RE: DNS ACL ?

["Giancarlo Paolillo" <gpaolillo () earthlink net>]

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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Hackers are concentrating their efforts on attacking applications on your 
website. Up to 75% of cyber attacks are launched on shopping carts, forms, 
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to SQL injection, Cross site scripting and other web attacks before hackers do! 
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