"Address already in use" error from socket bind, when ports are not being used

Question

I can not bind (using C or python sockets) to any port in the range: 59969-60000

Using lsof, netstat and fuser I do not see any processes using these ports.

Other ports such as 59900-59968 and 60001-60009 I can bind to them.

My OS: is CentOS release 5.5 (Final) 2.6.18-194.3.1.el5

There must be something missing? Anyone have any idea how to debug why this port range is not usable?

Cheers, Ivan

Post the code. Also try "nc -l 60000" to rule out your code. — Mark Wagner, Sep 09 '10 at 22:12
Also look at `netstat -tap` (as root), maybe some other program like inetd or xinetd is listening on ports in that range. — ott--, Jul 02 '12 at 19:04
Should have been placed on stackoverflow. too old to migrate. — hookenz, Apr 17 '13 at 03:49

score 1 · Answer 1 · answered Sep 09 '10 at 21:16

1

I would check local firewall settings. Since iptables is not a separate process it will not usually show up in lsof, netstat, and fuser.
What is the output to "sudo iptables -L -n"?

answered Sep 09 '10 at 21:16

flashnode

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"Address already in use" error from socket bind, when ports are not being used

1 Answers1