You could just build a nagios server at your house and use that for free. Not really "enterprise-level", but if you're just looking for a last ditch alert it should work just fine. -Richard -----Original Message----- From: Michael Ruiz [mailto:mruiz@lstfinancial.com] Sent: Friday, November 26, 2010 12:15 PM To: nanog@nanog.org Subject: <Free Ping services that test your servers Availability from the Internet> Hey folks, I had a situation recently that our network went down and our Network Monitoring software did not notify us that the network was down because the internet connection went down. We had a problem with our carrier where they messed up on our /23(where our Network Monitoring software resides), when they did a maintenance. What transpired is our /23 was no longer routing to us. Is there a free ping internet service, or something that we can pay a company that just sends a ping to devices? If they fail to respond, then an email is sent to us? Thank you folks. M.A.R Senior Network Engineer