[Ecn-sane] Issue with negotiating ECN with Cloudflare hosts?

[Jeremy Harris]

On 19/09/2019 18:50, Toke Høiland-Jørgensen wrote:
> Is anyone else experiencing problems negotiating ECN when connecting to
> Cloudflare? I see this for most sites protected by Cloudflare (such as
> bufferbloat.net), but only when using IPv4:

> I've opened a support request with my ISP, but thought I'd ask if anyone
> else was seeing this? (Is anyone else running with ECN enabled?)

Works for me:

[jgh at lap ~]$ cat /proc/sys/net/ipv4/tcp_ecn
1
[jgh at lap ~]$ curl -v 1.1.1.1
*   Trying 1.1.1.1:80...
* TCP_NODELAY set
* Connected to 1.1.1.1 (1.1.1.1) port 80 (#0)
> GET / HTTP/1.1
> Host: 1.1.1.1
> User-Agent: curl/7.65.3
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 301 Moved Permanently
< Date: Thu, 19 Sep 2019 18:23:34 GMT
...


-- 
Cheers,
  Jeremy