Cogent IPV6 connectivity to

Joe Abley jabley at
Mon Nov 4 04:47:21 UTC 2013

> On Nov 3, 2013, at 15:38, Clinton Work <clinton at> wrote:
> I can reach on TCP port 80 so it looks like Cogent is
> just filtering or dropping IPV6 traceroute packets.

"Traceroute packets" is extremely vague. As a general rule, if you
want to discover a complete path between endpoints that are expected
to communicate using 80/tcp, trace the route using 80/tcp.

(Not that it's ever expected to see protocol-specific drops in a core
or across a transit or peering edge.)


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