Nagios and NAT

[Vik Evans]

I have run into situations before where some SNMP / Monitoring utility
does not work with with NAT. i.e. - you cannot define a nat'd subnet and
have the tool discover all devices by their nat'd IP address.

What ends up happening is that the devices are discovered, however when
you begin managing by SNMP, the real IP addresses are discovered and you
begin seeing errors (red) on your maps or devices get removed from the
nat'd domain and put into containers based on their real IP addresses.
If all the monitoring is done to the nat'd IP's and you do not have
routing to the real IP's, you get errors.

Does Nagios work in NAT environments and can it monitor interfaces, etc.
yet still base its polling on the NAT'd IP which you have routing to?




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