Pro · Cloud Firewall
WP Security Ninja
Stop scanners that flood your site with 404s
Aggressive bots probe fake paths looking for backups and old plugins. 404 Guard watches the pattern and blocks the IP, safely for real users and search engines.
- ✓ Pattern-based blocks
- ✓ SEO crawlers allowed
- ✓ Less server noise
YouTube channel
Watch the walkthrough
See how 404 Guard stops scanners that flood your site with 404 errors.
404 Guard
How 404 Guard protects you
It counts 404 responses per IP inside a time window you control. Cross the threshold, and that IP is blocked before it wastes more resources.
- ✓ Configurable threshold and window
- ✓ Targets probing behavior, not one-off typos
- ✓ Included with Security Ninja Pro / Cloud Firewall
Safe for humans and search engines
Real visitors mistype URLs. Search crawlers explore. 404 Guard is built to allow known good crawlers while stopping noisy scanners.
- ✓ Designed to avoid SEO fallout
- ✓ Works alongside country and IP rules
- ✓ Review activity in the visitor log
Customer reviews
4.9 / 5 from 254 reviews
★★★★★
“Great plugin! Allowed me to save a lot of time”
★★★★★
“Hi, I bought Security Ninja and Login Ninja. I must say they’re great and my website is much more secure now. I had quite a lot of security issues on my website, but they’re all fixed now thanks to the plugin.”
★★★★★
“Exceptionally awesome.”
Frequently asked questions
Is 404 Guard free?+
No. It is part of Security Ninja Pro’s Cloud Firewall suite.
Will it block Google?+
Known search crawlers are allowed. The goal is to stop abusive scanners, not legitimate indexing.
Cut bot noise with Pro
404 Guard plus Cloud Firewall, malware scanning, and login protection.
Get Pro