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Emmett_116863's avatar
Emmett_116863
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Mar 12, 2014

Use GTM Cluster for internal recursive name resolution

Hi Everyone,   I have been trying to set up what I would think would be a fairly normal configuration.   I have a pair of F5 GTM's running 11.3 running as authoritative name servers for a few d...
BIG-IP DNS
deployment
design
  • Cory_50405's avatar
    Cory_50405
    Mar 12, 2014

    You can assign your listener address to whatever you want from that internal vlan. It doesn't have to be a floating IP address, but it can be. In the DNS profile you attached to your listener, did you enable 'Use BIND Server on BIG-IP'? Since you defined recursion through named, it'll need to be able to use BIND.

     

    If locally issued GTM queries can't recurse out to the Internet, then it could be something is preventing it from getting out, like a firewall.

     

Emmett_116863's avatar
Emmett_116863
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Mar 12, 2014

I did set up a listener on my internal floating IP but apparently didn't configure it appropriately...otherwise it would have worked. :-)

 

Well...I say that, but...maybe I didn't.

 

Let me use some (fake) network numbers to help create a better picture:

 

External Floating IP: 222.222.222.3 Internal Floating IP: 10.10.1.3

 

I would like to be able to put "nameserver 10.10.1.3" in the /etc/resolv.conf of all my internal machines.

 

If I create a listener on the 10.10.1 network, will it automatically be associated with the floating IP?

 

I think I also have other configuration needs to get the GTM to resolve external addresses. If I run "dig www.google.com" when logged onto my active GTM in the cluser, it doesn't resolve.

 

Like I said...I think it shouldn't be a unique setup.

 

Thanks for your help.

 

-Emmett