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It is an proxy frequently known as proxy server. It is a software that acts as a middleman between the user and server over the internet. Without a proxy, a user could send a request for a resource directly to a server, and it would deliver the requested resource directly to the user. This is not difficult to comprehend and implement. addition of proxies can bring advantages like improved performance as well as privacy, security and so on. As an additional layer of pass-through, proxies serve as a security barrier on the internet between servers and clients.

The general set of hardware used by servers and the software used to install proxy is usually referred to as proxy servers. This article will focus on proxies commonly referred to as software, and also in relation to web servers. This article will give an explanation of the two major kinds of proxies. They comprise forward and reverse. forward proxy and reverse proxy. reverse proxy. Each has a distinct use scenario, which is often misunderstood due to the similar namesake convention.

This article will provide you with an idea of the nature of proxies and subtypes, and how they function in normal configurations. In this article, you'll be able to understand what situations in which the use of proxies is beneficial and how to choose the best option between forward and reverse proxy depending on the situation.

Understanding Forward Proxies

In other words a forward proxy, also called an open proxy serves as the representative of a client who wants to send requests over on the web to an origin server. In this scenario, all attempts to send requests by the client are instead transferred to the forward proxy. In this case, the forward proxy in the place in the place of the customer will examine the request. It is the first thing to determine if the client is authorized to receive requests from this particular forward proxy. The client will either decline an request and forward it to the original server. The client is not able to have direct connection to the internet; it can only access what the forward proxy permits it to connect to.

The most common reason to utilize forward proxy servers is to increase privacy or security online. Forward proxy makes use of the internet in place of a client, and in that process it can use an alternate IP address that is different from the initial IP address of the client.

Based on the way it's configured, and based on the way it is configured forward proxy could provide a range of features and also the capability to:

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  Do not be a victim of ad tracking.
  
  
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  Circumvent surveillance.
  
  
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  Find restrictions based on your geographic location.
  
  

Forward proxies can also be used in systems that offer centralized security and access based on permissions like in the workplace. If all internet traffic flows through an open forward proxy layer an administrator could grant access only to a few users to the internet filtered through the common firewall. Instead of having firewalls in place on the client layer that could contain multiple devices with various settings, users and environments, a firewall may be installed at this forward proxy layer.

Be aware that forward proxy servers need to be manually set up to use to be utilized, whereas reverse proxies are able to be ignored by clients. Based on the fact that the IP address of the client is transferred to the server of origin through the forward proxy privacy and anonymity could get granted, or even made transparent.

There are many possibilities to consider options for forward proxy options

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  Apache The Apache is a popular open-source webserver that provides forward proxy functionality.
  
  
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  Nginx: Another well-known open source webserver that has forward proxy capabilities.
  
  
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  Squid: A free forward proxy based on the HTTP protocol. Squid doesn't include the full web server. You can check out our guide on the best way to create Squid proxy that allows private connections in Ubuntu 20.04.
  
  
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  Dante Forward proxy that makes use of the SOCKS protocol instead of HTTP, which makes it better suited for scenarios such as peer-to-peer connections. It's also a good idea to learn how to setup the Dante proxy for private connections using Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy serves to act as an agent of web servers, which handles any requests that come in from customers on its behalf. The web server could comprise a single server, or a number of servers. It could also be used in the role of an application server, like Gunicorn. In either scenario a request could be made by a client via the internet at large. Normally, this request will be sent directly to the website server that has the resources the client needs. A reverse proxy functions as an intermediary in order to protect your web server from interactions with the internet's public.

From a client's perspective the experience of using reverse proxy is not different from communicating directly with your webserver. It's basically the same and the user cannot tell the distinction. Client requests resources and receives it without any additional configuration required by the client.

Reverse proxy services offer options like:

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  Security centralized on webservers.
  
  
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  The sending of traffic according to rules you can make.
  
  
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  New functionality added for caching.
  
  

While centralized security is an advantage of both reverse and forward proxy, the reverse one offers this service only to the server layer, and not to the layer that clients use. Instead of focusing on the maintenance of firewalls on the web server layer that could include multiple servers that have different configurations, the majority of firewall security may be centered in the reverse proxy layer. Additionally, removing the responsibility of interacting with firewalls and communicating with clients' requests away from web servers allows them to concentrate on meeting the requirements of their customers.

If there are multiple servers running behind a reverse proxy, the reverse proxy is also accountable for deciding which requests go to which server. There may be several web servers offering the same service, but serving different types of resources or a combination of both. They can utilize the HTTP protocol like a traditional web server, but can also be equipped with protocols for application servers like FastCGI. A reverse proxy can be used to direct clients to specific servers depending on the kind of resource they are looking for, or to adhere to specific rules for traffic volume.

Reverse proxies benefit from their placement in front of web servers through the possibility of storing data. The large static file can also be set up using caching policies to stop hitting web servers with each request. Some solutions providing the option to serve static content directly without ever touching the server. Additionally reverse proxy has the capability of compressing these files.

The popular Nginx web server is a powerful reverse proxy service. While it's factual that Apache web server also comes with an reverse proxy feature, however it's an additional attribute of Apache but Nginx was initially designed for and focuses on reverse proxy functions.

Differentiating Forward Proxy from Proxy Use. and Reverse Proxy Use

Because "forward" in addition to "reverse" can be interpreted as directionality, they can be misleading when comparing "incoming" and "outgoing" traffic. The labels can be confusing because both types of proxies are capable of handling requests and also respond. The best way to distinguish between reverse or forward proxies is to look at the requirements of the app that you're creating.

Reverse proxy is a crucial feature when designing a solution which can offer web-based services over the internet. They act as your servers whenever you connect to the internet.

A forward proxy is useful when it is placed in front of users for personal usage, or even in a business setting. They represent your clients whenever you interact with the internet.

The use case-based differentiation instead of focusing solely on similar naming conventions will help you avoid confusion.

Conclusion

The article clarified what a proxy was and the two kinds of them: both reverse and forward proxy. Practical application scenarios and a review of the most useful features were used to differentiate between reverse and forward proxies. If you're keen to learn more about the possibilities of proxies, you should read our guide on how to set up Nginx as an internet server and reverse proxy for Apache in Ubuntu 20.04. Ubuntu 20.04 server.

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