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Forum Discussion

kva_178637's avatar
kva_178637
Icon for Nimbostratus rankNimbostratus
Jan 20, 2015

DNS Express and CNAMES to AWS servers

For internal DNS we sync our GTMs' DNS Express with AD Integrated DNS that is managed by another team. By default, CNAMES that point to the names of servers in AWS are not being resolved to an IP by ...
application delivery
aws
BIG-IP DNS
cloud
design
dns express
LTM
John_Heyer_1508's avatar
John_Heyer_1508
Icon for Cirrostratus rankCirrostratus
May 11, 2016

The F5 actually already has a BIND backend running, and one work-around is create a separate listener IP with it enabled but DNS express disabled, then use that as the DNS server that the clients point to.

 

Before undertaking anything, I found this was a useful doc to better understand the services and how they sometimes overlap:

 

K14510: Overview of DNS query processing on BIG-IP systems

 

  • Patricia_Gonzal's avatar
    Patricia_Gonzal
    Icon for Nimbostratus rankNimbostratus
    Oct 14, 2016

    We were able to do this with an Irule that disabled DNS Express for CNAME records in DNS Express Zones. We had to enable Bind on the GTM with forwarding resolvers.