F5 DNS Configured behind Firewall but not working as expected

Hi All,

I have configured F5 DNS which is connected behind firewall to serve DNS. Firewall is doing NAT and translated to private IP addresses.

Clients --> FW (NAT) --> F5 DNS ---> VIP (private ip)

• I have configured servers with private ip 10.1.1.1 and 20.1.1.1 with translation IP address (public) 62.1.1.1 and 72.1.1.1.
• on GSLB Servers--> Virtual servers, I have dded VIP's NAT address as translation address.

After above configurations i have tried nslookup from internet and i am getting private IP address as DNS response. I am expecting VIP's translation address as DNS response but in my case it is not.

Can some one help please.

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