Red Hat up2date can stop email on name servers

[Dave Filchak]

Thanks for this.

Dave

Steve Swaney wrote:

>Red Hat recently released Red Hat Enterprise Linux 3 Update 4. We have seen
>this update stop mail flow at several client sites on the email gateways
>that are also running DNS named services.
>
>If you are NOT running the named server, you should be able to run up2date
>without problems.
>
>If you are running the named services:
>
>What we have seen is that installing these updates may cause named to fail
>during the update. Here are the symptoms. At or near the end of the update
>you will see:
>
>..
>
>117:gimp-print             ###########################################
>[100%]
> 118:redhat-config-printer  ###########################################
>[100%
>https://xmlrpc.rhn.redhat.com/XMLRPC
>https://xmlrpc.rhn.redhat.com/XMLRPC
>https://xmlrpc.rhn.redhat.com/XMLRPC
>https://xmlrpc.rhn.redhat.com/XMLRPC
>https://xmlrpc.rhn.redhat.com/XMLRPC
>
>And the connection to the Red Hat up2date server fails. We believe this is
>because the named service is killed by the up2date process. To correct this
>error, first restart named:
>
>service named restart
>
>And this is a bit ugly, up2date seems to alter the system configuration to
>NOT run named on boot. To make sure that named is configured to start at
>boot, run:
>            chkconfig named on
>
>And we saw on one system that nscd was incorrectly configured to start on
>boot. to make sure that nscd is not configured to start at boot time, run:
>
>            chkconfig nscd off
>
>And finally restart up2date:
>
>      up2date -u
>
>If up2date has any work yet to finish, it should complete normally.
>
>Have a happy holidays Be careful out there,
>
>Steve
>Steve Swaney
>President
>Fortress Systems Ltd.
>www.fsl.com
>steve.swaney at fsl.com
>
>
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