DNS 问题解决 Host xxx.xxx.xxx.xxx not found :2(SERVFAIL) .

问题 [root@station01 named]# host 192.168.0.2

Host 2.0.168.192.in-addr.arpa not found: 2(SERVFAIL)

反向解析的出现错误，这时我们需要查看DNS日志，先看下/var/log/messages里

[root@station01 named]# tail /var/log/messages

Jan 21 11:12:25 station01 named[5262]: the working directory is not writable

Jan 21 11:12:25 station01 named[5262]: zone 0.in-addr.arpa/IN/localhost_resolver: loaded serial 42

Jan 21 11:12:25 station01 named[5262]: zone 0.0.127.in-addr.arpa/IN/localhost_resolver: loaded serial 1997022700

Jan 21 11:12:25 station01 named[5262]: zone 0.168.192.in-addr.arpa/IN/localhost_resolver: loading master file named.yutian: permission denied

Jan 21 11:12:25 station01 named[5262]: zone 255.in-addr.arpa/IN/localhost_resolver: loaded serial 42

Jan 21 11:12:25 station01 named[5262]: zone 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN/localhost_resolver: loaded serial 1997022700

Jan 21 11:12:25 station01 named[5262]: zone yutian.com/IN/localhost_resolver: loaded serial 42

Jan 21 11:12:25 station01 named[5262]: zone localdomain/IN/localhost_resolver: loaded serial 42

Jan 21 11:12:25 station01 named[5262]: zone localhost/IN/localhost_resolver: loaded serial 42

Jan 21 11:12:25 station01 named[5262]: running

貌似没发现什么问题，这个默认是info级别的日志，在去查看下debug级别的日志

[root@station01 data]# tail named.run

exiting

zone 0.in-addr.arpa/IN/localhost_resolver: loaded serial 42

zone 0.0.127.in-addr.arpa/IN/localhost_resolver: loaded serial 1997022700

zone 0.168.192.in-addr.arpa/IN/localhost_resolver: loading master file named.yutian: permission denied

zone 255.in-addr.arpa/IN/localhost_resolver: loaded serial 42

zone 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN/localhost_resolver: loaded serial 1997022700

zone yutian.com/IN/localhost_resolver: loaded serial 42

zone localdomain/IN/localhost_resolver: loaded serial 42

zone localhost/IN/localhost_resolver: loaded serial 42

running

问题找到了，是权限的问题