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68760
2012 Jul 25
3
DNS lookup delay with centos & postfix
I'm a bit baffled by this and I'm looking for ideas...
background:
two DNS servers (ns1 & ns2)(64bit CentOS 5.8)
one email server (64bit CentOS 5.8 & postfix 2.3.3)
one nagios server (64bit CentOS 5.8 & nagios 3.3.1)
situation:
- all servers configured to use both DNS servers for lookups
- ns1 server down for hardware problem
- nagios alerts that smtp on email server taking