Public bug reported:
I have an odd network situation that I have so far managed to narrow
down to the inability to resolve a domain via systemd-resolved which is
resolvable with nslookup. If I use nslookup against the two nameservers
on this network I get answers for the domain, but ping says it is unable
to resolve the same domain (as do browsers and crucially the captive
portal mechanism).
Here are details:
NSLOOKUP:
~$ nslookup securelogin.arubanetworks.com 208.67.220.220
Server: 208.67.220.220
Address: 208.67.220.220#53
Non-authoritative answer:
Name: securelogin.arubanetworks.com
Address: 172.22.240.242
~$ nslookup securelogin.arubanetworks.com 208.67.222.222
Server: 208.67.222.222
Address: 208.67.222.222#53
Non-authoritative answer:
Name: securelogin.arubanetworks.com
Address: 172.22.240.242
PING:
~$ ping securelogin.arubanetworks.com
ping: securelogin.arubanetworks.com: Name or service not known
mark@mark-X1Y2:~$
DIG:
~$ dig @208.67.222.222 securelogin.arubanetworks.com
; <<>> DiG 9.10.3-P4-Ubuntu <<>> @208.67.222.222 securelogin.arubanetworks.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 9416
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;securelogin.arubanetworks.com. IN A
;; AUTHORITY SECTION:
arubanetworks.com. 1991 IN SOA dns5.arubanetworks.com.
hostmaster.arubanetworks.com. 1323935888 3600 200 1209600 86400
;; Query time: 34 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Wed Oct 25 10:31:10 CEST 2017
;; MSG SIZE rcvd: 144
MORE DIG:
~$ dig securelogin.arubanetworks.com
; <<>> DiG 9.10.3-P4-Ubuntu <<>> securelogin.arubanetworks.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 3924
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;securelogin.arubanetworks.com. IN A
;; Query time: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Wed Oct 25 10:34:01 CEST 2017
;; MSG SIZE rcvd: 58
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1727237
Title:
systemd-resolved is not finding a domain
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