An apache module that helps to secure your website from several attacks is called Mod_security. Commonly known exploits are blocked with mod_security by using regular expressions and rule sets. It helps in strengthening the security of your servers by potentially blocking common code injection attacks.
No doubt mod-security can be useful when properly configured but many hosting providers don’t do this job correctly leading to problems. The commonly faced problems include triggering of security protocols on standard actions which should be allowed, 403 or 404 errors, access denied error, login issues, unable to modify categories and boards or similar problems.