What common service port does SRB2 use

what common service port does it use HTTP, DNS, FTP, NNTP, SOCK, etc

UDP port 5029 by default
see https://wiki.srb2.org/wiki/Multiplayer#Hosting

You can change the port number at startup, see https://wiki.srb2.org/wiki/Command_line_parameters#Networking

i ment the common service port like what i said above not the udp port

KitKatiscool said:

i ment the common service port like what i said above not the udp port

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Well, is it possible you're talking about the MS address?
If so, that is HTTP/HTTPS.

from https://github.com/STJr/SRB2/blob/master/src/i_tcp.c
SRB2 main network code will host and connect to UDP port 5029 by default, but can connect to other UDP port numbers

from https://github.com/STJr/SRB2/blob/master/libs/miniupnpc/miniupnpc.c
SRB2 UPnP sub code may use HTTPU over UDP Port 1990 at [FF02::C], [FF05::C] and/or 239.255.255.250 to ask the internet router to port forward UDP traffic to your host, for hosting netgames, which is by default is UDP port 5029

from https://github.com/STJr/SRB2/blob/master/libs/curl/include/curl/curl.h
the MasterServer uses libcurl to talk to the MasterServer via HTTPS over port 443 by default
it can also do HTTP or HTTPS over any TCP port number