DNS DoS ???
Elliot Finley
efinley.lists at gmail.com
Fri Jul 29 18:51:05 UTC 2011
my DNS servers were getting slow so I blocked recursive queries for
all but my own network.
Then I was getting so many of these:
ns2 named[5056]: client 78.159.111.190#25345: query (cache)
'isc.org/ANY/IN' denied
that is was still slowing things down. I've since written a script to
watch the log and throw these into the box local firewall. If I
expire the entries after 24 hours then I accumulate about 10200 unique
IPs. If I expire after 48 hours, then it's just over 20000 unique
IPs.
Is anyone else seeing this?
Elliot
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