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It's an proxy which is also known as a proxy server. It is software that acts as an intermediary between client and server over the internet. With no proxy in place, a customer could make a request for an entity directly through a server, and the server will provide direct access to that resource for the user. While this approach is straightforward to comprehend and implement using proxy services, it may provide advantages in terms of better performance and privacy, security and much more. As an additional pass-through layer proxy is a security guardian for the internet between servers and clients.

It is generally accepted that the entire set of server hardware along with installed proxy software is also frequently referred to as proxy servers. This article will focus on proxy servers that are typically described as software, and within the context of web servers. This article will give an in-depth description of the two primary types: a forward proxy and reverse proxy. reverse proxy. Each kind has its own specific usage instance, but they are often confused due to the same name-based convention.

This article will give you information on what proxies are and what their subtypes are and how they operate in the common configurations. In this article, you'll be able to identify the circumstances in which you may benefit from a proxy, and select the right solution between reverse proxy and forward proxy in any circumstance.

Understanding Forward Proxies

The forward proxy also known in the form of an open proxy is a representative for a client who wants to transmit a request over the internet to a source server. In this case, it's the scenario that all requests made by the user would prefer to be sent through this forward proxy. A forward proxy acting in the place of the client will review the request. First, it must decide if the client is allowed to make requests through this specific forward proxy. Then it can either reject the request or forward it to the server originally. The client does not directly connect to the Internet. It can only reach what forward proxy permits it to connect to.

One of the most frequent applications of forward proxies is to gain increased privacy or anonymity on the internet. Forward proxy utilizes the internet as the client. In this way, it could make use of an alternative IP address to the client's original IP address.

Depending on how it has been set up depending on the configuration forward proxy can give you a variety of options and allow you to:

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  Do not click on ads that track you.
  
  
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  Circumvent surveillance.
  
  
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  You can identify restrictions based upon your geographical location.
  
  

Forward proxies are also utilized in systems that provide centralized security and access via authorizations, for instance in a workplace. When all internet traffic passes through a forward proxy, a manager could permit only a few clients online access that is blocked by a firewall that is common to all. Instead of putting firewalls for the client layer that can include multiple machines with different configurations and users the firewall could be put on the layer which forwards proxy traffic.

Note that forward proxies require manual setup to be used, while reverse proxies might not be detected to the user. Depending on the kind of IP address of a customer is relayed to the origin server via the forward proxy privacy and anonymity may be granted, or left unnoticed.

There are many options to look into when it comes to forward proxy choices

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  Apache An open-source, well-known web server with forward proxy capabilities.
  
  
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  Nginx is another popular open-source web server with forward proxy features.
  
  
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  Squid is an open source forward proxy which uses the HTTP protocol. Squid doesn't provide the complete Web server. You can refer to our step-by-step guide to set up Squid proxy for private connections on Ubuntu 20.04.
  
  
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  Dante Forward Proxy that uses the SOCKS protocol instead HTTP which allows it to be more appropriate for applications such as peer-to-peer traffic. You could also find out how to install a Dante proxy for private connections on Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy functions as a proxy for a web server, handling incoming requests from clients for. This web server may comprise a singular server, or multiple servers. Furthermore, it could serve for application servers, such as Gunicorn. In both cases, the request will come in from a client through the internet at large. In most cases the request will be sent directly to the web server with the information the client requires of. A reverse proxy acts as an intermediary and separates it from direct interactions with the open internet.

From the viewpoint of the client, interacting with reverse proxy is not any different from interacting with the web server directly. It's exactly the same, and the client cannot discern the difference. The client requests the resource, and then gets it, with no extra configuration needed from the client.

Reverse proxy providers provide features like:

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  The server for the web is secure centrally.
  
  
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  The sending of traffic according to the rules you decide to determine.
  
  
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  Additional features to cache data.
  
  

While central security is a benefit of both forward and reverse proxy solutions, reverse proxies give this benefit to Web server layers, but not to the layer of clients. Instead of implementing firewalls on the layer of web servers, which could contain multiple servers that have different configurations, the bulk of firewall security lies on the layer of reverse proxy. Furthermore eliminating the burden of interacting with firewalls and communicating with requests from clients who aren't connected to web servers lets them focus solely on serving resources.

In the event of multiple servers running in a reverse proxy the reverse proxy is also responsible to control which requests are routed through which server. Multiple web servers could be serving the same content, supplying different kinds of resources, or a mixture of the two. They can utilize the HTTP protocol in the same way as an ordinary web server but they could also incorporate application server protocols like FastCGI. It is possible to create reverse proxy servers that redirects clients to particular servers in accordance with the requested resource, or to adhere to specific guidelines for traffic load.

Reverse proxies also gain by their position before web servers, by providing caching functions. The large static file can be configured using caching rules to prevent having to call web servers on every request, with some solutions allowing users to serve static files directly without contacting the web server for any reason. Additionally, reverse proxy can manage compression of these assets.

The popular Nginx web server is also used as a well-known reverse proxy service. Even though Apache is also a reverse proxy option, the Apache web server is also equipped complete with reverse proxy that adds a feature to Apache However, Nginx was originally designed to and is focused on the reverse proxy feature.

Distinguishing Forward Proxy from reverse Proxy Examples

Because "forward" or "reverse" are associated with an impression of directionality and misleading comparisons with "incoming" in addition to "outgoing" traffic and vice versa, these labels are often confusing since both kinds of proxies respond to requests and other responses. A better approach to differentiate between reverse and forward proxy services is to study the requirements of the application that you are building.

Reverse proxy can be a valuable tool for the creation of an approach to offer web-based services on the internet. They serve as your web servers when you connect to the internet.

Forward proxy apps are useful to show clients' personal usage, or even in a business environment. They act as your client's proxy for all communications via the internet.

The practice of separating by use case, instead of focusing on common naming conventions can make it simpler to prevent confusion.

Conclusion

This article describes the definition of a proxy along with the two types of proxy, which are the forward proxy as well as the reverse proxy. Practical applications and a discussion of the benefits were used to distinguish forward proxies from reverse. If you're interested in exploring the possibilities of proxies, then read our tutorial on how to configure Nginx as an internet server and reverse proxy within Apache using the Ubuntu 20.04 server.

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