![]() ![]() You get one of the specified errors on your website frontend or backend when performing certain actions/requests: 403 Forbidden, 500 Internal Server Error, 404 Not Found.Some simple steps to detect mod_security block are as follows: Once you have run into the issue with triggered by mod_security, the only way to bypass the block is to white-list this rule on the server. NOTE: Besides the 403 Forbidden error, you may also receive 404 Not Found or 500 Internal Server Error errors. When it happens, you still get a 403 error. ![]() Sometimes, due to poor website coding, mod_security may incorrectly determine that a certain request is malicious, while it is actually legitimate. These can be the ones that have been run to exploit vulnerabilities in your website software with the only goal to hack the site. ModSecurity works in the background, and every page request is being checked against various rules to filter out those requests which seem malicious. Depending on the exact link where you get the error, the path may vary. It simply states that you do not have permission to access / on the server. The most common error triggered by a mod_security rule on our shared servers is 403 Forbidden one: It comes with a Core Rule Set (CRS) which has various rules for: ModSecurity supports flexible rule engine to perform both simple and complex operations. The module is configured to protect web applications from various attacks. ModSecurity is an open-source web-based firewall application (or WAF) supported by different web servers: Apache, Nginx and IIS. Web application firewalls are deployed to establish an external security layer that increases the protection level, detects and prevents attacks before they reach web-based software programs. With over 70% of all attacks now carried out over the web application level, organizations need every help they can get in making their systems secure. What is ModSecurity and why do we need it? ![]()
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