Jesper Dangaard Brouer <bro...@redhat.com> writes: > On Thu, 19 Sep 2019 19:50:45 +0200 Toke Høiland-Jørgensen <t...@toke.dk> > 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: >> >> # sysctl -w net.ipv4.tcp_ecn=1 >> net.ipv4.tcp_ecn = 1 >> # 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/7.66.0 >> > Accept: */* >> > >> * Recv failure: Connection reset by peer >> * Closing connection 0 >> curl: (56) Recv failure: Connection reset by peer > > It works for me when repeating your experiment: > > $ sysctl -w net.ipv4.tcp_ecn=1 > net.ipv4.tcp_ecn = 1 > > $ curl -v 1.1.1.1 > * Rebuilt URL to: 1.1.1.1/ > * Trying 1.1.1.1... > * 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/7.61.1 >> Accept: */* >> > < HTTP/1.1 301 Moved Permanently > < Date: Fri, 20 Sep 2019 07:19:48 GMT > < Content-Type: text/html > < Transfer-Encoding: chunked > < Connection: keep-alive > < Location: https://1.1.1.1/ > < Served-In-Seconds: 0.000 > < CF-Cache-Status: HIT > < Age: 5944 > < Expires: Fri, 20 Sep 2019 11:19:48 GMT > < Cache-Control: public, max-age=14400 > < Server: cloudflare > < CF-RAY: 519208830aced891-CPH > [...] > > >> # sysctl -w net.ipv4.tcp_ecn=0 >> net.ipv4.tcp_ecn = 0 >> # 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/7.66.0 >> > Accept: */* >> > >> * Mark bundle as not supporting multiuse >> < HTTP/1.1 301 Moved Permanently >> < Date: Thu, 19 Sep 2019 17:42:22 GMT >> < Content-Type: text/html >> < Transfer-Encoding: chunked >> < Connection: keep-alive >> < Location: https://1.1.1.1/ >> < Served-In-Seconds: 0.000 >> < CF-Cache-Status: HIT >> < Age: 4442 >> < Expires: Thu, 19 Sep 2019 21:42:22 GMT >> < Cache-Control: public, max-age=14400 >> < Server: cloudflare >> < CF-RAY: 518d5b13fcfcd43f-HAM >> < >> <html> >> <head><title>301 Moved Permanently</title></head> >> <body bgcolor="white"> >> <center><h1>301 Moved Permanently</h1></center> >> <hr><center>cloudflare-lb</center> >> </body> >> </html> >> * Connection #0 to host 1.1.1.1 left intact >> >> >> 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?) > > I'm not seeing it, so it might be your ISP?
Yeah, guess I'll get to see if my ISP support knows what ECN is... Should be fun :P -Toke _______________________________________________ Bloat mailing list Bloat@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/bloat
