@mwl Years ago, I couldn't get traceroute to work. I discover that our IT folks block ICMP as a security risk. Knowing arguing on the facts was useless, I opted for: "Here's the thing. I can't tell if the problem is mine or yours unless I can get all the way out (of my network.) So when I have a problem at 3am, I'll be forced to call you, just to determine it's my fault." That worked like a champ. Now both ping and traceroute work. ;)