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NGINX and Apache can run on the same server when they do not try to bind the same IP address and TCP port. To expose NGINX on port 8080, configure a server block with listen 8080; (or the narrower listen 127.0.0.1:8080;), then move Apache to a different unused endpoint such as 127.0.0.1:8081. If NGINX is the public front end, a more usual arrangement is NGINX on ports 80 and 443 and Apache on a loopback-only port such as 8080, with proxy_pass forwarding requests to it.
The essential rule is simple: one process per address-and-port pair. The rest of the configuration determines which daemon is public, whether NGINX serves files or proxies them, how virtual hosts are selected, and whether redirects and client IP information remain correct.
What it means to run both daemons
A listening socket is identified by an IP address and a TCP port. Two independent processes cannot normally claim the same pair. NGINX listening on 0.0.0.0:8080 conflicts with Apache listening on 0.0.0.0:8080, but they can coexist if one uses port 8080 and the other uses 8081, or if they use different addresses such as a public address and loopback.
An omitted address in an NGINX listen directive means all local addresses. Binding to 127.0.0.1 restricts connections to the same host. That distinction matters: a loopback-only Apache backend is not directly reachable from the network, while an NGINX listener on all addresses can accept remote requests if the firewall permits them.
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Choose the layout before editing files
There are two practical designs and one special case. Select the one that matches who should receive traffic first.
| Layout | Public listener | Apache endpoint | NGINX role | When to use it |
|---|---|---|---|---|
| NGINX exposed on 8080 | NGINX on :8080 |
Apache on 127.0.0.1:8081 or another free port |
Serves a site directly or proxies selected paths | The requirement explicitly calls for NGINX at port 8080 |
| NGINX front end | NGINX on ports 80 and/or 443 | Apache on 127.0.0.1:8080 |
Terminates TLS, serves static files, and reverse-proxies dynamic requests | A public website should have one front door while Apache remains private |
| Independent sites | Each daemon owns a different address-and-port pair | Apache is directly reachable on its own endpoint | Does not proxy Apache | Separate applications or a migration where both servers are intentionally public |
For a quick test, the first layout is sufficient. For production, the second layout usually reduces exposure: Apache listens only on loopback and NGINX is the sole public entry point. Do not publish both daemons merely because both are installed.
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Inspect existing listeners first
Before changing a configuration, record what currently owns ports 80, 443, and 8080. A port that appears free in a configuration file may already be held by a running process or a container.
sudo ss -ltnp
sudo lsof -nP -iTCP:80 -sTCP:LISTEN
sudo lsof -nP -iTCP:443 -sTCP:LISTEN
sudo lsof -nP -iTCP:8080 -sTCP:LISTEN
sudo systemctl status nginx apache2On systems that name the service httpd rather than apache2, use that service name in status and reload commands. Write down the address as well as the port. For example, 127.0.0.1:8080 and 192.0.2.10:8080 are different bindings, while a wildcard listener such as 0.0.0.0:8080 generally covers every IPv4 address on the host.
Layout A: NGINX on 8080 and Apache on 8081
This arrangement leaves NGINX at the requested port and moves Apache to a separate loopback endpoint. The examples use Ubuntu or Debian file locations; other distributions may use different paths, but the directives are the same.
1. Select the Apache address and port
Use an unused pair, such as 127.0.0.1:8081. Loopback is preferable when Apache should be reachable only by NGINX or local administration. If another local service already owns 8081, choose another free port and use it consistently in every file.
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2. Change Apache’s Listen directive
On Ubuntu, Apache’s port declarations are normally in /etc/apache2/ports.conf. Replace the old public declaration with the selected endpoint. For a loopback-only backend:
Listen 127.0.0.1:8081The Listen directive specifies the port and, optionally, the IP address Apache should accept. If the file contains several Listen lines, remove or change the ones that would collide with another daemon. Keep any additional ports that are deliberately used for separate sites.
3. Match every Apache virtual host
Changing Listen alone is not enough. Apache virtual hosts still naming the old endpoint can fail validation or select the wrong site. Edit the relevant files under /etc/apache2/sites-available/ so their bindings match:
<VirtualHost 127.0.0.1:8081>
ServerName example.com
DocumentRoot /var/www/example
<Directory /var/www/example>
Require all granted
</Directory>
</VirtualHost>Use the real host name and document root for the application. If a site is not meant to answer on this endpoint, disable its old virtual-host file rather than leaving a stale binding. On Ubuntu or Debian, enable the intended site with sudo a2ensite site-name.conf when necessary.
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Create or edit the appropriate NGINX server block. This example serves files directly:
server {
listen 8080;
server_name example.com;
root /var/www/example;
index index.html index.htm;
}listen 8080; accepts connections on port 8080 on the host’s local addresses. To restrict NGINX to local clients, use listen 127.0.0.1:8080; instead. If remote users should reach the site, retain a public address binding and allow TCP 8080 in the host and cloud firewalls.
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5. Validate before reloading
Test both configurations before asking the service manager to reload them:
sudo apachectl configtest
sudo nginx -tApache should report a successful syntax check, and NGINX should report that the configuration test is successful. Fix every error before reloading. Then apply the changes without stopping the daemons:
sudo systemctl reload apache2
sudo systemctl reload nginxIf your distribution uses httpd, substitute sudo systemctl reload httpd. A reload keeps existing workers serving current connections while new workers use the new configuration; a restart is more disruptive and should be reserved for cases where a reload cannot apply the change.
6. Verify the exact endpoint
Confirm the sockets after reloading, then request the URL including its non-default port:
sudo ss -ltnp | grep -E ':(8080|8081)b'
curl -i http://127.0.0.1:8080/
curl -i http://127.0.0.1:8081/The first request should reach NGINX and the second should reach Apache directly from the server. If Apache is loopback-only, a curl request made from another machine to port 8081 should fail by design. For a public NGINX listener, test from a separate network and use http://example.com:8080/; browsers omit the port only for their default HTTP and HTTPS ports.
Layout B: NGINX as the public reverse proxy
When NGINX should own the front door, put it on port 80 for HTTP and, if TLS is enabled, port 443 for HTTPS. Apache listens on a private loopback port such as 8080. NGINX then forwards requests to Apache instead of exposing Apache directly.
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1. Put Apache on loopback 8080
In Ubuntu, set the port in /etc/apache2/ports.conf:
Listen 127.0.0.1:8080Change each corresponding Apache virtual host to <VirtualHost 127.0.0.1:8080>. Apache will still see the request after NGINX forwards it, but the network cannot connect to that backend port unless access is local to the server.
2. Add the NGINX proxy server block
Use a location block containing proxy_pass:
server {
listen 80;
server_name example.com;
location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://127.0.0.1:8080;
}
}The upstream port in proxy_pass must exactly match Apache’s address and port. The Host header lets Apache and the application select the intended virtual host. The other headers preserve the original client address and whether the browser used HTTP or HTTPS. Configure the application to trust forwarded headers only from your NGINX proxy; blindly trusting client-supplied forwarding headers can make logs and access controls unreliable.
3. Add HTTPS without exposing Apache
If NGINX terminates TLS, the HTTPS server block listens on 443 and proxies to the same loopback backend. The backend connection can remain HTTP on the private host unless you have a specific requirement for encryption between local processes:
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listen 443 ssl;
server_name example.com;
ssl_certificate /path/to/fullchain.pem;
ssl_certificate_key /path/to/private.key;
location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://127.0.0.1:8080;
}
}Use the certificate paths and TLS settings appropriate for your installation. If port 80 redirects to HTTPS, make that redirect in the NGINX HTTP server block so the browser sees the public host and port rather than Apache’s private endpoint.
4. Account for redirects and absolute URLs
An application may generate a redirect using its own view of the request. Without the forwarded host and scheme, it can redirect users to 127.0.0.1:8080, to an internal port, or repeatedly from HTTPS to HTTP. Verify the application’s base URL and its trusted-proxy setting. When a proxy emits or rewrites backend Location headers, review Apache’s reverse-proxy behavior and use the appropriate ProxyPassReverse arrangement if Apache itself is proxying another service. The objective is that every public redirect points to the public scheme, host, and port.
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How NGINX selects the server block
NGINX first selects a default server for the address and port that accepted the connection. It then compares the request’s Host header with each server_name on that listener. A request to example.com:8080 can therefore select a different block from a request to an unrecognised host on the same port.
Give each site a unique name and avoid accidental duplicate default_server declarations on one address-and-port pair. If no name matches, the default block answers. A browser using an IP address sends that IP in the Host header, so it may intentionally reach the default rather than the named virtual host.
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Address binding, firewall, and exposure decisions
- All-address binding:
listen 8080;can expose NGINX on every local address. Use it only when remote access is intended and filter the port with host and cloud firewall rules. - Loopback binding:
listen 127.0.0.1:8080;accepts local connections only. This is appropriate for a backend or a development-only service. - IPv6: Check whether your distribution adds an IPv6 listener such as
[::]:8080. An IPv4 rule does not automatically describe every IPv6 binding, and an IPv6 wildcard can expose a service unexpectedly. - Firewall consistency: Opening TCP 8080 in a firewall does not help a service bound only to loopback. Conversely, a public listener may still be unreachable if the host or cloud firewall blocks the port.
- Least exposure: If NGINX proxies Apache, do not open Apache’s backend port externally. Restrict it to loopback or a private interface used only by the proxy.
Distribution and file-layout differences
Ubuntu and Debian commonly separate Apache’s global port declarations in /etc/apache2/ports.conf and virtual hosts in /etc/apache2/sites-available/, with enabled links under /etc/apache2/sites-enabled/. Other distributions may keep Apache configuration under /etc/httpd/, and NGINX server blocks may live in a distribution-specific directory. Do not copy a path blindly; locate the active configuration with the service’s package documentation or its startup command, then apply the same Listen, <VirtualHost>, listen, and proxy_pass relationships.
The service names also vary. Ubuntu commonly uses apache2 and nginx; Red Hat-family systems commonly use httpd and nginx. The configuration test and reload must target the daemon actually installed on the host.
Troubleshoot the common failures
| Symptom | Likely cause | Checks and fix |
|---|---|---|
| “Address already in use” | Another process owns the same address-and-port pair, or duplicate listen directives exist. | Run ss -ltnp and identify the owner. Change one Listen/listen endpoint or stop the conflicting service. Do not solve it by adding another identical binding. |
| NGINX works on localhost but not remotely | NGINX is intentionally bound to loopback, or a firewall blocks TCP 8080. | Check the exact address in ss. If remote access is required, bind to the appropriate interface and allow the port in both host and cloud firewalls. |
| NGINX returns 502 Bad Gateway | Apache is stopped, listening elsewhere, or inaccessible at the address in proxy_pass. |
Check Apache status, run ss -ltnp, and curl the backend locally. Make the Apache Listen, virtual-host binding, and NGINX proxy_pass value identical. |
| Apache redirects to 8081 or another private port | The application constructs URLs from the backend request, or proxy headers and redirect rewriting are incomplete. | Pass Host and X-Forwarded-Proto, set the application’s public base URL, and inspect redirect Location headers. If Apache is itself proxying, configure the required reverse redirect handling. |
| The wrong NGINX site appears | The request matched the default server, a duplicate default exists, or the Host header does not match server_name. |
Review all server blocks on that port, keep one deliberate default, and test with the intended host name using curl. |
| Apache fails after the port change | A virtual host still names the old endpoint, or the new port is already occupied. | Run apachectl configtest, search enabled site files for the old binding, update every matching <VirtualHost>, and verify the new socket is free. |
| Requests reach Apache directly | The backend is bound to a public address or its firewall rule permits external traffic. | Bind Apache to 127.0.0.1 or a private interface and remove public firewall access to the backend port. |
Operational checklist
- Record current owners of ports 80, 443, and 8080 before editing.
- Choose one address-and-port pair for every daemon and document whether it is public or loopback-only.
- Keep Apache’s
Listendirective and every matching<VirtualHost>declaration in agreement. - Keep NGINX’s
listen,server_name, and anyproxy_passdestination internally consistent. - Use unique server names and one intentional default server per listener.
- Preserve the original host, client address, and scheme when proxying.
- Run both configuration tests before each reload and inspect service status afterward.
- Test locally and from the intended client network, using the explicit port when it is not 80 or 443.
- Keep Apache’s backend port closed to external clients when NGINX is the public front end.
Which configuration should you use?
Use NGINX on :8080 and Apache on 127.0.0.1:8081 when port 8080 is the required public endpoint or when you are testing NGINX independently. Use NGINX on 80/443 with Apache on 127.0.0.1:8080 when NGINX should terminate TLS, enforce public host names, serve static content, and proxy application requests. In either case, the configuration succeeds only when the bindings are distinct, all virtual-host declarations match the selected ports, and each daemon is reloaded only after its syntax test passes.
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