What is a Reverse Proxy? How It Works and Why You Need It

Proxy servers are a well-known technology among IT professionals and other experts working closely with the World Wide Web data. You may have also heard of a reverse proxy server, which takes care of several essential tasks, handling incoming client requests and forwarding them to backend servers.

Unlike forward proxies, which often require a client-side application and configuration, reverse proxy is usually invisible and manages incoming traffic automatically. Businesses primarily use them for load balancing, security, and traffic optimization. In this article, I'll shed some light on a reverse proxy place in a modern internet structure, its benefits, and its exact use cases.

What Is a Reverse Proxy?

A reverse proxy server, or reverse proxy, is a type of proxy that accepts client requests and sends them to backend servers. Without reverse proxies, a client (usually a web browser used for surfing online) sends data requests (for example, to display a video) to the origin server that hosts websites. The origin server interprets a client request and responds with relevant data.

are a type of forward proxy because it stands in front of the client and forwards its requests to servers.

Confusing reverse proxies with forward is easy because both types manage online traffic. However, a reverse proxy manages incoming traffic, while forward proxies control outgoing traffic. Similar in design, these two proxy types serve entirely different goals.

Reverse proxy servers protect backend servers from direct access, overloading, and cyberattacks like DDoS. They can be used to host a firewall, encrypt data, and authenticate SSL certificates. They also simplify backend server management because a single reverse proxy server can redistribute traffic through the whole network depending on its configuration.

This is a straightforward communication via a reverse proxy scheme. If there are additional additional configurations, like traffic encryption or SSL authentication, then numerous additional steps appear in between.

Why Use a Reverse Proxy?

Reverse proxies are essential for efficient World Wide Web maintenance, but in this article let's focus on consumer benefits. Businesses that compete in the digital marketplace may quickly require reverse proxies if their website attracts increasingly more traffic. Simultaneously, enterprises that handle personally identifiable information (PII) need to adhere to data security regulations, which is another reverse proxy benefit.

Load Balancing

Load balancing is one of the most straightforward and common reverse proxy use cases. Imagine your website attracts a hundred thousand visitors daily. Most are visitors from the US who browse your website after work. So, during the day, it handles low-to-average traffic, but it increases greatly after working hours.

Suppose the origin server is not powerful enough to withstand hundreds of users simultaneously. In that case, it will overload, and the website will go down, which is particularly damaging for e-commerce platforms.

since the pandemic. With the current geopolitical tensions, cybercrime is expected to keep growing, so the cybersecurity reverse proxy benefits are as important as ever.

Firstly, reverse proxies obfuscate the backend server IP address. An IP address is like a virtual home address, so exposing your server location on the internet poses security risks. Hackers exploit server IPs to target them with distributed denial-of-service (DDoS) cyberattacks that bombard the server with fake requests. Once the request number reaches a critical mass, it overloads the server to bring the website down.

Reverse proxies can also restrict access to specific server resources. This way, they hide confidential data from unauthorized access. Because reverse proxies work with incoming data, they are an excellent place to host a firewall that will inspect incoming traffic for malicious elements before they infect the backend server. Lastly, reverse proxies can handle SSL encryption, which is essential for data security and online privacy protection.

Geolocation Services

The geolocation optimization uses load balancing and content caching but on a global scale. If you host your website on the US servers but attract thousands of visitors from India, then they may experience slow connection speed due to the huge distance between the servers. You can place a reverse proxy closer to the client's location, which will store cached data and process clients' requests faster.

Common Use Cases for Reverse Proxies

By now, the technological and theoretical aspects of reverse proxies should be apparent. Let's take a look at the most common reverse proxy use cases.

Web Hosting and Application Delivery

Website and application hosting services widely deploy reverse proxies to provide the best services possible. The load balancing and caching ensure that the website or an application loads quickly. Keep in mind that and extract it to a selected location.

server {

    listen 80;

    server_name your_domain.com;

    location / {

        proxy_pass http://backend_server:8080;

        proxy_set_header Host $host;

        proxy_set_header X-Real-IP $remote_addr;

        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;  

    }

}

1. In the example, the "your_domain.com" part must be filled with your reverse proxy IP address or domain name.


2. The "http://backend_server:8080" must be replaced with your backend server URL.
   


3. Press Windows button and type cmd, and press Enter to open the command prompt.


4. 
   Type nginx.exe -s start to launch Nginx with the current configuration.

Conclusion

Although unseen to clients, reverse proxy servers are essential to businesses that rely on online data. CND networks and massive e-commerce platforms use them to redistribute massive user traffic without overloading servers. Simultaneously, SSL encryption, IP address obfuscation, and traffic analysis protect backend servers from external threats.