Beta Branch enable TCP Fast Open support if system supports it

enable TCP Fast Open support if system supports it

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If system supports TCP Fast Open, enable support for it on system and within Nginx web server TCP Fast Open - Wikipedia.

Once enabled in Nginx, you need to setup only one instance listen directive with fastopen=256 paramter as per Module ngx_http_core_module. Example add to listen line for /usr/local/nginx/conf/conf.d/virtual.conf

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123.09beta01 branch

• Branch: GitHub - centminmod/centminmod at 123.09beta01
• Commit History: Commits · centminmod/centminmod · GitHub

 

More info at TCP Fast Open: expediting web services [LWN.net]

Just note both client and web server end need to support TCP Fast Open and that only happens on Linux systems on both ends. So Windows based visitors won't support TCP Fast Open even if web server - Centmin Mod Nginx supports TCP Fast Open.

You can possibly test this with webpagetest.org as they have a new test location with Linux based client side instead of the normal Windows or Android client side for Dulles, VA - Linux experimental



This forum's server has had TCP Fast Open enabled for past 2.5 years now. Example - improved Speed Index and perceived visual render time due to elimination of one RTT (Round Trip Time).



versus Windows test location



compared



Though it maybe that Webpagetest Linux test server is less congested or more performant as from tests on other sites, Linux test Webpagetest end point tested faster for Speedinfex too.

 

Ah Microsoft Edge browser might have TCP Fast Open support https://blogs.windows.com/msedgedev...-false-start-and-tls-1-3/#fvkdJcgUCD35fUBc.97

disabled by default



Windows Chrome doesn't have it optionally supported only for Chrome on Linux, Chrome OS and Android

 

not any more with this commit, centmin mod with auto set it up https://community.centminmod.com/threads/auto-detect-tcp-fast-open-and-auto-add-fastopen-listen-directive-to-n….11229/ auto setup in listen directive of /usr/local/nginx/conf/conf.d/virtual.conf

 

there was a bug fix i just made for this a few hours ago, so if you run centmin.sh menu option 23 submenu option 2 and then recompile nginx via centmin.sh menu option 4 it should auto set it in virtual.conf

 

Also you can use wireshark inspect tcpdump of connection between linux client and linux server both enabled with TFO on either ends on system + within client browser. Look for TFO cookie in wireshark. Though from testing webpagetest.org's linux test server either doesn't have TCP Fast Open enabled on their linux server end or not enabled within Chrome linux browser they use as I am not seeing teh TFO cookie or from server side stats.

 

Yeah windows Chrome doesn't have support, Linux and Android Chrome does. I had it enabled on Android Chrome for years now without problem.