dhcp new lease notification

[Kevin Keane]

You can certainly do that, but you'll probably have to write your own 
plugin to do it. It's not something that would work generically; you 
will need to somehow tap into the specific DHCP server you are using. So 
the plugin will have to be tailored for the Windows DHCP server, or one 
of the ones for the Linux.

There are quite a few ways to do this:

If your DHCP server also updates a DNS server, it may be easier to 
instead enumerate all IP addresses in DNS (use host -l <domainname>), 
and compare that with a previous version of the same file. That is of 
course not completely reliable.

Or if you are using the Linux ISC DHCP server, your plugin could go 
through /var/lib/dhcp/db/dhcpd.leases and alert you to any leases newer 
than, say, 5 minutes. Keep in mind that this will alert you of renewals 
as well.

Tobias Exner wrote:
> Hi list,
>
> I would like to know when my dhcp-server leases a new ip-adress.
>
> The check_dhcp plugin seems to be not the right tool for that.
> Is there a easy way to do that with nagios?
>
>
> Thanks in advance...
>
>
> Tobias
>   


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