backbones filtering unsanctioned sites

Ken Chase math at
Fri Feb 10 19:08:51 UTC 2017

  >"Abuse cannot not provide you a list of websites that may be encountering
  >reduced visibility via Cogent"

They could, if they kept a list of forward lookups they had done to get IPs
that ended up in their blacklists. But just having the IPs it's impossible to
get the whole list of possible hostnames that point at it (reverse records are
singular, and often missing).

Nonetheless, it'd be nice to know how a single IP got onto the list - and what
Cogent's doing about situations where multiple other hostnames map onto the
same ip.

I have clietns that are Cogent customers, I'd just like to get informed before
I bring the hammer down.

Ken Chase - math at Guelph/Toronto Canada
Heavy Computing - Clued bandwidth, colocation and managed linux VPS @151 Front St. W.

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