Forever free
Free
Basic 8G request filtering for common exploit patterns, included with the free plugin.
- 8G-based request filtering
- Blocks many malicious query patterns
- Works with free security tests and vuln scanning
- No Pro license required
Pro · First line of defense
WP Security Ninja
Stop attackers before they reach WordPress
Cloud Firewall filters malicious requests, blocks IPs with a known history of abuse, and lets you control countries or custom ranges before WordPress loads.
- ✓ Blocks junk before WordPress loads
- ✓ 600M+ bad IPs
- ✓ Country & IP rules
How it works
Block junk requests. Let real visitors through.
Cloud Firewall filters common attack patterns and checks visitors against a cloud blocklist before WordPress loads.
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Filter requests
Suspicious query strings, upload abuse, and common exploit patterns are stopped early.
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Block known bad IPs
Pro checks a cloud list of 600M+ known bad IPs, updated daily in the background.
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WordPress stays quiet
Most automated attacks never load WordPress, so your server and login form do less unnecessary work.
What you get in practice
- Blocks junk before WordPress loads
- Updates daily
- Whitelists monitoring tools
- Review every block
See what the firewall blocked
The Pro visitor log shows who hit your site, what was allowed, and what Cloud Firewall stopped, so you can tune rules and spot false positives fast.
- ✓ Traffic and firewall decisions in one place
- ✓ Useful when a customer or webhook gets blocked
- ✓ Pairs with Events Logger and webhooks on Pro
Keep malicious traffic off your site
Stopping bad traffic before WordPress loads saves server resources. Pro Cloud Firewall combines request filtering with cloud intelligence updated daily.
- ✓ Block 600M+ known bad IPs
- ✓ Filter SQL injection, upload abuse, and common exploit patterns
- ✓ Redirect blocked visitors or show your own message
Country and IP control you understand
Block countries you do not serve, manage blacklist and whitelist rules, and rely on built-in service whitelists so monitoring tools are less likely to get blocked.
- ✓ Searchable IP management on Pro
- ✓ Automatic service IP whitelists
- ✓ Temporary blocks when you need them
Pairs with login protection and 404 Guard
Firewall stops noisy traffic. Login protection and 2FA harden sign-in. 404 Guard blocks IPs that hammer missing URLs looking for holes.
- ✓ Failed-login limits and rename login
- ✓ Two-factor authentication
- ✓ 404 Guard for aggressive scanners
Free vs Pro
Free gets a basic firewall. Pro adds the cloud list.
Every Security Ninja install can filter common malicious requests. Upgrade for the cloud bad-IP database, country rules, and the visitor log.
Recommended
Pro
Cloud Firewall with a cloud bad-IP list, country and IP controls, and the tools that show what was blocked.
- Everything in Free
- 600M+ known bad IPs, updated daily
- Country blocking and IP management
- 404 Guard, visitor log, service whitelists
Built for automated attacks on WordPress
Most attack traffic comes from bots. Cloud Firewall blocks much of it before WordPress loads, so there is less junk to investigate.
Freelancers and site owners
Turn on the cloud list, save the secret access URL, and block many bots before they hammer login or random URLs.
Agencies
Use Pro on each client site, then review blocks in the visitor log when something looks wrong.
WooCommerce and local businesses
Use country rules carefully for markets you do not serve, whitelist payment and monitoring IPs, and keep checkout tested after changes.
Customer reviews
4.9 / 5 from 262 reviews
“Security Ninja has improved massively over the last year. The plugin keeps getting better and more powerful, and it has become an important part of how I manage WordPress security…”
One of my best purchases
“So I end up purchasing quite a few accounts here. Most are just sitting on the shelf, hoping that someday they will mature enough to be worth it.”
Excellent Plugin
“Security Ninja has everything and more of what you’d want in a security plugin. Some examples are the firewall, limited login attempts, malware scanner, logs, and alerts.”
So Glad to Find This
“WP Security Ninja Review I've been using WP Security Ninja for several weeks now, and I must say, it has exceeded all my expectations.”
Frequently asked questions
What is a WordPress firewall (WAF)? +
A WordPress firewall is a web application firewall for your site. It inspects incoming requests and blocks suspicious or known-bad traffic before WordPress loads. Security Ninja Free includes basic 8G request filtering. Pro Cloud Firewall adds a cloud list of 600M+ known bad IPs, country rules, and IP controls.
Is Security Ninja the same as NinjaFirewall / ninjafirewall? +
No. NinjaFirewall by NinTechNet is a different WordPress security product. See our Security Ninja vs NinjaFirewall comparison if you are choosing between them.
Do I need a WordPress firewall if I already use Cloudflare or a host WAF? +
Often yes. Edge and host WAFs stop a lot of traffic before it reaches your server. A plugin firewall can still apply WordPress-aware rules and show activity inside wp-admin. Many sites use both, as long as the rules do not conflict. See our WordPress firewall plugins guide for details.
Is there a free WordPress firewall in Security Ninja? +
Yes. Free includes a basic 8G firewall that filters common malicious request patterns. The cloud bad-IP database, country blocking, visitor log, and 404 Guard are Pro features.
What does Security Ninja Cloud Firewall block? +
Pro blocks visitors on a cloud list of 600M+ known bad IPs, filters common attack patterns, and can enforce country and custom IP rules. You can show a message to blocked visitors or redirect them. Login protection and 404 Guard are also included with Pro.
Will Cloud Firewall block Google, SEO crawlers, or real customers? +
It is built to allow legitimate traffic and known good crawlers where validation applies. You can whitelist IPs, use built-in service whitelists for many monitoring tools, and review blocks in the visitor log. After enabling country rules, test login, checkout, and important webhooks.
Will a WordPress firewall slow my site down? +
Blocking junk early usually means less work for WordPress and your database. Running several firewall plugins can cause conflicts, so use one primary plugin firewall.
How do I stop brute-force login attacks on WordPress? +
Use Pro login protection to limit failed logins and optionally rename the login URL, then add 2FA for roles that matter. Cloud Firewall’s bad-IP list also reduces how often known attackers reach the form.
Can I block a country in WordPress? +
Yes on Pro. Country blocking uses IP2Location LITE data and lets you choose countries to block, including login-only options depending on your settings. Accuracy is good but not perfect, and VPNs can bypass country rules.
What if the firewall locks me out of WordPress? +
Before you enable Pro Cloud Firewall, save the secret access URL from the setup popup (you can email it to yourself). Whitelist your office or home IP when you can. Security Ninja includes recovery docs for the secret access URL and restoring access if you get locked out.
Does a firewall replace plugin updates or malware scanning? +
No. A firewall reduces unwanted attack traffic. It does not patch vulnerable plugins or remove malware already on the site. Keep WordPress, plugins, and themes updated. Use the free vulnerability and core checks, and Pro malware scanning when you need file-level cleanup.
Where do I see what Cloud Firewall blocked? +
On Pro, use the visitor log for traffic and firewall decisions, and the Events Logger for security activity. You can also push alerts with webhooks to Slack, Discord, or Zapier.
Will country blocking break WooCommerce payments or webhooks? +
It can, if payment gateways, CRMs, or other services call your site from a blocked country or IP. Whitelist required service IPs, prefer careful country rules, and test checkout after changes. Pro also includes WooCommerce rate and coupon protection alongside the firewall.
Put a real firewall in front of WordPress
Pro Cloud Firewall, login protection, malware scanning, and more start on the pricing page. Still comparing options? Read the WordPress firewall plugins guide first.
Get Pro