[Nagios-users] Differentiate between monitoring modem Vs router

Hi All,

I want to monitor a host who has a Linksys router, which after 24 hours or so from being power cycled gradually locks out. All attempts to ping, httping, traceroute, fail. Surprisingly, nmap shows:

Sometimes it may find an open port, sometimes not in which case it reports that all ports are filtered. I assume from these tests that the problem lies with the router as opposed to the modem, otherwise I would get a connection refused/failed sort of message, right? Is there a way to set up Nagios to monitor/compare both modem and router? I am thinking along the lines of pinging the router as normal and when that fails repeatedly, to run a command to check the modem. How should I go about setting this up?

PS. Don't be shy to go into detail here, I'll probably need it. :)

-- 
Regards,
Mick

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