Jan 09 2010

[Linux] “network unreachable resolving XXXX” messages in system log

Category: Articles,Linux administrationFractalizeR @ 3:10 pm

Some time ago I noticed many messages in log file about named attempt to resolve strange addresses.

--------------------- Named Begin ------------------------
**Unmatched Entries**
network unreachable resolving 'dns-b.iij.ad.jp/A/IN': 2001:240:bb41:8002::1:16#53: 1 Time(s)
network unreachable resolving 'dns-b.iij.ad.jp/A/IN': 2001:240:bb4c:8000::1:5#53: 1 Time(s)
network unreachable resolving 'nn.uninett.no/A/IN': 2001:500:1::803f:235#53: 1 Time(s)
network unreachable resolving 'nn.uninett.no/AAAA/IN': 2001:500:1::803f:235#53: 1 Time(s)

The reason is than since some version named puts IPv6 before IPv4. To get rid of this, you can edit /etc/sysconfig/named and add there a line with additional “-4” option:

OPTIONS=”-4″

And then just restart named.

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