[tor-relays] atlas.cogentco.com Is blocking

[Andy Isaacson]

On Thu, Oct 19, 2017 at 01:19:21AM +0000, Paul Templeton wrote:
>> Whoever runs that node will need to talk to their ISP support team to
>get it unblocked.
>
>Thanks Andy - the reason I asked because its not with the Service Provider it's there upstream carrier - I have lodged a ticket with the carrier and waiting to here back. The ISP doesn't know anything. I haven't received any notification - it was dropped with no indication... Plus when have major international carriers started to drop IP address???

Null routing a /32 is a standard technique for dealing with massive DDoS 
attacks.  Your netblock is operated by DigiCube, they have someone who 
manages their BGP configuration and they are likely the one who needs to 
restore access (assuming whatever issue caused them to null route it is 
now resolved).

-andy