Blocked router in host list

[Marc Powell]

Sounds like a perfectly reasonable use of the mysterious check_cluster
plugin that's in the current nagiosplug CVS...

--
Marc

> -----Original Message-----
> From: Carroll, Jim P [Contractor] [mailto:jcarro10 at sprintspectrum.com]
> Sent: Thursday, September 19, 2002 10:36 AM
> To: nagios-users at lists.sourceforge.net
> Subject: RE: [Nagios-users] Blocked router in host list
> 
> In a strict environment, even ICMP and UDP can be blocked.  So much
for
> ping
> and traceroute.
> 
> Argh... I wish there were a better way.  A 'virtual parent' or some
such,
> and a threshold, eg, "when 4 or more hosts from this hostgroup fail,
check
> the others, and if all the others have failed, send a single alert on
the
> virtual parent".  :P
> 
> jc
> 
> > -----Original Message-----
> > From: Marc Powell [mailto:mpowell at ena.com]
> > Sent: Thursday, September 19, 2002 10:02 AM
> > To: nagios-users at lists.sourceforge.net
> > Subject: RE: [Nagios-users] Blocked router in host list
> >
> >
> > Just my $0.02, but it's generally not a good idea to be telneting to
> > routers you don't own or maintain ;)
> >
> > What you really need is a check_icmp probe that uses TTL. I'm
> > not aware
> > of any that exist right now. I suppose you could write a wrapper to
> > traceroute itself. Pass the wrapper the host name or IP you want to
> > trace to and what to look for (probably the same has the host name
or
> > IP), issue the traceroute command and watch the output. If you see
the
> > hostname/IP you're looking for, then everything's great. If not then
> > something's wrong. This could potentially be a highly latent kind of
> > check though, especially if the host _is_ down and you have
> > to wait for
> > traceroute to time out. The -m switch might be useful.
> >
> > --
> > Marc
> >
> > > -----Original Message-----
> > > From: Carroll, Jim P [Contractor]
> > [mailto:jcarro10 at sprintspectrum.com]
> > > Sent: Thursday, September 19, 2002 9:49 AM
> > > To: nagios-users at lists.sourceforge.net
> > > Subject: RE: [Nagios-users] Blocked router in host list
> > >
> > > This might sound silly, but you could use the usual ICMP host
check,
> > but
> > > also do an ICMP service check.
> > >
> > > Are there no ports open on the router itself?  Not even telnet?
> > >
> > > jc
> > >
> > > > -----Original Message-----
> > > > From: Bas Rijniersce [mailto:bas at brijn.nu]
> > > > Sent: Tuesday, September 17, 2002 11:06 AM
> > > > To: Marc Powell
> > > > Cc: nagios-users at lists.sourceforge.net
> > > > Subject: Re: [Nagios-users] Blocked router in host list
> > > >
> > > >
> > > > Hi,
> > > >
> > > > >It will always stay undetermined until a service check is
> > > > completed. I'm
> > > > >confused why you would want to add a device to Nagios that you
> > can't
> > > >
> > > > Yup, you might be right. But I wanted to stay as close as
> > > > possible to the
> > > > traceroutes with the host mapping. If isn't draw in the
> > picture it's
> > a
> > > > little harder to follow if this router really dies (and all
> > > > the hosts behind
> > > > it go down).
> > > >
> > > > What is strange, in a traceroute it is turning up as a host. Is
> > there
> > > > somesort of check that could use this behaviour??
> > > >
> > > > Thanx,
> > > > Bas
> > > >
> > > >
> > > >
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