finally it work !! , to reach it remind that on windows server ->
my goal is to run a second server with Port 7778 and queryPort=27020
Modify ports.bat script located in the longvinter server folder ->
netsh advfirewall firewall add rule name=“LongvinterServer UDP” dir=in action=allow protocol=UDP localport=7787,27020,27021
netsh advfirewall firewall add rule name=“LongvinterServer UDP” dir=out action=allow protocol=UDP localport=7778,27020,27021
netsh advfirewall firewall add rule name=“LongvinterServer TCP” dir=in action=allow protocol=TCP localport=27020,27021
netsh advfirewall firewall add rule name=“LongvinterServer TCP” dir=out action=allow protocol=TCP localport=27020,27021
Run this script IN ELEVATED PRIVILEGE !!! (admin)
Perform NAT redirection in your Firewall to your “new” port ->
Longvinter2 sourceport=7778 destport=7778 IPredirect=yourserverIP
Longvinter2 sourceport=27020-27021 destport=27020-27021 IPredirect=yourlocalserverIP (ex 192.168.1.3)
Launch the server with a shortcut and add this parameter after -log -Port=7778 -QueryPort=27020 (port can be modified)
Ex; “c:\longvinter\longvinter.exe -log -Port=7778 -QueryPort=27020”
And “Voila” it work perfectly
I can make a better procedure with screenshot if you want to add to official documentation.