Zandronum

hey i have problems with zandronum coz i can create a server but don't appear in the master server list.
the problem I have since skulltag.
the firewall turn it off and nothing

help :c

You need to port forward the port that Skulltag/Zandronum uses.
It uses 10666 by default.
Look in this list and find your router name to learn how.