Connectivity
Back to Top

Suitable host to ping for WAN connectivity test?

SOLVED
Highlighted
gozoinks
Occasional Visitor

Suitable host to ping for WAN connectivity test?

What would be a good host on Comcast's network to ping for a WAN connectivity test?

 

I have a few customers on Comcast with multiple WAN links for fail-over operation, and the firewalls use ICMP pings to check the status of each WAN link. I've generally used each WAN link's gateway IP address for this, but I recently discovered that in some cases that gateway will respond to pings even if the Internet is actually unreachable. So I think the gateway IP address might be insufficient to detect a downed link.

 

Other forums, like at Serverfault, have suggested pinging 4.2.2.1 (etc.), but it seems unnecessary to ping all the way out of Comcast's network.

 

Is there a good, stable host on Comcast's network that can handle round-the-clock pinging, that Comcast wouldn't mind its customers using, that could reliably indicate whether the link was up or down?


Even better, what might Comcast itself suggest I use for this?

 

Thanks!

Accepted Solution

Re: Suitable host to ping for WAN connectivity test?

You could likely get away with pinging their DNS.

 

75.75.75.75

75.75.76.76

View solution in context
Trusted Forum Contributor

Re: Suitable host to ping for WAN connectivity test?

You could likely get away with pinging their DNS.

 

75.75.75.75

75.75.76.76

gozoinks
Occasional Visitor

Re: Suitable host to ping for WAN connectivity test?

If it's good enough for Comcast_John, it's good enough for gozoinks John.

 

Thanks again,

 

j