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The sequence below is designed for a self-managed Nginx server. Adapt paths, PHP-FPM socket names, proxy addresses, and rate limits to your deployment, then validate every change with nginx -t before reloading.
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1. Inventory the stack before changing rules
Write down the operating system, Nginx release, PHP and PHP-FPM release, database engine and version, WordPress version, enabled plugins and themes, TLS termination point, document root, scheduled jobs, and backup destinations. Security work is easier when you know which service owns each request and which component must be patched.
Use supported platform versions
The current WordPress requirements page recommends PHP 8.3 or newer, MariaDB 10.11 or newer or MySQL 8.0 or newer, and HTTPS. Older PHP and MySQL branches can be end-of-life, which means known fixes may no longer be available from their maintainers. Confirm that your operating system repositories provide security updates for the exact versions you run; do not assume that an old distribution package is safe merely because it still starts.
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- Record the installed versions and their vendor support status.
- Update WordPress core, plugins, themes, PHP, the database, Nginx, and the operating system through a planned maintenance process.
- Remove unused plugins and themes instead of leaving abandoned code enabled.
- Take a restorable backup before major updates and verify the site afterward.
WordPress supports Nginx, and large WordPress installations use it successfully, but support for the web server does not make an unrestricted configuration safe.
2. Build a narrow Nginx-to-PHP-FPM boundary
Nginx should send only intended PHP scripts to PHP-FPM. Do not use a broad rule that treats every requested file as PHP, and do not copy Apache .htaccess rules into an Nginx configuration. Nginx does not read .htaccess; equivalent restrictions belong in the server or location blocks.
Set the document root and front-controller fallback
Replace the example path with the real directory that contains wp-admin, wp-content, and wp-includes:
server {
listen 443 ssl http2;
server_name example.com www.example.com;
root /var/www/example.com/public;
index index.php;
location / {
try_files $uri $uri/ /index.php?$args;
}
location ~ .php$ {
try_files $uri =404;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_pass unix:/run/php/php8.3-fpm.sock;
}
}try_files $uri =404 prevents a request for a nonexistent script from being handed to PHP-FPM. The socket name must match the PHP-FPM service installed on your server. If you use a TCP upstream instead of a Unix socket, define that upstream explicitly and restrict access to it.
Protect the configuration file
Add an exact match for wp-config.php so a mistake elsewhere cannot expose it as a downloadable file:
location = /wp-config.php {
deny all;
access_log /var/log/nginx/wp-denied.log;
log_not_found on;
}When practical, place wp-config.php one directory above the public document root, where WordPress can still load it. On the filesystem, allow only the owner and the web-server account or group to read secrets, and check ownership after updates. Permissions that are too open expose database credentials; permissions that are too restrictive can break updates or scheduled tasks.
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3. Deny hidden files and executable uploads
Attackers routinely probe for repository metadata, backup files, password files, and accidentally published operating-system artifacts. Deny dot-files while allowing the ACME challenge directory if your certificate automation needs it:
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location ~ /.(?!well-known).* {
deny all;
access_log /var/log/nginx/wp-denied.log;
log_not_found on;
}This blocks files such as .htaccess, .htpasswd, .git content, and .DS_Store. Review the exception before enabling it on a site that deliberately publishes another hidden path.
Make uploads data, never server code
Media directories should deliver images, documents, and other permitted data; they should not execute PHP. WordPress commonly stores uploads below wp-content/uploads. Multisite installations may also use a files path. Deny PHP requests in both locations:
location ~* ^/wp-content/uploads/.*.php$ {
deny all;
access_log /var/log/nginx/wp-denied.log;
log_not_found on;
}
location ~* ^/files/.*.php$ {
deny all;
access_log /var/log/nginx/wp-denied.log;
log_not_found on;
}Keep these locations alongside, and before testing, the general PHP location. A denied request should remain visible in an access log; those events can feed alerting or fail2ban-style controls. Do not silently discard them, because repeated probes are useful evidence.
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Also inspect writable directories created by plugins. If a plugin requires a special executable endpoint, document that exception and limit it to the exact path instead of enabling PHP throughout the directory.
4. Enforce HTTPS correctly
Redirect clear-text requests
Use a separate port-80 server that redirects to the canonical HTTPS host:
server {
listen 80;
server_name example.com www.example.com;
return 301 https://example.com$request_uri;
}Configure a valid certificate on the 443 server and test both the public site and administrative URLs. HTTPS must cover login credentials, cookies, and the dashboard, not just the home page.
Force secure administration in WordPress
Add this constant to wp-config.php:
define( 'FORCE_SSL_ADMIN', true );Use the canonical HTTPS URL in the WordPress and Site Address settings. Check that login, logout, password reset, media uploads, the REST API, cron callbacks, and embedded assets remain on HTTPS after the change.
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Add HSTS only when the whole scope is ready
HSTS tells browsers that honor it to use HTTPS automatically. Enable it only after every intended subdomain, redirect, API endpoint, and operational service is available over HTTPS. A typical one-year policy is:
add_header Strict-Transport-Security 'max-age=31536000; includeSubDomains' always;Treat that duration as an operational choice, not a prerequisite for WordPress. Once browsers cache HSTS, an incorrectly configured subdomain can become inaccessible over HTTP until the policy expires or is removed from the browser.
5. Handle a reverse proxy without redirect loops
In a CDN or load-balancer deployment, TLS may terminate before the request reaches Nginx. The proxy must pass the original scheme, commonly in X-Forwarded-Proto, and Nginx or WordPress must use it consistently. If WordPress believes an HTTPS request is HTTP, it can generate insecure URLs or redirect repeatedly.
Trust only your controlled proxy path
Configure the proxy to overwrite, not append to, the scheme header supplied by an untrusted client. On the origin, accept that header only from the proxy addresses or private network you control. Do not make every internet client authoritative for whether a request was encrypted.
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location ~ .php$ {
try_files $uri =404;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param HTTP_X_FORWARDED_PROTO $http_x_forwarded_proto;
fastcgi_pass unix:/run/php/php8.3-fpm.sock;
}WordPress can translate a trusted HTTPS indication for its own request handling. A common wp-config.php pattern is:
if ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) && 'https' === $_SERVER['HTTP_X_FORWARDED_PROTO'] ) {
$_SERVER['HTTPS'] = 'on';
}Use this only when the header is guaranteed to come from your controlled proxy. Test the origin directly, through the proxy, and through any health-check path, then check redirects and generated canonical URLs.
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6. Reduce login and brute-force abuse
Strengthen accounts first
- Give every administrator a long, unique password that is not reused elsewhere.
- Enable two-step authentication for administrator accounts.
- Use separate accounts for administration, publishing, and routine reading, with the least privilege each task needs.
- Remove dormant users and review administrator membership regularly.
- Restrict dashboard access by network or VPN when your organization can do so without blocking legitimate operations.
Apply measured Nginx rate limits
Nginx can slow repeated requests to login endpoints. The following is an example starting point, not a universal safe rate:
http {
limit_req_zone $binary_remote_addr zone=wp_login:10m rate=1r/s;
server {
location = /wp-login.php {
limit_req zone=wp_login burst=5 nodelay;
limit_req_status 429;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_pass unix:/run/php/php8.3-fpm.sock;
}
}
}Place the zone definition in the http context and tune the rate and burst from your traffic pattern. A shared office, mobile carrier, or IPv6 network can put many legitimate users behind one address. Monitor 429 responses before tightening the policy.
XML-RPC may be required by mobile apps, publishing clients, or integrations. If you rate-limit or restrict /xmlrpc.php, inventory those clients first and test them after the change. Blocking it blindly can break legitimate workflows; leaving it unrestricted can provide an attractive automated endpoint.
Use a server-layer rule set when appropriate
A web application firewall or ModSecurity deployment with the OWASP Core Rule Set can detect and block common malicious patterns before they reach WordPress. Treat signatures as a managed control: run in detection mode while tuning, review false positives, and keep the rule set updated. A WAF does not replace patching, authentication, or secure file permissions.
7. Disable high-risk administration features
WordPress includes a dashboard editor that can write plugin and theme PHP. Disable it so a stolen administrator session cannot immediately edit executable code:
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define( 'DISALLOW_FILE_EDIT', true );This does not prevent all file writes performed by plugins or deployment tooling. Keep plugin and theme installation under a controlled process, and avoid granting the web-server account broad write access to the entire document root. Test updates in a staging environment or maintenance window, because incorrect ownership can make legitimate updates fail.
Protect database credentials and salts in wp-config.php. Store secrets outside version control, audit who can read them, and rotate them when an administrator leaves or a backup is exposed.
8. Keep logs useful and actionable
Retain Nginx access and error logs, PHP-FPM logs, WordPress activity signals available in your environment, and authentication events. Include denied hidden-file and upload-PHP requests in a log that your monitoring system can search. Review spikes in requests to wp-login.php, xmlrpc.php, unusual status codes, new administrator accounts, and unexpected changes under wp-content.
Set retention according to your incident-response and privacy requirements. Forward copies to storage that an intruder who compromises the web account cannot erase. Alerts should identify the host, path, source address or proxy identity, status code, and time window so an operator can decide whether to block, investigate, or restore.
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Maintain independent backups of the database, uploaded media, themes, plugins, and configuration secrets. Keep at least one copy outside the web server and protect backup access with separate credentials. The appropriate frequency and retention depend on your recovery-point objective: a busy publishing site may need more frequent database copies than a rarely changed brochure site.
Test restoration separately
- Restore a backup into an isolated environment.
- Verify that the database, media, plugins, themes, and configuration agree on the site URL.
- Run the application through HTTPS and test login, publishing, media delivery, REST requests, and scheduled jobs.
- Record how long recovery took and update the runbook while the steps are fresh.
A backup that has never been restored is an assumption, not a recovery plan. Keep forensic copies when investigating compromise rather than overwriting the only evidence with a rushed restore.
10. Choose the operating model that fits your team
There is no universal best place to enforce every control. Decide who will patch, tune, observe, and recover the site.
| Control area | Self-managed Nginx | Managed WordPress hosting | Front-end WAF or CDN |
|---|---|---|---|
| Server configuration | You control Nginx, PHP-FPM, filesystem permissions, and network policy. | The host controls much of the server; confirm which directives and PHP settings are available. | It filters traffic before the origin but does not replace secure origin configuration. |
| Updates and patching | Your team schedules and verifies operating-system, Nginx, PHP, database, WordPress, plugin, and theme updates. | The provider may handle some layers; establish exactly what is included and what remains yours. | It can update detection rules, but origin software and WordPress code still require maintenance. |
| Logs and visibility | You can retain Nginx, PHP-FPM, system, and application logs according to your policy. | Visibility depends on the host’s export and retention features. | You gain edge request data, but must still retain origin logs for complete diagnosis. |
| Backups and recovery | You choose destinations, retention, encryption, and restoration tests. | Ask how often backups run, how long they are retained, and whether restores are operator-assisted. | Traffic filtering is not a backup; maintain independent origin and database copies. |
| Rate limiting and bots | Use Nginx limits, fail2ban-style automation, or a WAF you operate. | Use the controls exposed by the host and verify their effect on login, REST, XML-RPC, and multisite traffic. | Edge controls can absorb or challenge abusive requests before they reach the server. |
| TLS and HSTS | You configure certificates, redirects, proxy headers, and HSTS readiness. | The host may automate certificates; verify renewals, redirects, and subdomain coverage. | The edge may terminate TLS, but the origin and forwarded-scheme handling must remain correct. |
| Compatibility | You can tune rules for plugins, REST API clients, XML-RPC consumers, and multisite, but you own the testing. | Compatibility depends on platform restrictions and support processes. | Strict bot or firewall rules can block legitimate API and publishing clients unless exceptions are tested. |
Evaluate total operating cost in staff time, support, backups, and incident recovery rather than looking only at a hosting line item. Ask for evidence of the controls you actually need instead of assuming that a product label implies them.
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- Save a known-good Nginx configuration and a current backup.
- Run
sudo nginx -t. Do not reload if the test reports an error. - Reload during a controlled window with
sudo systemctl reload nginx. - Request the home page, representative permalinks, a static asset, and a nonexistent URL.
- Open
/wp-login.phpand/wp-admin/over HTTPS, then confirm that an HTTP request redirects. - Test a media upload and download; confirm that a harmless PHP-named file in uploads is denied rather than executed.
- Exercise the REST API, any XML-RPC-dependent client, cron, and multisite paths if they are enabled.
- Test through the reverse proxy and, where safe, from the origin network to detect scheme or trust mistakes.
- Review access, error, and PHP-FPM logs for unexpected 4xx, 5xx, redirect loops, or permission failures.
Keep a change record containing the reason, exact directive, test results, and rollback command. Environment-specific testing matters because a rule that is safe for a single-site install can break a plugin, API client, or multisite path.
12. A practical hardening checklist
- Supported WordPress, PHP, database, Nginx, and operating-system releases are installed.
- PHP requests go only to PHP-FPM, with nonexistent scripts rejected.
- Hidden files,
wp-config.php, and other secrets are denied or kept outside the public root. - PHP execution is denied below uploads and multisite file directories.
- HTTP redirects to HTTPS, administrative sessions require HTTPS, and proxy scheme handling is tested.
- HSTS is enabled only after every covered hostname is HTTPS-ready.
- Passwords are unique, two-step authentication is enabled, and privileges are minimized.
- Login and, where compatible, XML-RPC abuse is rate-limited or filtered.
- The dashboard file editor is disabled and filesystem ownership is reviewed after updates.
- Access and error logs are retained, monitored, and protected from tampering.
- Independent backups exist and restoration has been rehearsed.
- Every Nginx change has passed
nginx -tand functional tests.
The Bottom Line
A hardened WordPress-on-Nginx deployment is a maintained system, not a single rewrite rule. Keep the PHP boundary restrictive, make uploads non-executable, enforce and correctly detect HTTPS, limit abusive authentication traffic, protect configuration and editing paths, and prove that logs and backups work before an incident occurs.
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