The best WordPress firewall plugins are Wordfence, Sucuri, Kadence Security (formerly Solid Security), All-In-One Security, NinjaFirewall, Shield Security and MalCare. They block bad requests, bots and brute-force logins before they do damage. Which one fits depends on where the firewall runs: on your own server or at the network edge.
This guide explains the two firewall types, lists the plugins worth considering with what each is for, and shows how to pick one without stacking tools that fight each other.
Endpoint firewall or cloud firewall
Every WordPress firewall falls into one of two groups, and the difference matters more than any feature list.
Endpoint (plugin) firewalls
An endpoint firewall runs inside WordPress, on your own server. The plugin inspects each request after it reaches your site and blocks the bad ones. It sees your logins, your file changes and your plugin behaviour, so it can tie a request to what it would do inside WordPress. The cost is that malicious traffic still reaches your server and uses some of its resources before being stopped.
Cloud (DNS-level) firewalls
A cloud firewall sits in front of your site. You point your domain’s DNS at the firewall provider, traffic goes through their network, and only filtered requests reach your server. Attacks are stopped before they touch your hosting, which also takes load off the server. The trade-off is a DNS change, a dependency on a third party and less insight into what happens inside WordPress itself.
Several products offer both: a plugin for inside the site and a cloud layer for the edge. Using one of each is common and sensible. Running two plugin firewalls at once is not, because they can block each other’s requests and slow the site down.
What to look for in a firewall plugin
- Web application firewall rules. Rules that block known attack patterns such as SQL injection and cross-site scripting.
- Login protection. Rate limiting, lockouts and two-factor authentication to stop brute-force attempts.
- Malware scanning. A scan that compares your files to the originals and flags changes.
- IP and country controls. The ability to allow or block by address or region.
- Logs you can read. A firewall that blocks without telling you why is hard to trust or fix.
- Low overhead. Check how much work the plugin does on every page load, especially on shared hosting.
1. Wordfence Security
Wordfence is an endpoint firewall with a malware scanner and login security built into one plugin. A free version is available, and a paid version adds features such as real-time updates to its firewall rules. It is one of the most widely used security plugins for WordPress.
Best for: owners who want a firewall, scanner and login protection in a single plugin.
2. Sucuri
Sucuri Security is a free plugin for auditing, malware scanning and hardening. It is not the firewall itself. Sucuri’s firewall is a paid, cloud-based service that you set up through Sucuri’s website by changing your DNS. The plugin and the service work together, but they are separate products.
Best for: sites that want a cloud firewall in front of the server, plus a plugin for activity logs and hardening.
3. Kadence Security (formerly Solid Security)
The plugin once sold as iThemes Security and then Solid Security now appears in the directory as Kadence Security. It focuses on password policies, two-factor authentication and brute-force protection, with hardening options for common weak spots. Some features need a paid version.
Best for: sites where login security and user accounts are the main worry.
4. All-In-One Security (AIOS)
All-In-One Security bundles login protection, file change detection, a firewall and a security scanner in a plugin that is free to start with. It offers a graded set of firewall rules, so you can begin with the basic ones and add stricter rules as you test.
Best for: owners who want many controls and the option to turn them on gradually.
5. MalCare
MalCare pairs a malware scanner and cleaner with a firewall. Its scans run on its own servers rather than yours, which keeps the load off your hosting. Cleanup and some firewall features sit in paid plans.
Best for: sites on modest hosting where you want scanning done off-server.
6. Shield Security
Shield Security focuses on bot blocking, brute-force login protection and file scanning. It aims to work with little configuration, applying sensible defaults so you do not have to tune dozens of switches.
Best for: owners who want protection that works with few settings.
7. NinjaFirewall
NinjaFirewall (WP Edition) runs as a firewall that loads before WordPress itself, so it can inspect requests before WordPress starts running. That position gives it a different footing from plugins that load as part of WordPress. A free edition exists, and a paid edition adds more.
Best for: technical owners who want the firewall to sit ahead of WordPress inside the server.
8. Cloudflare
Cloudflare is an edge option rather than a plugin. You route your domain through its network, and it filters traffic before it reaches your server. It has a free plan and paid plans, and the official WordPress plugin helps connect the two. It also pairs well with an endpoint plugin from this list. If you only want bot protection on forms and logins, see how to add Cloudflare captcha on WordPress.
Best for: sites that want traffic filtered before it reaches the host, and extra capacity under attack.
9. Jetpack
Jetpack includes security features such as brute-force protection and downtime monitoring, along with backups, stats and other tools. Some features need a paid plan. It is more of a suite than a dedicated firewall.
Best for: owners who already use Jetpack and want basic protection from the same dashboard.
Comparison table
| Option | Type | Free version | Main strength |
|---|---|---|---|
| Wordfence | Endpoint plugin | Yes | Firewall, scanner and login security together |
| Sucuri | Plugin plus cloud service | Plugin is free, firewall is paid | Cloud firewall at the edge |
| Kadence Security | Endpoint plugin | Yes | Login and account protection |
| All-In-One Security | Endpoint plugin | Yes | Graded firewall rules and many controls |
| MalCare | Plugin with off-server scanning | Yes | Scans run off your server |
| Shield Security | Endpoint plugin | Yes | Bot blocking with simple setup |
| NinjaFirewall | Pre-WordPress firewall | Yes | Filters before WordPress loads |
| Cloudflare | Cloud (DNS-level) | Yes | Edge filtering and traffic absorption |
| Jetpack | Suite | Yes | Basic protection with other tools |
How to choose a WordPress firewall
Start with the problem you actually have:
- Brute-force login attempts: any of the endpoint plugins above handles this. Add two-factor authentication for every admin account.
- Traffic spikes and bot floods that slow your host: a cloud firewall such as Cloudflare or Sucuri’s service stops the load before it arrives.
- A site already infected: use a scanner and cleaner first, then add a firewall. A firewall does not remove malware that is already in your files.
- Shared hosting with little headroom: look at plugins that do heavy work off-server, or a cloud layer, so your host does less.
A sensible baseline is one endpoint plugin plus one edge layer, both set up with care. Add a backup plugin so you can recover from the things no firewall catches, and keep WordPress, themes and plugins updated. Our guides to firewall and brute-force protection plugins, WordPress security plugins and security plugins cover more options, and free backup plugins covers the recovery side.
How to set up a firewall without locking yourself out
- Back up first. A fresh copy of your files and database gives you a way back if a rule breaks something.
- Install one plugin and leave the defaults on. Strict rules are tempting, but start with the basic ones and watch the logs.
- Whitelist your own IP address if your plugin allows it, and keep the plugin’s recovery instructions where you can reach them without the site.
- Turn on two-factor login for every administrator and editor account.
- Test the paths that matter. Log in, submit a form, check out if you run a shop and confirm that payment and email callbacks still arrive.
- Tighten one rule at a time. If something breaks, you know which change caused it.
If you add a cloud firewall, change DNS during a quiet period and keep the old records noted down. DNS changes take time to spread, so a rushed switch is hard to roll back. Check that the real visitor IP still reaches your security plugin, because traffic passing through a proxy can make every visitor look like the same address.
Mistakes to avoid
- Running two firewall plugins. Pick one endpoint firewall. Overlapping rules cause false blocks and slow pages.
- Blocking yourself. Whitelist your own IP and note the recovery steps before you switch on strict rules.
- Ignoring the logs. Look at what is being blocked for the first week. Legitimate payment callbacks or API calls can get caught.
- Treating a firewall as the whole plan. Weak passwords, outdated plugins and missing backups still sink a site.
- Letting emails leak admin names. Attackers harvest usernames and addresses. Read how hackers mine WordPress for admin emails and close the gaps.
Frequently asked questions
What is the best firewall plugin for WordPress?
Wordfence is the most common choice for an all-in-one endpoint firewall, scanner and login protection. If you want filtering before traffic reaches your server, add a cloud option such as Cloudflare or Sucuri’s firewall service.
What is the difference between a plugin firewall and a cloud firewall?
A plugin firewall runs inside WordPress on your server, while a cloud firewall filters traffic at the network edge before it reaches you. The plugin sees more of what happens inside WordPress. The cloud option takes load off your host.
Is the free version of a firewall plugin enough?
For many small sites, yes. Free versions block common attacks and protect logins. Paid versions typically add faster rule updates, extra features and support, so decide based on how much risk your site carries.
Can I run two security plugins at the same time?
Avoid running two plugins that both act as a firewall. They can clash, cause false blocks and slow the site. One endpoint plugin plus a cloud layer works well because they act at different points.
Will a firewall plugin slow my site down?
Endpoint firewalls add some work on each request. A cloud firewall can make a site feel faster under attack because bad traffic never reaches your server. Test your page speed before and after you install one.
Does a firewall remove malware?
No. A firewall blocks new attacks. Cleaning malware that is already on your site needs a scanner and cleaner, and often a restore from a clean backup.
What happened to Solid Security and iThemes Security?
The plugin sold as iThemes Security, later Solid Security, now appears in the WordPress directory as Kadence Security. It is the same line of plugin under a new name.
Next step
Choose one endpoint plugin, switch on two-factor login for your admins, and decide whether you need a cloud layer in front. Then confirm that you have a working backup. Read our security plugin guide to compare the wider options.