Tobias J Kreidl wrote:
>If you have access to the DNS server(s), you can always set the TTL down
>to 5 minutes or so, if that cached value is a problem, and once clear,
>set it back up to a reasonable value.

He won't have access to the servers running the blacklist domain. But 
if he has control over the local caching resolver he's using then he 
can flush the cache in that (rndc flush) which would have the desired 
effect.

BTW - lowering the TTL after someone has cached the results of a 
lookup won't help. Their cache will just return the cached entry 
until the TTL in effect when it was looked up expires - it will only 
then do another lookup and get the new TTL.

-- 
Simon Hobson

WANTED: "Software CD ROM Kit" for Canon CLBP 360-PS printer (Canon 
part no RH6-3612, or possibly RH6-3810, or RH6-3610 might do). I've a 
dead HD and need this CD so I can replace the disk and re-install the 
printer OS on it.
This is NOT the same thing as the printer drivers to load on the 
computer - there's no problem there.
If anyone knows where I might get hold of one I'd be grateful - 
requests to Canon drew a blank, it's been out of support for years.
Alternatively, if anyone has one of these and would let me image 
their hard disk ...

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.
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