I'm told its possible.
But I've never had any luck.
I can set router to different ports 21000 for one dedi 4.09, and 22000 4.10.
And I totally over killed the ip stuff in the second server
conf.ini to correspond.
[NET]
speed=10000
localPort=22000
localHost=173.30.250.201
remoteHost=
remotePort=22000
[game]
Intro=0
confc.ini
[il2_console]
title=IL2-CONSOLE
[NET]
localHost=
[Console]
IP=22000
HISTORY=128
HISTORYCMD=128
LOG=0
LOGTIME=0
LOGFILE=logc.lst
LOGKEEP=0
confs.ini
[NET]
speed=5000
serverChannels=16
localPort=22000
SkinDownload=1
difficulty=530576895
Bother servers will run but the 4.09 at 21000 is the only one the reaches out past the router.
The 4.10 server I can fly on from internal ip's.
If I flop the ports on servers the 21000 server no matter the version reaches out.
And when I join the 22000 server internally, it shows I'm joining via 21000
Any help appreciated.