IXFR client tools

Mark_Andrews at isc.org Mark_Andrews at isc.org
Wed Dec 11 10:09:00 UTC 2002

> Does anyone know of any tools to make dynamic updates to a zone that 
> could be scripted?  I'm thinking about DNS blacklists and how much of a 
> waste of resources it is to transfer a large zone every time there is an 
> update (or a literal copy of the zone a couple times a day).  The 
> obvious solution is IXFR transfers.  I don't know of any tools that can 
> make dynamic updates that could be scripted however.
> I was getting a AXFR transfer of a large DNSBL up until a few weeks ago 
> when the server disallowed transfers (probably because of the resources 
> it consumes).  I pass it internally to my other DNS boxes so as to not 
> waste more of that server's bandwidth.  I recently had to resort to 
> literal copying of the zone when commanded.  That works but it consumes 
> almost as much resources as the full zone transfer (consumes less 
> because it isn't done with each change, only when commanded).
> If there was a simple CLI tool to make dynamic changes to master with 
> scripts, it would be possible to use IXFR to only transfer the changes, 
> saving resources on the master, resources on the primary slaves, and 
> resources down at the slave level my servers are at.  The dynamic update 
> tool is the key as best I can tell.  Does anyone know of any or have any 
> other suggestions?  I don't run a DNS blacklist so I don't know if this 
> is even feasible or possible.  It seems logical though.
> J


Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org

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