On 28 Feb 2018, at 5:26, Ca By wrote:
Just udp.
This Arbor Threat Summary discusses the TCP issue, as well, FWIW:
<https://www.arbornetworks.com/blog/asert/memcached-reflection-amplification-description-ddos-attack-mitigation-recommendations/>
'It should also be noted that memcached priming queries can also be
directed towards TCP/11211 on abusable memcached servers. TCP is not
currently considered a high-risk memcached reflection/amplification
transport as TCP queries cannot be reliably spoofed.'
We also recommend implementing situationally-appropriate network access
policies at the IDC edge which disallow unwanted UDP/11211 as well as
TCP/11211 from reaching abusable memcached deployments.
-----------------------------------
Roland Dobbins <rdobb...@arbor.net>
