Forum Discussion
NimbostratusDNS server not resolving url until cache is cleared repeatedly.
Hello,
What could be causing this? Other dns servers get the records without problem.
The F5 resolves other urls ok only this one has a problem.
A pcap shows F5 dns responding with no such name. But when I clear cache it works.
; <<>> DiG 9.11.4-P1 <<>> @196.2.5.6 vivo.grainindustries.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 53353
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;vivo.grainindustries.com. IN A
;; AUTHORITY SECTION:
grainindustries.com. 86015 IN SOA ns1.ecobiz.co.ke. info.ecobiz.co.ke. 2019110100 86400 7200 3600000 86400
;; Query time: 8 msec
;; SERVER: 196.2.5.6#53(196.201.217.7)
;; WHEN: Fri Nov 01 18:14:52 EAT 2019
;; MSG SIZE rcvd: 110
dns0:/S1-green-P:Active:Standalone] etc #
JGCumulonimbus
This does not seem to be an issue of F5, but of the DNS service provider for the domain; for there are different results for different lookup locations. A lookup failure will carry with it a long negative TTL of hours.
JMutieWhat config on the domain has a problem? Can missing SOA config cause this?
- JG
It's hard to pinpoint where the problem is. Possibly due to messing with the DNS by Security people - half of the Internet seems to be broken by them. ðŸ˜