How to Test Reverse Delegation?

Brad Knowles brad at
Fri Jan 7 08:42:33 UTC 2005

At 5:36 PM -0800 2005-01-06, Will wrote:

>  If we configure the /28 reverse lookup on our DNS, how do I test it?

	You're going to have to be authoritative for those domains.  Set 
up your local caching nameservers to act as secondaries from your 
local authoritative nameservers for those domains.  This way, all 
internal queries for those reverse domains will short-circuit the 
nameservers at your ISP.

	Then the only problem is generating tests from the outside world 
(to make sure that the delegation from your ISP is working).

Brad Knowles, <brad at>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <> for more info.

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