Hi John,
Correct, 53/UDP is used for DNS Queries and 53/TCP is used for Zone
transfers yet it's not always like this
MS uses 53/TCP for queries as well, but mainly the UDP is used for
queries
Thanks
-----Original Message-----
From: John Hally [mailto:JHally@epnet.com]
Sent: Friday, November 11, 2005 3:35 PM
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
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to SQL injection, Cross site scripting and other web attacks before hackers do!
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