incoming tcp query

Mike Hoskins (michoski) michoski at cisco.com
Tue Feb 24 19:51:42 UTC 2015


The answer is BIND does accept TCP queries by default (it's required to be
RFC compliant), but a lot of times upstream firewalls/ACLs/etc block TCP,
munge UDP packet size, etc...  Just firing up BIND with basic
configuration and checking netstat will show you TCP 53 listening.  If
it's not working as expected, you often have to start walking up (or down
as it were) the stack and potentially working with other folks to fix the
problem.

-----Original Message-----
From: Shuangrong <wushuangrong at yahoo.com>
Date: Saturday, February 21, 2015 at 11:08 PM
To: "bind-users at lists.isc.org" <bind-users at lists.isc.org>
Subject: incoming tcp query

>Hello,
>
>Does Bind accept tcp incoming query by default? Or is there any options
>to enable this feature?
>
>
>Regards,
>Shuangrong
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