Block request start from "?" symbol

[steamx]

OpenLiteSpeed 1.6.21

I tried to block DDoS requests like "/?12345" starting with ? symbol but cannot do this.
How I can block such requests? Context exp:^/\? or exp:^/? did not block it.

How I can do this?

 

[Unique_Eric]

Hi,
How about adding the following rules to the .htaccess and restart the webserver, it will block all request with QS

RewriteCond %{QUERY_STRING} !^$
RewriteRule .* - [F]

By the way, this forum is for LSWS, if you have more OpenLiteSpeed questions please go to https://forum.openlitespeed.org/.