On Tue, Feb 27, 2018 at 09:52:54PM +0000, Chip Marshall wrote: > On 2018-02-27, Ca By <cb.li...@gmail.com> sent: > > Please do take a look at the cloudflare blog specifically as they > > name and shame OVH and Digital Ocean for being the primary sources > > of mega crap traffic > > > > https://blog.cloudflare.com/memcrashed-major-amplification-attacks-from-port-11211/ > > > > Also, policer all UDP all the time... UDP is unsafe at any speed. > > Hi, DigitalOcean here. We've taken steps to mitigate this attack on > our network.
NTT too has deployed rate limiters on all external facing interfaces on the GIN backbone - for UDP/11211 traffic - to dampen the negative impact of open memcached instances on peers and customers. The toxic combination of 'one spoofed packet can yield multiple reponse packets' and 'one small packet can yield a very big response' makes the memcached UDP protocol a fine example of double trouble with potential for severe operational impact. Kind regards, Job
