Hi,
I have a single-instance L4D server (no forks) running on a specific IP
address. When the server first started it bound to the normal ports
(TCP 27015, and UDP 27005, 27015, 27020) and not much else. But after
running for a few days, it's now bound to 47 UDP ports:
$ netstat -an | grep <IP ADDRESS>
tcp 0 0 <IP ADDRESS>:27015 0.0.0.0:*
LISTEN
udp 424 0 <IP ADDRESS>:27015 0.0.0.0:*
udp 0 0 <IP ADDRESS>:27020 0.0.0.0:*
udp 14656 0 <IP ADDRESS>:26901 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26902 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26903 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26904 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26905 0.0.0.0:*
udp 296 0 <IP ADDRESS>:26906 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26907 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26908 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26909 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26910 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26911 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26912 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26913 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26914 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26915 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26916 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26917 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26918 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26919 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26920 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26921 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26922 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26923 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26924 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26925 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26926 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26927 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26928 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26929 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26930 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26931 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26932 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26933 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26934 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26935 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26936 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26937 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26938 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26939 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26940 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26941 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26942 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26943 0.0.0.0:*
udp 0 0 <IP ADDRESS>:26944 0.0.0.0:*
udp 0 0 <IP ADDRESS>:27005 0.0.0.0:*
Server appears to still be working just fine, but is this normal for a
single, non-forked, no-frills server? All but the standard ports are
blocked by our firewall so they can't be connected to anyway.
I started another vanilla server last night on the same box using a
different IP address and it is only using the expected ports:
$ netstat -an | grep <IP ADDRESS 2>
tcp 0 0 <IP ADDRESS 2>:27015 0.0.0.0:*
LISTEN
udp 0 0 <IP ADDRESS 2>:27015 0.0.0.0:*
udp 0 0 <IP ADDRESS 2>:27020 0.0.0.0:*
udp 0 0 <IP ADDRESS 2>:26901 0.0.0.0:*
udp 0 0 <IP ADDRESS 2>:27005 0.0.0.0:*
Any ideas or suggestions? OS is CentOS 5.2 (32-bit).
Thanks,
Dave
--
Dave Parker
Utica College
Integrated Information Technology Services
(315) 792-3229
Registered Linux User #408177
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