<div class="gmail_quote">On Wed, Jan 27, 2010 at 9:41 AM, Gottschalk, David <span dir="ltr"><<a href="mailto:dgottsc@emory.edu">dgottsc@emory.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Does anyone here use Bind to cache DNS lookups on their MailScanner boxes?<br>
<br>
I have a bind caching server running on each of my MailScanner machines, and occasionally named will completely freeze up. I'm not sure why this is occurring. I thought it might have had to do with SpamHaus lookups hanging (they blocked our lookups), so I disabled them in my <a href="http://mailscanner.cf" target="_blank">mailscanner.cf</a>; however, that has not resolved the issue.<br>
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I'm running version 9.2.4.<br></blockquote><div><br>Hi David,<br><br>Are you blocking UDP:53 or TCP:53 with your iptables or upstream? Do
any lookups work at all when its frozen (cached or other)? Can you perform lookups using
other name servers from the machine? (eg. dig @<a href="http://bitsy.mit.edu">bitsy.mit.edu</a>
<a href="http://emory.edu">emory.edu</a>). When it is frozen what does the output of lsof look like
for that process? Are there a lot of network resources in use by the
named process when it freezes?<br><br></div></div>-- <br>Landon Stewart <<a href="mailto:LStewart@SUPERB.NET">LStewart@SUPERB.NET</a>><br>SuperbHosting.Net by Superb Internet Corp.<br>Toll Free (US/Canada): 888-354-6128 x 4199<br>
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