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It is a proxy or proxy server. It is software that acts in the role of a intermediary between a client and server over the internet. Without the use of a proxy, clients would be able to make a request for every resource straight to the server and then the server would serve the resource directly back at the request of the customer. Although this method is simple to comprehend and implement the addition of proxies can provide advantages in the form of improved performance and privacy, security and many more. As a layer of pass-through, a proxy serves as an extra layer of security on the internet between clients and servers.

The consensus is this: the mix of servers hardware and software used to set up proxy installations is commonly referred to as proxy servers. This article will be focusing on proxy servers that are typically considered to be software, and also within the context of web servers. The article will provide a detailed discussion of the two primary types, namely which are a forward proxy and reverse proxy. reverse proxy. They each have their own usage scenario, which is often misunderstood because of the similar terms.

This article will provide you with some knowledge about what proxies are and what their subtypes are, and how they work in common configurations. After reading this article, it will be able determine the situations that you can gain by a proxy, and decide which is the best choice between reverse and forward proxy options for every circumstance.

Understanding Forward Proxies

The forward proxy also known in the form of the open proxy serves as the representative of a client who wishes to make a request through the internet to an source server. In this instance, the whole attempt to send requests made by the user is instead transferred to the forward proxy. The forward proxy, acting on behalf of the client will review the request. The first step is to determine whether the client is able to accept requests via this particular forward proxy. Then, it decides to deny a request or forward it to its original server. The client is not capable of having an internet connection directly. It is only able to access what forward proxy permits for it to be connected to.

A common use of forward proxies is to gain greater privacy or security when surfing the web. A forward proxy is able to access the internet in instead of a client and as such it could make use of an IP address that is different from that of the client's initial IP address.

Based on the way it has been set up the forward proxy can provide a variety of functions depending on the configuration that lets you:

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  Beware of ads that track you.
  
  
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  Circumvent surveillance.
  
  
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  Find restrictions that are based on the location you are in.
  
  

Forward proxies can also be used to secure systems that are centralized and permission-based access such as at work. Every internet connection can go through an open forward proxy. an administrator can grant only a few clients connection to internet through a common firewall. Instead of creating firewalls at the layer of clients, that could include a variety of machines that have different settings and users. A firewall could be set up in the front proxy layer.

It is important to remember that forward proxy servers must be set up manually for be used, however reverse proxies remain unnoticed by clients. Depending on the type of IP address of the user is transferred to the server from which it originated by the forward proxy privacy and anonymity may be granted, or left unnoticed.

There are a myriad of options to consider forward proxy options

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  Apache The Apache is a popular open-source web server that provides forward proxy functions.
  
  
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  Nginx is a different well-known open-source webserver that comes with forward proxy features.
  
  
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  Squid is an open-source forward proxy which utilizes an HTTP protocol. It isn't an entire Web server software. Check out our instructions on setting up Squid proxy to connect privately in Ubuntu 20.04.
  
  
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  Dante Forward Proxy that utilizes the SOCKS protocol instead of HTTP which makes it more suitable for situations such as peer-to-peer connections. You may also want to examine how you can setup a Dante proxy to connect privately in Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy is the web server that handles client requests instead. The web server can serve as a one server or as a set of servers. Additionally, it can function in the role of an application server, such as Gunicorn. In either of these scenarios the request will come from a customer via the internet. Typically, the request is directed directly to the server that is the one that has the resources the user is requesting. In contrast, a reverse proxy works as an intermediary, separating it from direct contact with the open internet.

From the perspective of the client, interfacing with reverse proxy is not different from interacting with your website server direct. It's essentially the same, and the user is unable to tell the distinction. The client makes a request for a resource that is then followed by receiving it with no further configuration by the user.

Reverse proxies can provide features such as:

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  Centralized security for the web server layer.
  
  
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  Sending traffic to be directed according to rules that you determine.
  
  
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  Additional functionality for caching.
  
  

Although centralized security is a benefit for both forward and reverse proxy servers, reverse proxy services provide this benefit to those who use the server layer, but not to the layer that clients use. Instead of the maintenance of firewalls at the layer of web servers which could contain multiple servers with various configurations, the bulk of the firewall security can be concentrated at the reverse proxy layer. In addition eliminating the hassle of dealing with firewalls and interfacing with clients who request information from web servers allows them to focus on serving the resources.

If multiple servers are running behind a reverse proxy, the reverse proxy also handles how requests are routed to which server. There may be several web servers that provide the identical service, and each offering different kinds of resources, or a combination of the two. They may utilize the HTTP protocol to function as a standard web server, but they could also incorporate applications server protocols like FastCGI. It is possible to set up reverse proxy that routes users to specific servers based upon the requested resource or to observe certain guidelines regarding traffic volume.

Reverse proxies can also benefit by their position over web servers, as they provide the ability to cache data. Large static assets can be set up with caching rules in order to avoid hitting web servers with each request, with certain solutions providing the option to deliver static files directly without connecting to the web server once. In addition, the reverse proxy is able to handle compression of these files.

The well-known Nginx website server also a very popular reverse proxy solution. Although Apache can also be a reverse proxy option, it is not a reverse proxy solution. Apache web server does have reverse proxy capabilities as an added option for Apache and Nginx was originally designed for and was designed with a focus on reverse proxy capabilities.

Differentiating Forward Proxy and Reverse Proxy Use Differentiating Forward Proxy and Reverse Proxy Use

Since "forward" and "reverse" come with connotations of directionality and false comparisons to "incoming" as well as "outgoing" traffic These labels are prone to confusion since both kinds of proxy handle responses and requests. In addition, the most effective method of separating between reverse and forward proxy is to look at the requirements of the app you're working on.

Reverse proxy is an essential element when you're creating a solution for serving web-based applications via the internet. They act as your web server in any interaction with the internet.

A forward proxy is beneficial for use in front of customers for your personal use or even in a workplace. They serve as the proxy for your client for any interaction on the internet.

Utilizing use cases to differentiate rather than focusing solely on common naming conventions can make it easier to avoid confusion.

Conclusion

The article explained the meaning of a proxy, with the two primary types being the forward proxy and reverse proxy. Practical scenarios to use them and a discussion of the most beneficial features were used to distinguish forward proxies and reverse proxies. If you're keen to learn more about the possibilities of proxies then you can check out our tutorial on how to install Nginx as an reverse proxy and an internet server with Apache using an Ubuntu 20.04 Server.

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