Can I find the uptime of an ISP from a remote locations?

January 26, 2012 at 12:30:36
Specs: Windows 7
My boss is asking me to write a batch file or use a utility to monitor the uptime of 16 different ISP accounts that we use across several stores. Most stores have several ISP accounts setup as failover, so they're not always active on our network but the ISP should still be up. He would like this to run from one of our servers. He is suggesting the 'gateway' for the ISP however I am not sure how to find this IP. The tracert utility returns IP addresses which are different than the gateway address in our router settings so I am wary to use those IPs.

Which IPs would I ping to monitor the uptime and where would be the best place to find them?

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January 26, 2012 at 13:21:29
If the connection isn't active you can't test it.

You would logon to each dual wan port router [assuming that is what you are using] and note the wan ip and gateway ip being used. But again those won't help you test.

Best you can do is download the router logs and review them. No "dropped connections" means the link would be up. If cisco routers [not linksys] you can do a show interfaces which will list each interface and its uptime.

Usually the wan ports on routers are set to not return icmp [ping and tracert] as a way of not being seen by hackers. You could enable icmp return and then from a remote site ping all of these remote wan ips with a ping -t sent to a log. You would end up spending a lot of time reviewing these logs.

BTW you would never use the gateway ip of the lan to test.

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January 26, 2012 at 14:37:59
You might also be able to get the uptime info from your ISP's

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***

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