Need to reconfigure the dnscache IP's

tonyawbrey · Post by **tonyawbrey** » Thu Feb 12, 2015 3:48 pm

I changed the configuration of our internal network and need to reconfigure the dnscache IP's, I have searched and searched and cannot figure out how to do this. Any help would be greatly appreciated.

Thanks!

ninjavz · Post by **ninjavz** » Fri May 15, 2015 10:20 am

I have a similar problem. DNSCache seems to copy lookups from an outside DNS Server, so when it resolves the server address we get the public IP, but we need it to resolve to the internal with our own DNS Servers. Without this, a lot of mail gets deferred.
Is there a way to tell DNSCache where to get its IPs (which DNSs to use)? /etc/resolv.conf?

jorgedlcruz · Post by **jorgedlcruz** » Fri May 15, 2015 11:07 am

Hi ninjavz,
In the next Config Guide, you can search by dns - https://files.zimbra.com/docs/config-guide/index.html
And you will obtain the next, pay attention to the value zimbraDNSMasterIP, so you need to play with it, in the same Config Guide you can select more Columns to see better info.

The proper values are:
zmprov ms `zmhostname` +zimbraDNSMasterIP 8.8.8.8
Or if you want to remove some old DNS server:
zmprov ms `zmhostname` -zimbraDNSMasterIP OLDIPDNSSERVER
Best regards

ninjavz · Post by **ninjavz** » Fri May 15, 2015 11:27 am

Great info.

Just one more thing before testing, I would like to know the current DNSMasterIP, how can I see that?

Regards

ninjavz · Post by **ninjavz** » Fri May 15, 2015 1:48 pm

Will reply myself since I found it:

# su - zimbra

$ zmprov getServer `zmhostname` | grep DNSMasterIP

jorgedlcruz · Post by **jorgedlcruz** » Fri May 15, 2015 1:52 pm

Nice! I will create a Wiki article today about dnscache as we don't have too much info in the Wiki.

Have a good day.