---
title: How to Configure Apache as a Reverse Proxy with mod_proxy
description: Apache is a powerful and versatile web server that can also act as a reverse proxy, forwarding client requests to backend servers. Setting up Apache as a reverse proxy enhances security, simplifies client access to multiple services, and improves load…
url: "https://truehost.com/support/knowledge-base/how-to-configure-apache-as-a-reverse-proxy-with-mod_proxy/"
updated: "2025-04-09"
category: Cloud servers in Kenya
---

# How to Configure Apache as a Reverse Proxy with mod_proxy

Apache is a powerful and versatile web server that can also act as a reverse proxy, forwarding client requests to backend servers. Setting up Apache as a reverse proxy enhances security, simplifies client access to multiple services, and improves load balancing. Here’s a simplified guide to configure Apache as a reverse proxy using the **mod_proxy** module.

### **What You’ll Need**

1. A fresh Linux server (e.g., Ubuntu 20.04) with Apache installed.
2. A DNS “A” record pointing to your server's IP (e.g., `app.example.com`).
3. Docker installed to host backend applications like ownCloud.
4. A non-root user with sudo privileges.

### **Step 1: Enable Required Modules**

Apache uses several modules for reverse proxying. Start by enabling these:

```
sudo a2enmod proxy
sudo a2enmod proxy_http
sudo a2enmod proxy_balancer
sudo a2enmod proxy_wstunnel
```

- **mod_proxy**: Core proxying functionality.
- **proxy_http**: Handles HTTP/HTTPS requests.
- **proxy_balancer**: Adds load-balancing capabilities.
- **proxy_wstunnel**: Facilitates WebSocket tunneling.

Restart Apache to apply changes:

```
sudo systemctl restart apache2
```

### **Step 2: Set Up a Backend Application**

For this example, we’ll use ownCloud hosted in a Docker container:

```
docker run -d --name owncloud -p 8080:8080 owncloud/server
docker start owncloud
```

Verify that ownCloud is running:

```
docker ps
```

### **Step 3: Configure Apache as a Reverse Proxy**

**Back Up the Default Configuration**:

```
sudo mv /etc/apache2/sites-available/000-default.conf /etc/apache2/sites-available/origdefault.backup
```

**Create a New Configuration File**:

```
sudo nano /etc/apache2/sites-available/app.example.com.conf
```

Add the following content, replacing `app.example.com` with your domain:

```
<VirtualHost *:80>    ServerName app.example.com    ProxyPreserveHost On    ProxyPass / http://127.0.0.1:8080/    ProxyPassReverse / http://127.0.0.1:8080/</VirtualHost>
```

- **ProxyPreserveHost**: Forwards the original host header to the backend.
- **ProxyPass**: Routes client requests to the backend server.
- **ProxyPassReverse**: Adjusts response headers from the backend.

**Activate the Configuration**:

```
sudo ln -s /etc/apache2/sites-available/app.example.com.conf /etc/apache2/sites-enabled/app.example.com.conf
```

**Test and Restart Apache**:

```
sudo apachectl configtestsudo systemctl restart apache2
```

### **Step 4: Secure the Server**

Allow HTTP and HTTPS traffic:

```
sudo ufw allow 80/tcpsudo ufw allow 443/tcpsudo ufw reload
```

Install SSL certificates for secure connections:

```
sudo apt install certbot python3-certbot-apachesudo certbot -d app.example.com
```

Test automatic SSL renewal:

```
sudo certbot renew --dry-run
```

### **Step 5: Verify the Setup**

Open a browser and navigate to `https://app.example.com`. If everything is configured correctly, you’ll see the backend application's interface (e.g., ownCloud login page).

### **Benefits of Using Apache as a Reverse Proxy**

- **Improved Security**: Shields backend servers from direct exposure.
- **Centralized Access**: Simplifies client access to multiple services.
- **Load Balancing**: Distributes traffic effectively.
- **Flexibility**: Supports various backend applications.

By following these steps, you’ve successfully set up Apache as a reverse proxy with **mod_proxy**, providing a robust and secure infrastructure for your applications.