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It is an proxy commonly referred to as proxy server. It is a software that acts as an intermediary between the client and server on the internet. Without the use of proxy, a user would make a request a resource directly to the server and it would then serve the requested resource directly to the user. It's not hard to comprehend and implement. proxy feature can provide benefits such as greater performance and privacy, security and many more. As a further layer of pass-through, proxies act as a gatekeeper on the internet between servers and clients.

The general set of server hardware along with the software for proxy installation is usually referred to in the context of proxy servers. This article will concentrate on proxies commonly referred to as software, and also in connection with web server. The article will provide an explanation of the two types of proxies, which comprise forward proxy and reverse proxy. forward proxy and reverse proxy. reverse proxy. Each has its own usage scenario, which is often misunderstood due to the similar name convention.

This article will give you an overview of what proxies and their subtypes are, as well as how they work in the typical setups. Through this guide, you'll be able to understand how to identify the circumstances in which using proxies can be beneficial, and select the correct solution in between reverse and forward proxy, for each situation.

Understanding Forward Proxies

In the same way forward proxy also called an open proxy serves as the representative of a client who wants to send requests over online to the original server. In this case any attempts to send requests made by the client will instead be forwarded via the forward proxy. In this scenario the forward proxy that is in the place of the client will look into the request. First, it must check if the client is authorized to receive requests from this particular forward proxy. The client will either decline the request or forward it to its original server. The client does not have an internet connection directly; it can only connect to the internet that the forward proxy allows it access to.

The most common reason to use forward proxies is to gain greater privacy or security online. A forward proxy uses the internet in place of a client and in that process it could use an alternative IP address that is different from the client's original IP address.

Based on the way it's configured, and based on the way it is configured, forward proxy may offer a range of features and also the ability to:

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  Beware of ad-tracker.
  
  
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  Circumvent surveillance.
  
  
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  Find restrictions based on your geographical location.
  
  

Forward proxies are also used in systems that offer central security and access that is based on permissions such as in the workplace. If all traffic on the internet flows through an open forward proxy layer, administrators can grant access only to specific users to the internet through the common firewall. Instead of having firewalls in place on the client layer that could contain various devices with different settings, users, and settings, a firewall may be installed at this forward proxy layer.

It is important to note that forward proxy servers have to be manually set up to use to be used, while reverse proxies are able to be disregarded by clients. Based on whether or not the IP address of the user is transferred to the server of origin via the forward proxy, privacy and anonymity can be provided or rendered clear.

There are a myriad of options to consider options for forward proxy options

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  Apache: A popular open-source web server that offers forward proxy capabilities.
  
  
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  Nginx: Another well-known open source webserver that includes forward proxy capability.
  
  
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  Squid is a free forward proxy that uses the HTTP protocol. This doesn't offer the entire web server. Check out our article on the best method of creating Squid proxy to permit private connections within Ubuntu 20.04.
  
  
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  Dante Forward proxy that makes use of the SOCKS protocol instead of HTTP, which makes it better to handle situations like peer-to-peer communication. You might also want to know how to setup a Dante proxy for private connections using Ubuntu 20.04
  
  

Understanding Reverse Proxies

A reverse proxy acts to act as an agent of a web server, handling the incoming requests of customers on behalf. The web server may be comprised of one server or even multiple servers. It could also serve in the role of an application server such as Gunicorn. In either scenario a request could come from a customer via the web in general. In most cases, the request is sent directly to the website server with the resources that the customer needs. Instead, a reverse proxy functions as an intermediary that isolates your website server from any interactions with the open internet.

From a customer's point of view, the experience when using reverse proxy is the same as communicating directly with your webserver. It's basically identical, and the user is unable to discern the difference. The client requests a resource, and is then able to receive it with no additional configuration needed by the client.

Reverse proxies provide functions like:

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  Centralized security to web server.
  
  
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  The sending of traffic in accordance with rules you set up.
  
  
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  New functionality added for caching.
  
  

While central security is a benefit for both reverse and forward proxy systems, reverse proxy offers this service to only the server layer and not to the layer that clients use. In lieu of the maintenance of firewalls on the web server layer which could contain multiple servers that have different configurations, the bulk of firewall security could be focused to the reverse proxy layer. Furthermore, getting rid of the hassle of connecting to firewalls as well as communicating with clients' requests away from web servers allows them to focus solely on addressing the needs of their clients.

In the case of multiple servers running in a reverse proxy, the reverse proxy is also accountable for controlling which requests go on which server. There could be multiple web servers that provide the same service, serving different types of resources or a mixture of both. They can use the HTTP protocol like a traditional web server, however they could also be outfitted with protocols for application servers such as FastCGI. A reverse proxy can be used to direct clients to specific servers based on the kind of resource they are searching for, or comply with specific rules regarding traffic volume.

Reverse proxies may benefit from their position on top of web servers, by providing the capability to store data. Large static files can be configured using caching policies to stop hitting web servers with each request. Certain solutions allow you to deliver static content directly, without having to connect to the server. Additionally reverse proxy has the capability of compressing these files.

The well-known Nginx web server is a powerful reverse proxy solution. Although it is true that the Apache web server is also equipped with an reverse proxy, however it's an additional attribute of Apache however Nginx was originally designed for and focuses on reverse proxy functions.

Distinguishing Forward Proxy From Proxy Use. and Reverse Proxy Utilization

Because "forward" along with "reverse" are associated with directionality, they can be misleading when comparing "incoming" as well as "outgoing" traffic These labels can be confusing because both kinds of proxies are able to handle requests and also respond. Instead, a better way to distinguish between reverse or forward proxies is to look at the requirements of the application that you are developing.

Reverse proxy is an essential aspect to consider when developing a solution which can offer web-based services via 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 environment. They are your customers when you are on the internet.

A case-based approach to distinction instead of focusing only on naming conventions that are similar can prevent confusion.

Conclusion

The article described what a proxy is and the two kinds of them: reverse and forward proxy. Application scenarios that can be used in practical situations and a review of the most useful features were used to distinguish between forward and reverse proxies. If you're looking to know more about the benefits of proxies, then you can check out our guide on how to set up Nginx as an reverse proxy and internet server in Apache in an Ubuntu 20.04 server.

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