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"proxy" is a term used to describe a server "proxy" is a reference to the notion of a proxy frequently referred to as a proxy server is software that functions in the role of intermediary between a server and a client on the internet. Without the use of a proxy, users could send a request to the server directly and the server would then serve the requested resource directly to the user. Although this method is easy to understand and implement, adding proxies provides advantages such as more performance as well as security and privacy and so on. As a pass-through layer, the proxy functions as a guardian for the internet between clients and servers.

It is generally accepted that the system of server hardware coupled with the software used to install proxy is usually referred to as proxy servers. This article will concentrate on proxy servers that are usually described as software but specifically in relation to web servers. This article will give a synopsis of the two primary types of proxies: that is forward proxy and reverse proxy. forward proxy and reverse proxy. reverse proxy. Each type comes with its own usage scenario, which is often misunderstood due to the overlapping terminology.

This article will provide you with an idea of the nature of proxies, as well as their subtypes are and the ways that they can prove useful in a variety of configurations. If you read this article, you'll learn to identify situations where the use of proxy servers is advantageous, and determine the most suitable option between reverse proxy and forward proxy for a particular scenario.

Understanding Forward Proxies

The forward proxy also referred to in the context of an open proxy is the representative of the client trying to send requests via the internet to a source server. In this situation, any attempt to send requests from the user's side will be handled by forward proxy. This forward proxy in the place of the client, will examine the request. It will then determine whether the client is permitted to send requests via this particular forward proxy. Then, it'll decide whether to reject the request or forward it to the server that originated the request. The client is unable to connect directly to the internet. It can only reach what forward proxy allows for it to reach.

The most popular reason to use forward proxies is to increase security or privacy when surfing the internet. A forward proxy is able to access the internet rather than the client. In this process, it uses an IP address that is different from the original IP address of the client.

Based on the way it's set up depending on how it is configured forward proxy could offer a range of functions and allow users to:

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  Beware of ads-trackers.
  
  
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  Circumvent surveillance.
  
  
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  You will be able to identify any restrictions based upon your geographical location.
  
  

Forward proxies are also utilized for security systems that are centralized and have access based on permissions, like in a workplace. If all internet traffic flows through a common forward proxy layer, an administrator could limit access for only a select group of internet users that is then filtered through the common firewall. Instead of creating security firewalls on the layer that is used by clients which could be used by a number of computers that have different kinds of environments, you can have a firewall at the forward proxy layer.

It is important to note that forward proxies must be manually configured to be utilized, whereas reverse proxies are able to remain unnoticed by clients. Based on whether your IP address the user is relayed to an server that originated it through the forward proxy, privacy and anonymity may be granted or denied.

There are many alternatives to look into for forward proxy services.

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  Apache A well-known, open-source web server that has forward proxy capability.
  
  
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  Nginx: Another widely used open-source webserver that includes forward proxy functions.
  
  
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  Squid: A free forward proxy which uses an HTTP protocol. It's not part of the entire web server. Learn more about how to set up Squid proxy to allow private connections to Ubuntu 20.04.
  
  
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  Dante Forward proxy that utilizes the SOCKS protocol rather than HTTP which allows it to be more suitable for applications like peer-to-peer traffic. You may also want to check out how to set up Dante proxy to permit private connections on Ubuntu 20.04
  
  

Understanding Reverse Proxies

A reverse proxy acts as an agent for a web server which handles requests from customers for its behalf. This server can represent a single, or multiple servers. It could also be an application server like Gunicorn. In either scenario it is possible to send a request via the internet in general. Typically, the request is sent directly to the server hosting the information the client is in need of. Instead, a reverse proxy acts as an intermediary, and separates Web servers from any direct interactions with the public internet.

From the viewpoint of the client an individual's viewpoint the procedure of using reverse proxy isn't any different than working with the server by itself. It's the exact same thing, however the client is unable to discern the difference. The client requests the resource, and is then provided with it, without any additional configuration needed from the user.

Reverse proxies provide features like:

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  The server for the web is secure centrally.
  
  
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  The direction of traffic coming in is by rules you have set.
  
  
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  A new feature for caching has been added.
  
  

While central security is an advantage of both forward and reverse proxy servers, reverse proxies offer this feature to only the server layer and it is not available to the client layer. instead of maintaining firewalls on the server level that may contain multiple servers with various configurations, the bulk of security for firewalls is concentrated on the reverse proxy layer. Furthermore, taking the burden of working with firewalls and connecting to requests from clients away from web servers allows firewalls to concentrate on providing the needs of their customers.

When there is a multitude of servers hosted by a reverse proxy, it is accountable for the way requests are routed through which server. Multiple web servers could be offering the same service, offering various kinds of resources or a combination of both. These servers may use an HTTP protocol to serve as an ordinary web server however they can also use protocols for application servers like FastCGI. You can also configure reverse proxy servers to redirect users to specific servers based on the resource requested or to abide by specific rules regarding traffic load.

Reverse proxies can also benefit by their positioning prior to web servers by offering caching capabilities. Large static assets can be configured by caching rules to ensure that web servers are not hit on every request. There are solutions allowing you to serve directly static files without having to connect with the server on any manner. In addition, the reverse proxy can manage compressing these assets.

The renowned Nginx web server can also function as a reliable reverse proxy solution. Even though Apache has a reverse proxy service it is not the only one. Apache web server comes outfitted with reverse proxy functionality which is a option that is accessible to Apache but Nginx was originally designed to specifically focus on reverse proxy features.

The distinction between Forward Proxy and Reverse Proxy Use Cases

Since "forward" as well as "reverse" are associated with the notion of directionality as well as misleading distinctions between "incoming" as well as "outgoing" traffic The labels can be confusing since both types of proxy servers handle requests and responses. A better approach to differentiate between forward and reverse proxy is to analyze the requirements of the application that you're creating.

Reverse proxy can be useful when you are developing a solution to deliver web-based applications to the internet. They serve as your web servers when you connect to the internet.

Forward proxy is useful when used before customers for your personal use or in a professional setting. They act as your client's proxy when you interact with the internet.

The ability to differentiate by the use of case instead of focusing on naming conventions that are commonplace can help you avoid confusion.

Conclusion

This article will explain what a proxy is and provides two types: the forward proxy and reverse proxy. Practical examples of its use and a brief overview of useful characteristics were used to differentiate forward proxies from reverse proxies. If you're keen to learn more about proxy servers, look over our guide on how you can configure Nginx as a reverse proxy by using Apache on an Ubuntu 20.04 server.

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