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Amr_Ali's avatar
Amr_Ali
Icon for MVP rankMVP
Aug 31, 2023

F5 GTM resolution issue

I have an issue with F5 GTM resolution, after using nslookup to check if I can resolve the name of the website, that I created as an A record using wildeIP on GTM, I see that I can receive the correc...
application delivery
gtm
security
  • vaibhav's avatar
    vaibhav
    Sep 05, 2023

    Can you share how the zones are configured and how you have setup the WIPs and zone records.Are you delegating the TLD or is it just subzone. 

    can you draw the query architecure you have , so technically your TLD should hosted on your DNS externally as the registrar will send traffic on external provider and then the subzone should be aliased to the GTM. Once the subzone is deligated the WIP should be configured under the subzone on your GTM. Can you confirm that you are aligned with same design.
    Did you queried the same subzone record that is present in your GTM. For example if your URL is xyz.abc.com it might be aliased to xyz.abc.com.gtm.abc.com ---> as you have ns records 

    I do not see the packetcapture query response but i believe you have tried to create a zone replica of the external DNS which might not be sending the query correctly.

     

     

Mohamed_Ahmed_Kansoh's avatar
Mohamed_Ahmed_Kansoh
Icon for MVP rankMVP
Aug 31, 2023

Hi Amr_Ali , 
I am wondering how do you get the correct IP address for this website , and it shows in Pcap that an error as you should receive NX Domain , not the correct answer. 

Do you enable BIND in the DNS profile ? 
I mean make sure that bigip DNS system replies using wide ip configs

try to clear Local DNS or your windows cache.