High recursive client counts
jbrandt at fsmail.bradley.edu
Wed Mar 26 12:57:29 UTC 2014
I had it set as:
inspect dns maximum-length 4096
Which is what Cisco recommends. EDNS tests worked fine, but the BIND
servers would still get backed up.
On Wed, Mar 26, 2014 at 7:35 AM, Thom, Paul E <Paul.Thom at ssc-spc.gc.ca>wrote:
> Do you have the FWSM DNS inspection configured to support EDNS. Not
> sure if I have seen ASA / PIX code causing that problem when EDNS support
> was not configured on the firewalls but it's something to look at.
> *From:* bind-users-bounces+paul.thom=dfo-mpo.gc.ca at lists.isc.org [mailto:
> bind-users-bounces+paul.thom=dfo-mpo.gc.ca at lists.isc.org] *On Behalf Of *Jason
> *Sent:* March-26-14 9:09 AM
> *To:* Sam Wilson
> *Cc:* comp-protocols-dns-bind at isc.org
> *Subject:* Re: High recursive client counts
> The code on our FWSMs isn't the latest release, so that could be part of
> the issue, but it's been about 16 hours now since I shut it off, and so far
> so good. I would say though with the other load on our firewalls, it's
> highly possible that they were being overloaded. Unfortunately our MRTG
> isn't setup to track firewall CPU, so I can't say for sure.
> Jason K. Brandt
> Systems Administrator
Jason K. Brandt
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