For my firewall scripts to determine whether my ISP is up I need a few reliable, geographically distributed addresses to ping.
I could just use some major sites like Google, Akamai, etc. But that seems rude. It is also unreliable, what if they decide to start blocking ICMP traffic like so many other sites already do?
I'd prefer to use hosts that have gone on the record saying they are ok with this. Are there any hosts that have offered to serve as a public "ping" target, the way many public NTP servers offer their services?
A list, or round-robin DNS of such hosts would be excellent, but I suspect that's asking too much...