I think you mean packets over 512
But you should really further lock down your named.conf to allow only
certain systems to perform zone transfers.
May want to look at TSIG (Transaction Signatures) between DBS name
servers.
If you can, look at the more recent versions which have additional
security features (9.1 and above. 9.3.1 is already out with DNSSEC, etc.
-----Original Message-----
From: John Hally [mailto:JHally@epnet.com]
Sent: Friday, November 11, 2005 8:35 AM
To: 'pen-test@securityfocus.com'
Subject: DNS ACL ?
Hello All,
I need a sanity check regarding DNS ACLs. For external facing DNS
servers
you need to allow only udp/53 inbound, correct? I know tcp/53 is used
for
zone transfers and requests/replies greater than a certain size, but
they
shouldn't typically happen for general dns queries correct?
Thanks in advance!
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