Duplicities when resolving gitlab.labs.nic.cz
$ dig +rd IN A gitlab.labs.nic.cz @127.0.0.1
;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 40903
;; Flags: qr rd ra; QUERY: 1; ANSWER: 3; AUTHORITY: 0; ADDITIONAL: 0
;; QUESTION SECTION:
;; gitlab.labs.nic.cz. IN A
;; ANSWER SECTION:
gitlab.labs.nic.cz. 16 IN CNAME git.nic.cz.
git.nic.cz. 16 IN A 217.31.192.88
git.nic.cz. 16 IN A 217.31.192.88
;; Received 94 B
;; Time 2016-04-15 09:10:09 CEST
;; From 127.0.0.1@53(UDP) in 0.2 ms
- something strange happens when records expire from cache:
$ dig +rd IN A gitlab.labs.nic.cz @127.0.0.1
;; WARNING: truncated reply from 127.0.0.1@53(UDP), retrying over TCP
;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 15051
;; Flags: qr rd ra; QUERY: 1; ANSWER: 3; AUTHORITY: 0; ADDITIONAL: 0
;; QUESTION SECTION:
;; gitlab.labs.nic.cz. IN A
;; ANSWER SECTION:
gitlab.labs.nic.cz. 30 IN CNAME git.nic.cz.
git.nic.cz. 30 IN A 217.31.192.88
git.nic.cz. 30 IN A 217.31.192.88
;; Received 94 B
;; Time 2016-04-15 09:10:40 CEST
;; From 127.0.0.1@53(TCP) in 0.2 ms