Passive monitoring multiple servers with 1 NAT IP

[Assaf Flatto]

On 02/12/11 18:14, a.smith at ukgrid.net wrote:
>
> Hi,
>
> in the case where I want to monitor several servers in a remote office 
> where all outbound traffic from that office originates from a single 
> IP (NAT) is there any way I can monitor those with Nagios without 
> putting a Nagios server in the remote office?
> On the face of it it would seem impossible as Nagios identifies hosts 
> by their IP (and therefore each needs a unique IP) but would be good 
> to get that confirmed or otherwise,
>
> thanks for any ideas, Andy.
>
>
>
I've had a similar situation in one of my projects ,and it is solvable 
in one of 2 methods :
1 ) if you NAT server is a linux box - use the nrpe on that box to 
"trigger " the checks to all other boxes in the network and send back to 
the Nagios box.
2) Port forwarding - assign each machine a port and configure the host 
with the custom macro _NRPEPORT and thus the firewall send a query on 
the port to the assigned hosts in the NAT listing .

Assaf

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