Node fqdn - external dns

Question

I need to set up node through fqdn but the query must go to dns server which will be provided by client. I can't use dns set in tmos/big ip (resolv.conf).&nbsp;
Is it possible?&nbsp;

ilian_ivanov_23 · Answer

Yes, it is possible. First you need to set up a DNS. Navigate to "System  ››  Configuration : Device : DNS". Then you can create a node using the FQDN instead of IP address.&nbsp;

ilian_ivanov · Answer

Yes, it is possible. First you need to set up a DNS. Navigate to "System  ››  Configuration : Device : DNS". Then you can create a node using the FQDN instead of IP address.&nbsp;

mvdg · Answer

Do you mean the DNS server configured on the client connecting to the VS must be used for creating a node on the F5 via FQDN? Or do you mean the client you use to configure the F5?&nbsp;
Can you give us more details on what you are trying to accomplisch and why you cannot use the DNS servers configured on the F5? &nbsp;

gwil · Answer

I cannot use local dns because it isn't resolve public names, it is only for local network.&nbsp;
What I want to achieve is connect to client (client means 3rd party application outside my network) through LTM.&nbsp;
My app shoots to VS which has POOL with my client server NODE (fqdn because they use dynamic ip's, they will also provide me their dns server to resolve their names)&nbsp;

mvdg · Answer

Hi,&nbsp;
Did some testing in my lab and I don't think it's possible what you want.&nbsp;
When configuring a node with FQDN, the F5 appliance uses the configured DNS servers to resolve to an IP-address. Needed to be sure, so used TCPDUMP and seeing the F5 contacting the configured DNS server when creating a node with FQDN.&nbsp;
If you do not want to configure the F5 with external DNS servers and your local DNS servers cannot forward requests to external DNS server, you can't solve this.&nbsp;
Maybe you can use conditional forwarding on your DNS servers so forwarding only takes place for this 3rd party external server.&nbsp;
Regards,
Martijn.&nbsp;

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Node fqdn - external dns

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