> It's useful to be able to hand an ISP a "look, I can reach X location in your network and then the traceroute died" and they can't wonder "are you sure your f

> It's useful to be able to hand an ISP a "look, I can reach X location in your network and then the traceroute died" and they can't wonder "are you sure your firewall isn't blocking it?" I know what you mean, but this is not a panacea IMO. I just had to deal with a network that was blocking outbound traffic, by protocol, on non-standard ports (eg, HTTP would work fine to port 80, but not to port 8000 - and the connection would only get killed about 3 or 4 packets in), and one of the admins just had me do a traceroute to the IP in question, and went "well, the traffic makes it outside of our network, so it's not our fault".