Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

my /etc/resolv.conf use and all 3 dig below answers without a A reocrd

dig @
dig @

but if i ping i end up pinging my server, thats not even at the same ISP as this computer, only connection i know is that this computers hostname is a subdomain of my server.

Where is ping and other softwhere geting the IP adresses from unregistered domains?

some relevant output:

puggan@rito ~ $ uname -a
Linux 2.6.38-gentoo-r6 #2 SMP Thu Jul 14 14:36:14 CEST 2011 i686 AMD Athlon(tm) II X2 245 Processor AuthenticAMD GNU/Linux

puggan@rito ~ $ dig @

; <<>> DiG 9.7.3 <<>> @
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 8080
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;    IN      A

;; Query time: 0 msec
;; WHEN: Fri Dec  2 15:51:31 2011
;; MSG SIZE  rcvd: 44

puggan@rito ~ $ ping -c 1
PING ( 56(84) bytes of data.
64 bytes from ( icmp_req=1 ttl=52 time=34.4 ms

--- ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 34.406/34.406/34.406/0.000 ms

puggan@rito ~ $ egrep "^(#|$)" -v /etc/resolv.conf
share|improve this question

migrated from Dec 2 '11 at 16:34

This question came from our site for professional and enthusiast programmers.

Anything in /etc/hosts? – Matti Virkkunen Dec 2 '11 at 15:16
nothing relevant: egrep "^(#|$)" -v /etc/hosts localhost ::1 localhost mrzoom-egotripp – Puggan Se Dec 2 '11 at 15:17
Marc B: yes, but dig should be catched to then, as opendns do, if i ran "dig @" i get a false A record – Puggan Se Dec 2 '11 at 15:18
up vote 2 down vote accepted
  1. You are not using fully-qualified domain names;
  2. your domain search path for converting names to FQDNs includes; and
  3. there is a wildcard at * that matches and that has a cname resource record set pointing to

Use fully-qualified domain names if you don't want to use the search path behaviour that you have configured in your DNS client library.

Further reading

share|improve this answer

Some ISPs intercept DNS requests and redirect them to their own, and serve up bad answers (e.g. their own spamvertising sites) in the hopes of making a few pennies off nonexistent/mis-typed domains.

As well, whoever's running the .se TLD can also have a wildcard *.se DNS entry to catch all non-existent .se domain lookups as well. For .se, this seems to be "":

$ nslookup -type=soa

Non-authoritative answer:
        primary name server =
        responsible mail addr =
        serial  = 2004000000
        refresh = 10800 (3 hours)
        retry   = 1800 (30 mins)
        expire  = 1209600 (14 days)
        default TTL = 900 (15 mins)     nameserver =     nameserver =    internet address =    internet address =</strike>

ok... should've picked a way more random/non-existent domain for this particular test. nslookup does return no-such-host.

share|improve this answer
nslookup -type=soa Server: Address: ** server can't find NXDOMAIN – Puggan Se Dec 2 '11 at 15:21 is a reigistred doamin, owned by HENRIK FORSELL – Puggan Se Dec 2 '11 at 15:22
for dig and nslookup give no a record, and ping gives me the same ip as my server – Puggan Se Dec 2 '11 at 15:31
ping should be using the system resolver settings, so ping/telnet/traceroute/ssh/etc... should all get the same IP when they look it up. – Marc B Dec 2 '11 at 15:46
they all have the same problem, but programs like dig and nslookup don't, and they use /etc/resolv.conf, so what backup plan are the system resolver using, i guess its using my hostname somehow, and i want to turn it off – Puggan Se Dec 3 '11 at 17:26

Got same problem again, forgot to write my soulution last time.

to turn off search domain i added search . in /etc/dhcpcd.conf (gentoo)

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .