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I would like to know how files are handled in a auto-dnssec environment.

My current setup (non-DNSSEC) places the zones files in /var/named/data. These files are then read by the bind server.

If I enable auto signing, will the zones files change? Or will bind just keep the signed zones internally? If the former thing happens, Puppet might not be a good idea to deploy dns zones anymore.

  • serverfault.com/questions/405528/… – NickW Feb 17 '14 at 16:49
  • @NickW That question doesn't really address what Karlo is asking - he's actually concerned about "all the details" (like what happens on the filesystem). – voretaq7 Feb 17 '14 at 16:52
  • @NickW Additionally, that question is about manually signing zones. In 9.8.something they added the ability for BIND to automatically sign zones, which is what this questions is asking about. – Chris S Feb 17 '14 at 16:56
  • So, what am I missing in this statement here "auto-dnssec maintain tells bind to periodically search the folder, specified in key-directory, for new DNSSEC keys, add those keys to the zone and sign the zone. All automatically, without your interaction." From the page I linked mind you – NickW Feb 17 '14 at 16:58
  • Anyhow, if he wants to use puppet to deploy zone files, he'll probably want inline-signing, and bind 9.9.x.. – NickW Feb 17 '14 at 17:09
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EDIT: The previous version of this Answer was backwards-wrong.

If I enable auto-signing, will the zones files change?

Yes. BIND will update the file you specify in the configuration "dynamic" style. This means the whole file generally gets rewritten, losing any "$INCLUDE" directives, converting to "standard" formatting, etc.

With manually signing files, the original zone files do not change. You can not use Dynamic Updates with manually signed files, so there's a trade-off. Generally you either maintain the original zone file by hand and use manual signing, or you use nsupdate to maintain the original file and let BIND auto-sign the zone. Side note: last I looked BIND couldn't auto-gen ZSK keys, so you still have to manually rotate those (or script the process).

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You an do the latter (having BIND maintain the signed zones separate from the unsigned zones you edit, and also update them when you edit your files) using the inline-signing feature added in BIND9.9.

It is currently only documented at https://kb.isc.org/article/AA-00626/0/Inline-Signing-in-ISC-BIND-9.9.0-Examples.html

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