error (network unreachable)

[ic.nssip]

Hello everyone,

 

I just enabled querylog (using rndc querylog command) and each first query logged it's coming with errors (network unreachable) when trying to resolve dns servers names.

 

Has anyone any idea where from this sort of message is coming from and what should I do to get it fixed?

 

Thank you,

Julian

 

p.s. Here is a little capture from syslog showing the errors for 3 queries I sent to my DNS Server:

 

Apr 23 15:17:26 snowbird.nwtel.com named[2520]: [ID 873579 daemon.info] client 216.126.115.58#34096: query: www.google.com IN A + (216.126.115.58)
Apr 23 15:17:26 snowbird.nwtel.com named[2520]: [ID 873579 daemon.info] error (network unreachable) resolving 'www.google.com/A/IN': 2001:503:a83e::2:30#53Apr 23 15:21:50 ns.domain.com named[2520]: [ID 873579 daemon.info] client 216.126.115.58#34154: query: www.nwtel.ca IN A + (216.126.115.58)
Apr 23 15:21:50 ns.domain.com named[2520]: [ID 873579 daemon.info] error (network unreachable) resolving 'great-bear.northwestel.net/AAAA/IN': 2001:503:a83e::2:30#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] client 216.126.115.58#34278: query: www.cnn.com IN A + (216.126.115.58)
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns1.timewarner.net/A/IN': 2001:7fd::1#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns3.timewarner.net/A/IN': 2001:500:3::42#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns5.timewarner.net/AAAA/IN': 2001:dc3::35#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns1.timewarner.net/A/IN': 2001:dc3::35#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns1.timewarner.net/A/IN': 2001:500:1::803f:235#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns3.timewarner.net/A/IN': 2001:500:1::803f:235#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns3.timewarner.net/A/IN': 2001:503:c27::2:30#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns5.timewarner.net/AAAA/IN': 2001:503:c27::2:30#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns5.timewarner.net/AAAA/IN': 2001:500:2f::f#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns1.timewarner.net/A/IN': 2001:503:c27::2:30#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'ns3.timewarner.net/AAAA/IN': 2001:503:a83e::2:30#53
Apr 23 15:32:02 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'dmtns02.turner.com/A/IN': 2001:503:231d::2:30#53
Apr 23 15:45:45 ns.domain.com named[2676]: [ID 873579 daemon.info] client 216.126.115.58#34434: query: www.cnn.com IN A + (216.126.115.58)
Apr 23 15:45:45 ns.domain.com named[2676]: [ID 873579 daemon.info] error (network unreachable) resolving 'www.cnn.com/A/IN': 2001:503:231d::2:30#53

 

[Mark Andrews]

In message <FCC19E84EAD1411B...@internal.corp.ds>, "ic.nssip" writ
es:
>
> I just enabled querylog (using rndc querylog command) and each first =
> query logged it's coming with errors (network unreachable) when trying =

> to resolve dns servers names.
>

> Has anyone any idea where from this sort of message is coming from and =

> what should I do to get it fixed?

You should turn on IPv6. The messages are the result of named
trying to query nameservers using IPv6 but as you don't have a IPv6
route to these servers the OS returns a error message saying that
it couldn't send the message and named moves onto the next server.

Alternatively you can disable the use of IPv6 with "named -4".

Mark

> Thank you,
> Julian
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org