How to check Internet access and/or DNS?

[Brian Scanlan]

On 24/01/06, Marc Haber <mh+nagios-users at zugschlus.de> wrote:
> On a second thought, how do I check DNS? I mean, even with the
> Internet down, my local DNS servers probably can correctly serve DNS
> records for my local network which they're authoritative for. So, does
> it make sense to check the DNS servers once for an external host (like
> www.nagios.org) and once for an internal host, resulting in two
> services being checked on the DNS server?

Just do checks for a few DNS entries - your ISP's website, your
externally hosted website, your internal website, nagios.org... If
most of these go down at the same time as your web check to
google.com, you know there's something bad happening  :)

Brian.


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