How to block No-user-agent browsers and browser with Tachiyomi user agent on my website using .htacess

Question

tachiyomi keeps adding and removing user agents to get access to my website, so I want to add multiple user agents at the same time to get the things done

I know that I can use

RewriteCond %{HTTP_USER_AGENT} ^-?$
RewriteRule ^ - [F]

and

RewriteCond %{HTTP_USER_AGENT} Tachiyomi [NC]
RewriteRule ^ - [F]

but how to include both in the same?

Answer 1

Use the OR flag on the RewriteCond directive. For example:

RewriteCond %{HTTP_USER_AGENT} ^-?$ [OR]
RewriteCond %{HTTP_USER_AGENT} Tachiyomi [NC]
RewriteRule ^ - [F]

So the above rule is successful when the User-Agent string is either empty or a single hyphen OR contains "Tachiyomi" (case-insensitive).

Without the OR flag, the conditions are implicitly AND'd.

Multiple flags are separated by a comma (there must be no spaces). eg. [NC,OR]. The order of the flags do not matter.

NB: You must not use the OR flag on the very last condition, otherwise the rule will always be successful.

Reference:

• https://httpd.apache.org/docs/current/mod/mod_rewrite.html#rewritecond