tim at icukhosting
Jul 1, 2009, 7:39 AM
Views: 738
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Hi,
Does anyone know why tcpserver would, after running with the same
configuration for 2 years, suddenly hang on every connection when
listening on a private IP address, unless the -l option was specified?
We have tcpserver running on a 10 node cluster of qmail machines, with
the below:
tcpserver -R -H -v -p -x /var/qmail/tcp.smtp.cdb -c "$MAXSMTPD" \
-u "$QMAILDUID" -g "$NOFILESGID" 192.168.2.11 smtp qmail-smtpd \
checkpassword true 2>&1 5>&1 4>&1
The system has been running almost flawlessly for close to 2 years, and
no changes have been made to the configuration, the local network, the
local nameservers, or anything in the data centre.
Adding -l 0 to the command instantly resolved the problem, but what we
can't understand, is why tcpserver would stop accepting the NXDOMAIN
responses when trying to query the private IP and hang, after being
seemingly happy with them up until now!
Any insight into what might have caused this would be greatly appreciated.
Thanks,
Tim
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Odd tcpserver issue
