The question came up today so wanted to post it here for future reference.
First if you use autorun you need to change it in the appropriate autorun file:
i.e. the majority of MUD's will have to edit the autorun file line 37.
autorun:37:PORT=4000
autorun.cmd:21:PORT=4000
autorun.pl:25:$port = 4000;
autorun.sh:36:PORT=4000
Then go to the src folder and change config.c:
config.c:199:ush_int DFLT_PORT = 4000;
Make clean and then reboot the game and connect.
Rumble
The Builder Academy
tbamud.com 9091
rumble@tbamud.com