Debian resolves non existing domains to itself

[rellek]

Hi,

I have a problem. I have a Debian 7.0 server that resolves non-existent domains (like jhdjkhfkjhsdkjhksjdjkdfbhdfjkdf.com) to his own IP. I know from my Debian-based NAS (and my Mac) that *nix could just say "unknown host" when trying to ping it.

Well, while this does seem like a cosmetic problem at the first try, this is a real problem when something goes wrong. It killed Akismet once as it resolved to itself and got 404 when trying to query.

What's the problem?

/etc/resolv.conf:

### Hetzner Online AG installimage
# nameserver config
nameserver 213.133.98.98
nameserver 213.133.99.99
nameserver 213.133.100.100
nameserver 2a01:4f8:0:a0a1::add:1010
nameserver 2a01:4f8:0:a111::add:9898
nameserver 2a01:4f8:0:a102::add:9999

/etc/hosts:

### Hetzner Online AG installimage
# nameserver config
# IPv4
127.0.0.1 localhost
144.76.110.48 riddick.sajonara.de riddick
#
# IPv6
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
2a01:4f8:192:602f::2 riddick.sajonara.de riddick

ping google.com:

root@riddick:/home/rellek# ping google.com
PING google.com (173.194.112.34) 56(84) bytes of data.
64 bytes from fra07s28-in-f2.1e100.net (173.194.112.34): icmp_req=1 ttl=56 time=6.58 ms
^C
--- google.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 6.586/6.586/6.586/0.000 ms
root@riddick:/home/rellek#

ping jdfhkjfdhkjdfhjkdfhjkdfkj.com:

root@riddick:/home/rellek# ping jdfhkjfdhkjdfhjkdfhjkdfkj.com
PING jdfhkjfdhkjdfhjkdfhjkdfkj.com.sajonara.de (144.76.110.48) 56(84) bytes of data.
64 bytes from riddick.sajonara.de (144.76.110.48): icmp_req=1 ttl=64 time=0.013 ms
64 bytes from riddick.sajonara.de (144.76.110.48): icmp_req=2 ttl=64 time=0.009 ms
^C
--- jdfhkjfdhkjdfhjkdfhjkdfkj.com.sajonara.de ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.009/0.011/0.013/0.002 ms
root@riddick:/home/rellek#

bind9 is currently stopped, so this should not be the problem.

Edit:
imagine the stars in rid****.sajonara.de as rid_d_i_c_k - it gets censored by XenForo, it seems. I was told ridd_ick is a movie with Vin Diesel which is why the server got named ridd_ick. *G*

 

[Floren]

First, disable IPv6. Then, tell us what happens if you use:

# cat /etc/resolv.conf
search sajonara.de
nameserver 8.8.8.8
nameserver 8.8.4.4
# cat /etc/hosts
127.0.0.1       localhost.localdomain   localhost

 

[rellek]

Hi,

thanks for your reply, but nothing changed

root@riddick:/home/rellek# cat /etc/sysctl.d/disableipv6.conf
net.ipv6.conf.all.disable_ipv6=1
root@riddick:/home/rellek# cat /etc/resolv.conf 
### Hetzner Online AG installimage
# nameserver config
#nameserver 213.133.98.98
#nameserver 213.133.99.99
#nameserver 213.133.100.100
#nameserver 2a01:4f8:0:a0a1::add:1010
#nameserver 2a01:4f8:0:a111::add:9898
#nameserver 2a01:4f8:0:a102::add:9999

search sajonara.de
nameserver 8.8.8.8
nameserver 8.8.4.4
root@riddick:/home/rellek# cat /etc/hosts
### Hetzner Online AG installimage
# nameserver config
# IPv4
127.0.0.1 localhost.localdomain localhost
#144.76.110.48 riddick.sajonara.de riddick
#
# IPv6
#::1 ip6-localhost ip6-loopback
#fe00::0 ip6-localnet
#ff00::0 ip6-mcastprefix
#ff02::1 ip6-allnodes
#ff02::2 ip6-allrouters
#ff02::3 ip6-allhosts
#2a01:4f8:192:602f::2 riddick.sajonara.de riddick
#72.233.69.89 rest.akismet.com
#62.156.238.72 urls.api.twitter.comroot@riddick:/home/rellek# ping google.com
PING google.com (173.194.70.139) 56(84) bytes of data.
64 bytes from fa-in-f139.1e100.net (173.194.70.139): icmp_req=1 ttl=49 time=6.36 ms
^C
--- google.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 6.369/6.369/6.369/0.000 ms
root@riddick:/home/rellek# ping jdfhkjfdhkjdfhjkdfhjkdfkj.com
PING jdfhkjfdhkjdfhjkdfhjkdfkj.com.sajonara.de (144.76.110.48) 56(84) bytes of data.
64 bytes from riddick.sajonara.de (144.76.110.48): icmp_req=1 ttl=64 time=0.014 ms
64 bytes from riddick.sajonara.de (144.76.110.48): icmp_req=2 ttl=64 time=0.007 ms
^C
--- jdfhkjfdhkjdfhjkdfhjkdfkj.com.sajonara.de ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.007/0.010/0.014/0.004 ms
root@riddick:/home/rellek#