I've
AT&T fiber (in RTP, NC) (AS7018) and I notice UDP QUIC
traffic
from google (esp. youtube) becomes very slow after a time.
This especially occurs with ipv4 connections. I'm not the
only one to
notice; a web search for e.g. "Extremely Poor Youtube TV
Performance"
notes the issue.
I assume traffic is being throttled on AT&T's side. And
it's not done
with their CPE; I'm bypassing their NAT box and connecting
my laptop
directly to the ONT.
A quick google search shows people are aware that QUIC can
look like
DoS traffic -- but how widely known is this problem? It may
become
worse if / when sites transition to HTTP/3
For now I reject UDP 443 on the client firewall.
Applications using
QUIC client libraries then fallback to TCP. This works well
and I have
no issues with latency or throughput when using TCP.
May I naively ask if Google staff are working with AT&T
to address this?
Sounds like you found the answer, ATT just
needs to scale up your rejection approach that is proven to
work well.
Yes, most ddos traffic is ipv4 udp and yes
Google was made aware that they would be mixing with bad
company in the pool of ipv4 udp traffic ... but they have
reasons.
I am not a fan of quic or any udp traffic. My
suggestion was that Google use an new L4 instead of UDP, but
that was too hard for the Googlers.
So here we are.
Just say no to udp.