[outages] COX ICMP Filter

[Ryan Werber]

>>Has anyone confirmed if this affects all ICMP, or just specific ICMP
>>types (e.g. echoreq/echorep)?

>>If they're blocking all ICMP, someone at Cox needs to be fired
>>immediately.


My Cox Rep confirmed that it indeed being blocked at 'several' of their
peering points.  I have not got a RFO as of yet, but they are initially
blaming it on a "Peering Partner".  My investigation concluded that it
was COGENT (as174) that was the peering partner, yet I do not know who
exactly was at fault, though it didn't sound like it was Cox from my
rep.  They had mentioned that their own monitoring systems were dark due
to the outage. They had mentioned it was ALL icmp being affected.

This affected traffic regardless of destination or source ip address.

Ryan Werber
Sr Network Engineer
Epik Networks
Irvine, California