--On Friday, January 04, 2008 16:25:42 -0700 Andrew Falanga
<[EMAIL PROTECTED]> wrote:
On Wednesday 02 January 2008 14:18:53 Derek Ragona wrote:
At 03:03 PM 1/2/2008, Andrew Falanga wrote:
> > While you think there is nothing on that port something is running not
> > letting that socket connection. Try rebooting the system and see if
> > the problem is still there.
> >
> > -Derek
>
> I did try that too. Didn't work.
Have you tried telnet to the IP and port 25? If it is sendmail, you can
see that from the banner, also you can watch the maillog file in /var/log.
I suspect you have another process tying up that port.
-Derek
The problem seems to be sendmail itself. Here's what I've done to isolate
the problem.
1) changed /etc/rc.conf to NOT start sendmail or anything mail related
-- sendmail (external stuff, the local daemon still starts in
/etc/defaults/rc.conf)
-- dovecot
-- saslauthd
I know that saslauthd isn't exactly mail related but I installed it for
sendmail
2) rebooted the computer (and verified that it did actually reboot by using
uptime). I'm not sitting in front of this computer, I'm "ssh-ing" into it.
3) once restarted, I wrote a little C program to open a socket and then bind
the ip address 192.168.2.23 (the machines IP) and port 25 to that socket.
The effectiveness of this program was verified using sockstat. If necessary,
I will post the source code, but didn't see much need to now. The program
worked and the bind(2) call made no complaints.
4) Stopped ALL sendmail processes (/etc/rc.d/sendmail stop)
5) edited /etc/rc.conf and re-enabled the "external" sendmail process
6) Started sendmail and now see the exact same problems in /var/log/maillog:
see below
Jan 4 17:36:42 whitbap sm-mta[975]: starting daemon (8.13.8):
[EMAIL PROTECTED]:30:00
Jan 4 17:36:42 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:36:42 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:36:42 whitbap sm-msp-queue[979]: starting daemon (8.13.8):
[EMAIL PROTECTED]:30:00
Jan 4 17:36:42 whitbap sm-mta[978]: m010sNBM004564:
to=<[EMAIL PROTECTED]>, delay=3+23:42:19, xdelay=00:00:00,
mailer=esmtp, pri=2555114, relay=mail02.interchangeusa.com. [63.251.210.81],
dsn=4.0.0, stat=Deferred: Connection refused by mail02.interchangeusa.com.
Jan 4 17:36:47 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:36:47 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:36:52 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:36:52 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:36:57 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:36:57 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:37:02 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:37:02 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:37:07 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:37:07 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:37:12 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:37:12 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:37:17 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:37:17 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:37:22 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:37:22 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:37:27 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:37:27 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:37:32 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: cannot bind: Address already in use
Jan 4 17:37:32 whitbap sm-mta[975]: daemon MTA: problem creating SMTP socket
Jan 4 17:37:32 whitbap sm-mta[975]: NOQUEUE: SYSERR(root): opendaemonsocket:
daemon MTA: server SMTP socket wedged: exiting
What does one do when sendmail is it's own worst enemy?
Any help is greatly appreciated because I don't understand at all what I
could have done to this. If necessary, I'll post my <hostname>.mc file for
all to read. Heck, I'll post whatever is necessary because this has to be
working.
With sendmail generating the errors above, post the results of this:
# sockstat | grep ":25"
--
Paul Schmehl ([EMAIL PROTECTED])
Senior Information Security Analyst
The University of Texas at Dallas
http://www.utdallas.edu/ir/security/
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