Remote monitoring

[Michael Medin]

Hello,

Humm, this was quite interesting, is there a way to (from the plink) to
detect the status of the connection or does plink "die" when the
connection dies even?
Would be quite simple to add a "plugin" to run this from within
nsclient++, but for it to be useful you would need to be able to detect
the status of the link (and I have never used the command myself).

// MickeM


> On Tue, 12 Feb 2008 05:06:38 +0100, Paul Aviles
> <paul.aviles at nickelnetworks.com> wrote:
>
>> I am looking for a way to remotely monitor Windows servers. The servers
>> are on a  remote network and using network address translation so they
>> are not directly accessible. I saw that Pandora uses an agent on the
>> remote servers to connect via ssh to the main monitoring server and I
>> like that idea, but I have not been able to see any documentation on how
>> to do it with Nagios. In our configuration we cannot alter or open ports
>> on the clients firewalls, but outgoing ssh traffic should not be an
>> issue and I guess the monitoring server should not contact the remote
>> servers.
>
> Hi Paul,
>
> I think it should be quite easy to use putty's plink to connect and tunnel
> nsclient++ using remote tunneling (-R option).
>
> For example assuming NSClient is running on port 12489 you could run
>
> plink -R 20001:127.0.0.1:12489 guestuser at nagiosserver
>
> And then as long as the SSH connection stays open your nagiosserver will
> be able to access NSClient++ by connecting to 127.0.0.1 port 20001. You'd
> need to modify check_nt command a bit to always use 127.0.0.1 as an IP. If
> it's Nagios 3 you can also use custom variable (like _NSCLIENTPORT) in
> host definitions and reuse that in your version of check_nt command (using
> $_HOSTNSCLIENTPORT$).
>
> The solution might not be robust enough if your network is not stable - in
> that case you might need a wrapper that will restart plink if a connection
> is down... I'm not sure if any working solutions for this exist. I'm
> curious myself as I wrote a small wrapper that checks for connection
> timeouts - and I'm wondering if there's any better solution on Windows.
>
> --
> Wojciech Kocjan
>
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