DNS Anomalies?
Posted: Fri Apr 15, 2016 1:20 am
I have undefined, null, & none all defined in the HOSTS file as 0.0.0.0, and dnsmasq (configured with 'domain-needed' option) is reading the HOSTS file and supposed to be returning DNS queries from it... however:
Why this weird results?
For reference, this one works as expected:
Code: Select all
$ dig null
; <<>> DiG 9.9.5-3ubuntu0.8-Ubuntu <<>> null
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6247
;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 25
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;. IN NS
;; ANSWER SECTION:
. 483436 IN NS l.root-servers.net.
. 483436 IN NS j.root-servers.net.
. 483436 IN NS i.root-servers.net.
. 483436 IN NS g.root-servers.net.
. 483436 IN NS k.root-servers.net.
. 483436 IN NS e.root-servers.net.
. 483436 IN NS f.root-servers.net.
. 483436 IN NS d.root-servers.net.
. 483436 IN NS c.root-servers.net.
. 483436 IN NS a.root-servers.net.
. 483436 IN NS b.root-servers.net.
. 483436 IN NS m.root-servers.net.
. 483436 IN NS h.root-servers.net.
;; ADDITIONAL SECTION:
a.root-servers.net. 310638 IN A 198.41.0.4
a.root-servers.net. 310638 IN AAAA 2001:503:ba3e::2:30
b.root-servers.net. 310640 IN A 192.228.79.201
b.root-servers.net. 319957 IN AAAA 2001:500:84::b
m.root-servers.net. 310638 IN A 202.12.27.33
m.root-servers.net. 310719 IN AAAA 2001:dc3::35
h.root-servers.net. 310636 IN A 198.97.190.53
h.root-servers.net. 310771 IN AAAA 2001:500:1::53
l.root-servers.net. 310653 IN A 199.7.83.42
l.root-servers.net. 310997 IN AAAA 2001:500:9f::42
j.root-servers.net. 310640 IN A 192.58.128.30
j.root-servers.net. 320978 IN AAAA 2001:503:c27::2:30
i.root-servers.net. 310845 IN A 192.36.148.17
i.root-servers.net. 382234 IN AAAA 2001:7fe::53
g.root-servers.net. 310640 IN A 192.112.36.4
k.root-servers.net. 310651 IN A 193.0.14.129
k.root-servers.net. 314617 IN AAAA 2001:7fd::1
e.root-servers.net. 310941 IN A 192.203.230.10
f.root-servers.net. 310924 IN A 192.5.5.241
f.root-servers.net. 311220 IN AAAA 2001:500:2f::f
d.root-servers.net. 310653 IN A 199.7.91.13
d.root-servers.net. 310859 IN AAAA 2001:500:2d::d
c.root-servers.net. 310761 IN A 192.33.4.12
c.root-servers.net. 310809 IN AAAA 2001:500:2::c
;; Query time: 43 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: xxxxxxxxxxxxxxxxxxxxxxx
;; MSG SIZE rcvd: 755
Code: Select all
$ dig none
; <<>> DiG 9.9.5-3ubuntu0.8-Ubuntu <<>> none
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 33712
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;. NONE NS
;; Query time: 51 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: xxxxxxxxxxxxxxxxxxx
;; MSG SIZE rcvd: 17
For reference, this one works as expected:
Code: Select all
$ dig undefined
; <<>> DiG 9.9.5-3ubuntu0.8-Ubuntu <<>> undefined
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46884
;; flags: qr aa rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;undefined. IN A
;; ANSWER SECTION:
undefined. 0 IN A 0.0.0.0
;; Query time: 0 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: xxxxxxxxxxxxxxxxxxx
;; MSG SIZE rcvd: 43