I have a quake 1 server installed and running, but i can't use for network games. Here is what I get when the option -noudp isn't used

[root@p4r14h quakeserver]# ./unixded
Unix Dedicated Quake Server -- Version 1.000
Added packfile ./id1/pak0.pak (339 files)
Added packfile ./id1/pak1.pak (85 files)
Added packfile ./id1/pak2.pak (10 files)
Added packfile ./id1/pak3.pak (192 files)
PackFile: ./id1/pak1.pak : gfx/pop.lmp
Playing registered version.
PackFile: ./id1/pak0.pak : gfx.wad
Console initialized.
Segmentation fault (core dumped)
[root@p4r14h quakeserver]#

In the readme it says to check /etc/hosts to make sure there is an entry there for localhost 127.0.0.1 and it is there and everything. I don't know why UDP would cause it to core dump :S

Try ktrace'ing the process to see where it's dying. Read the man page for ktrace. Just be aware that running ktrace on a process will write to a dump file. You then have to run kdump to read it. Also note that you must explicitly stop the trace, or you will fill your disk quite quickly.