[Nagiosplug-devel] check_ping resolving error

Andreas Ericsson ae at op5.se
Wed Dec 10 10:32:50 CET 2008

Yaron Meiry wrote:
> Hey
> I'm using the Nagios check_ping utility version v1810 (nagios-plugins
> 1.4.11) and I think I have a DNS resolution problem.
> check_ping can't resolve a host correctly and reports a network problem.
> This is the default command line:
> *[root at machine libexec]# ./check_ping -H domain.tld -w 3000.0,80% -c
> 5000.0,100% -p 5
> CRITICAL - Network Unreachable (domain.tld)

You're getting ICMP_UNREACH when sending icmp packets to domain.tld.
That means there's no route from the network your nagios server sits
on to the network the domain.tld server sits on. Try running

   ping domain.tld

from the command line and you should see the same error message.

Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

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