their support site attempting to figure out how to do this. Handy little referance site for this sort of thing is portforward: http://portforward.com/
This fix should work for consoles and pc's, as thats what was in the 2 mates houses where i did this. ( if the more technical minded people out there wish to tear the post apart please do)
Time for my Bacon Sandwich 🙂
ok ..i have same problem and have tried all fixes above to no avail.However i have noticed that this problem only happens on SOME server, some connect 2/3/4/ machins no problem...i am not trying to boost this server as i dont even know who's or where it is ,but it allows more than one pc ..try it for connection purposes...#1-=[Rageplace]=-Caspian Only 1200 Tickets by Gamed.de,,after trying several servers i have come to the conclusion this is a server side problem..
I have reset all changes back to default and still able to connect 2+pc's to above server and others ,,trial and error but there are many servers that will accept 2 + machines
hope this helps
