I currently have a domain example.com authoritative on my Ubuntu server and it
is delegating gslb.example.com to my load balancer.
www.example.com is a CNAME for www.gslb.example.com
Gslb.example.com has an NS record pointing to the LB
Client sends query for www.example.com to Ubuntu DNS server. The Ubuntu DNS
server sends a query to the load balancer for www.gslb.example.com and the LB
responds to the Ubuntu DNS server with the right A record in the answer
section. However, the Ubuntu server responds to the client with servfail.
When I look at the pcap from the Ubuntu server, the LB is responding to it with
the correct IP but the dig response from the Ubuntu server to the client shows
"no servers could be reached" when I dig against the Ubuntu. I also see the
same message in the dns response in the pcap (obviously).
Ryans-MacBook-Pro:~ ryanc$ dig @10.10.1.50 www.example.com <-me querying the
Ubuntu for www.example.com
; <<>> DiG 9.8.3-P1 <<>> @10.10.1.50 www.example.com
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
Do you have any ideas as to why this is happening?
Ryan Chervenka
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