DNS Master and Slave

[Joe White]

Hi,
I'm building three DNS servers which will be master for three individual domains. Because of limited budget and no other systems to work with I'm being asked if I can also make each of the masters a secondary of the other domains. Is this possible?

[James Specht]

If you don't have a problem with each DNS server carrying all three zones you can do it. Setup all three servers as the master DNS server for all three zones. Pick one server to do your edits on and have a cron job send the updates to the other two servers hourly, daily which ever you feel is needed. This way you have three master DNS servers with no real slaves.

This was just discussed in another thread last week.

[James Specht]

Here is that thread I was talking about.

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=228075

[Joe White]

Thanks for your response James. If I understand you and the other thread correctly, each servers /etc/named.conf would only have a zone specification for the domain the server is master of (no zone entries with 'type' = slave)and I would copy the other domains database entries from /etc/named.data. Correct?

[James Specht · Accepted solution]

Correct. You would still want all three zones in each server though. This way each zone, domain, would be found on any of the three server.

Good Luck!

--Jim

[Geoff Wild]

I would just do what you stated in your question....make each box a "primary" for a zone and make each box a secondary for the other "primary" zones. That will give you the most redundancy.

Rgds...Geoff