Hi Klaus,

On 2013-07-08, at 09:13, Klaus Darilion <klaus.mailingli...@pernau.at> wrote:

> I want to sign a certain zone multiple times: 1x the original zone + 1x a 
> modified "backup" zone (change SOA serial and maybe some other records)

CIRA's signing infrastructure with .CA provides some experience for a somewhat 
similar setup. CIRA uses OpenDNSSEC to manage the key policy, and the 
identities of the keys required to make signature are extracted from the live 
policy in order to do their parallel signing with BIND9 (they sign with 
multiple signers and compare the results before publication).

You could do similar -- extract the key identities from ODS, modify the 
unsigned zone automagically to your requirements and use the BIND9 tools to 
sign it with the appropriate keys.

In addition to whatever risks you are mitigating by having the standby signed 
zone ready for publication, this would also give you an independent 
implementation (so, e.g., if there ever turns out to be a problem in the ODS 
signer you have an independently-signed zone to give you some extra comfort).


Joe

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