Article 5PCF7 client initial SYN packet intermittently ignored.....resulting in sloooowwwww website

client initial SYN packet intermittently ignored.....resulting in sloooowwwww website

by
Notsobigkev
from LinuxQuestions.org on (#5PCF7)
Hi, I am running Ubuntu 21.04 (have nothing to compare to previous vers) with Apache2 and am trying to launch a web server. I find when I connect to the server it will intermittently not respond to the initial client's SYN packet. This can be seen on Tshark traces. I have searched various forums which now suggest that parameters in /etc/sysctl may need tweaking.(still no joy) All attempts to fix have failed.
Would anyone have any other ideas on areas to address to effect a fix ?? I can't believe this a generic problem on 21.04. I have discounted a problem with internet access, routers etc

Should I bite the bullet and load up Fedora or Centos. ??

Windows, as a matter of principle, is not an option.

Still investigating.......

Many thanks

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