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
kva_178637's avatar
kva_178637
Icon for Nimbostratus rankNimbostratus

Hi Brad, we need to reference multiple Amazon EC2 servers by name since their IPs may be changing. We do not host the zone that has the A records. Currently we are using an irule, but then need to manually maintain a dgl list. Since multiple teams are involved this introduces potential for errors.

 

Brad_Parker's avatar
Brad_Parker
Icon for Cirrus rankCirrus
Jan 20, 2015
Do you not trust Amazon's name servers to perform as well as your GTM? or are you attempting to shroud the response so the end user is getting the CNAME back suggesting it is hosted by Amazon? The only way I see to do this would be to possibly use an iRule that gathers the IP from Amazon's name servers and cache the record according to the TTL their record sends back. I don't think that would perform any faster than allowing the lookup to go to Amazon's name servers.