How to test/debug .htaccess ModRewrite rules to work with LiteSpeed?

[acquire996]

My .htaccess is pretty big and contains many ModRewrite conditions, mainly thanks to perishablepress.com/8g-firewall/
I have been told that at least some part of this Apache firewall is not compatible with LiteSpeed, particularly my hosting provider suggested replacement of a 8G .htaccess line:

RewriteCond %{QUERY_STRING} (;|<|>|\'|\"|\)(%0a|%0d|%22|%27|%3c|%3e|%00)(.*)(/\*|alter|base64|benchmark|cast|concat|convert|create|encode|declare|delay|delete|drop|hex|insert|load|md5|null|replace|request|script|select|set|sleep|truncate|unhex|update) [NC,OR]

by:

RewriteCond %{QUERY_STRING} (;|<|>|'|"|)(%0a|%0d|%22|%27|%3c|%3e|%00)(.*)(/\*|alter|base64|benchmark|cast|concat|convert|create|encode|declare|delay|delete|drop|hex|insert|load|md5|null|replace|request|script|select|set|sleep|truncate|unhex|update) [NC,OR]

(removed 3 backslashes on the beginning)

saying "made the server silently ignore the whole block". That seems serious. Question is what they mean by whole block, if it is a line or also all following lines (or also preceding) lines till the last line " RewriteRule .* - [F]"

Full 8G I have pasted here for convenience: justpaste.it/gbc2e

I have been thinking if i should create some overriding rule on the top of my .htaccess so on next .htaccess firewall code update, when i paste non working rules, it will override those non working.

Second question as a total newbie with zero regular expression knowledge is:

Please how to exactly debug (not being server admin), if and where exactly there is any syntax error according to LiteSpeed. I know how to enable PHP error logging using .htaccess, but that is likely not it?

litespeedtech.com/docs/webserver/config/rewrite#rewriteLogLevel

 

[serpent_driver]

If you are the license owner for LSWS, login to LiteSpeed user panel and ask for support. Otherwise or if you are not the server admin you can't debug it.