Date: Sun, 9 Jul 2006 22:58:31 +0800 From: "Paul Hamilton" <paulh@bdug.org.au> To: "'Greg Barniskis'" <nalists@scls.lib.wi.us> Cc: 'Pietro Cerutti' <pietro.cerutti@gmail.com>, freebsd-questions@freebsd.org, 'Alex Zbyslaw' <xfb52@dial.pipex.com>, 'Murray Taylor' <MTaylor@bytecraft.com.au> Subject: RE: using fping to monitor internet connection status Message-ID: <03f901c6a368$24b6e4d0$6600a8c0@w2k2> In-Reply-To: <44AD2CFB.1000606@scls.lib.wi.us>
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> -----Original Message-----
> From: Greg Barniskis [mailto:nalists@scls.lib.wi.us]
> Sent: Thursday, 6 July 2006 11:32 PM
> To: Paul Hamilton
> Cc: freebsd-questions@freebsd.org
> Subject: Re: using fping to monitor internet connection status
>
>
> Paul Hamilton wrote:
> > Hi,
> >
> > I need to monitor a number of IP addresses, so that if they ALL go
> > down (say three IP's), then that is a pretty good
> indication that my
> > server has lost internet connectivity. [snip] Any idea's on a ping
> > tool or simple script?
>
> Your test would be a little simpler if you just test one IP address:
> your ISP's upstream router. Its reachability is quite definitive re:
> whether your ISP link is up or down.
>
> Even it it's assigned dynamically by DHCP, you should be able to
> write a script that pulls that IP, pings it a few times, and checks
> the result. No special tools necessarily required.
>
> --
> Greg Barniskis, Computer Systems Integrator
> South Central Library System (SCLS)
> Library Interchange Network (LINK)
> <gregb at scls.lib.wi.us>, (608) 266-6348
>
>
Hi All,
Thanks for your input. I was hoping there was another cmd/util out there
similar to fping that I could elegantly use. I like the above idea though,
so I ended up using this to isolate the upstream ISP gateway IP:
traceroute -nm 2 <close-by Internet IP> | tail -1 | awk '{ print $2 }'
Integrated that into the fping Perl script and we are away!
Thanks once again :-)
Cheers,
Paul Hamilton
While the cats away - the mice do play!
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