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An proxy also referred to a proxy server is software that acts as an intermediary between a client and a server on the internet. Without the need for a proxy, a user can send a request for something directly through a server, and the server would then deliver the resource directly to the user. Though this approach is simple to comprehend and implement the addition of proxies can provide advantages in terms of enhanced performance, privacy, security, and much more. Alongside adding a layer of security proxy servers also act as a security safeguard for the internet between servers and clients.




The general consensus is that the set of server hardware along with installed proxy software is also frequently known as proxy servers. This article will concentrate on the proxies that are typically categorized as software, and in the case of web servers. We will provide a brief overview of the two primary types, namely which are a forward proxy and a reverse proxy. Each has its own specific usage and can be confusing because of a similar naming convention.




This article will give you an understanding of nature of proxies and what their subtypes are and how they work in the common configurations. By reading this article, you'll discover how to identify the scenarios in which it is beneficial to utilize a proxy and make the right choice between reverse proxy and forward proxy for any scenario.



Understanding Forward Proxies



In another way a forward proxy, also called open proxy. In other words, an open proxy acts as a representative of a client who wants to make an internet-based request to an origin server. In this situation, any request from the client is instead routed straight to the forward proxy. Forward proxy acting on place of the client will examine the request. The first step is to decide if the client has the right to accept requests from this specific forward proxy. Then, it decides if it wants to reject an request and send it back to the server that originally received it. The client is not able to have direct access to the internet. It is only able to access the internet that the forward proxy grants it access to.




The most popular reason to use forward proxies is to improve privacy or security on the internet. Forward proxy allows you to access the internet place of a client, and as such it could use an alternative IP address to the IP address originally utilized by the client.




Depending on how they've been configured in the past forward proxy servers may offer a wide range of options. They allow you to:




Do not be a victim of ad tracking.


Circumvent surveillance.


You will be able to identify any restrictions based upon your geographic area.




Forward proxies may also be employed in systems that offer central security and permission-based access, like in a workplace. When all internet traffic passes through an open forward proxy,, administrators are able to restrict access to those clients who are and filter it through a standard firewall. Instead of having firewalls for the client layer which could include a variety of devices that are different in user and environment the firewall can be placed into the forward proxy layer.




Be aware that forward proxy settings need to be configured manually in order to be used, while reverse proxy settings are disregarded by clients. Depending on the type of IP address of the client is sent to the origin server via the forward proxy, privacy and anonymity could be granted or not.




There are several alternatives to think about for forward proxies




Apache: A popular open-source webserver that includes forward proxy features.


Nginx: Another renowned open-source webserver that has forward proxy features.


Squid: A no-cost forward proxy that makes use of an HTTP protocol. It doesn't provide a complete web server solution. Take a look at our step-bystep guide to install Squid proxy to allow private connections on Ubuntu 20.04.


Dante forward proxy that runs the SOCKS protocol instead of HTTP this makes it more suitable for situations like peer-topeer traffic. You can also examine the steps to install the Dante proxy for private connections in Ubuntu 20.04



Understanding Reverse Proxies



A reverse proxy functions as a proxy for web servers that handle any requests that come in from clients on its behalf. The web server could comprise one server or several servers. It could also be a server for applications like Gunicorn. In any of these scenarios, an application request is made from a user via the internet generally. In the majority of cases, the request will be sent directly to the web server with the data the user is seeking. A reverse proxy works as an intermediary, protecting Web servers from direct contact with the web's public.




From a consumer's point of viewpoint, or from a user's perspective, working via a reverse proxy identical to working with an internet server direct. It's exactly the same thing, however the user is unable to see the distinction. The client requests a resource and then receives it, without any additional configuration needed on the part of the client.




Reverse proxies provide features such as:




Secured centrally for Web Server Layer.


Controlling traffic coming inbound according to rules that you can set up.


The caching function has been added to the app.




While central security is an advantage of both reverse and forward proxy servers, reverse proxies offer this feature only to the server layer, only the layer that clients use. Instead of having firewalls running for servers on the internet,, which could contain multiple servers and various configurations, the majority of firewall security can be targeted at reverse proxy layers. Furthermore, the elimination of the responsibility to interact with a firewall and also interacting with clients' requests outside of web servers permits them to concentrate on providing the needs of their customers.




In the event that there's multiple servers hosted using a reverse-proxy, the reverse proxy will also be responsible for directing what requests go to the server. There could be multiple web servers providing similar content providing different kinds of content or a mixture of both. These servers may be running the HTTP protocol similar to an ordinary web server however they could also include additional protocols for application servers like FastCGI. It is also possible to set up a reverse proxy to redirect clients to specific servers based upon the requested resource or follow specific rules regarding traffic load.




Reverse proxies also can make use of their position ahead of web servers, by providing the ability to cache. Massive static resources can be configured with caching rules to avoid the web server from being hit with each request. There are solutions that permit you to serve static assets immediately without needing to connect to the web server once. In addition reverse proxy solutions can handle compression of these assets.




The well-known Nginx web server can also function as a well-known reverse proxy solution. While Apache can also be a reverse proxy service however, it is not a reverse proxy solution. Apache web server is also able to function with a reverse proxy feature as an additional attribute of Apache while Nginx was designed initially for and focuses on its reverse proxy feature.



Distinguishing Forward Proxy from Reverse Proxy Use Examples



Since "forward" and "reverse" are associated with directionality, as well as false comparisons with "incoming" and "outgoing" traffic the labels could be confusing as both types of proxies are able to handle requests and responses. The best way to distinguish between reverse and forward proxy is to look at the requirements of the program that you are building.




A reverse proxy could be helpful when building a web-based applications on the internet. They serve as your web servers when you interact on the web.




Forward proxy can be useful when placed in front of clients for personal use, or in an office environment. They represent your customers whenever you use the internet.




The use case-based differentiation instead of focusing on the standard naming conventions could help in eliminating confusion.



Conclusion



The article clarified the meaning of a proxy, which includes two kinds that are forward and reverse proxy. Practical applications and a review of the beneficial characteristics were employed to identify between forward and reverse proxy. If you're interested in knowing more about the process of implementing proxies you can check out our tutorial on how to set up Nginx as a web server and reverse proxy using Apache on an Ubuntu 20.04 server.



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