What does it mean when a ping reports a reasonable time (~10ms) but actually takes quite a long wall clock time (~15 seconds)? (Additionally, passing the
-U option for "full user-to-user latency" has no effect.)
This happens when pinging a certain external host from my work computer - and I'm poking around because I also get timeouts on HTTP requests to the same host. Something similar happens with traceroute, on only the last couple hops, which reach the subnet of the destination.
(Also, for what it's worth, the external host is cdn.sstatic.net, which I know generally works!)