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Forum Discussion

REddy's avatar
REddy
Icon for Nimbostratus rankNimbostratus
Dec 07, 2024

CNAME Flattening

Hi, F5 GTM's are our domain (let us say example.com) authorized DNS servers. Our website is accessible on  example.com and www.example.com. We are migrating to the cloud and the DNS queries will sti...
F5 GTM DNS
Mohamed_Salah_'s avatar
Mohamed_Salah_
Icon for MVP rankMVP
Dec 11, 2024

If you haven't mentioned in ZoneRunner that those records are configured as CNAMEs instead of A records, you will not receive a result when querying for these records. This is because no delegation is taking place. It will only work when you query for the CNAME as you have mentioned, as the response will be returned from the WIDE-IP.

If I understand the setup correctly, you have ZoneRunner acting as the authoritative DNS, and there are some records that need to be delegated to the cloud.

For example, if www.example.com have an A record in ZoneRunner, you will need to create a CNAME instead, such as www.host.example.com. This subzone should then be linked with the glue records, which are the NS records for the cloud.

After making these changes, you can test the again.