internet blocking problem ?

Noel Chiappa jnc at
Fri Sep 11 11:58:16 CDT 2015

    > From: Jon Elson

    > so MANY others who could not access the page were finding
    > they got stopped at cogentco.

Well, to be precise 'Cogentco was the last node on the route which

It's impossible to say whether i) that node tossed packets that tried to go
further; ii) it forwarded them to some other node (identity unknown) which
did toss them (and didn't allow/handle traceroute), etc.

One can't draw any conclusions about whether it's i) from the fact that it's
_also_ still responding to traceroute packets sent to that address: one would
have to know whether it does the a) 'is this packet to a destination I'm
filtering' check before it does the b) 'I decremented the TTL and it's now
zero', or the other way around. If b) it could be the node that's dropping
the packets.

But given that other 'last hops' are also producing similar results, I'm
still thinking it's which is tossing the packets, not the 'last hop'
one can see on traceroutes.


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