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The word "proxy" refers to the concept of a proxy as well as a proxy server, a software that acts to act as an intermediary for client and server over the internet. Without the need for proxy, a user can send a request directly to a server and the server would provide the requested resource directly at the requester's expense. While this approach is straightforward to understand and use, adding proxies offers advantages such as enhanced performance and privacy, security and many more. As a further layer of pass-through, the proxy serves as a security guardian of the internet between clients and servers.

Generally speaking, the combined equipment of servers with the installed proxy software is also often referred too as proxy servers. This article will concentrate on proxies typically considered as software, and specifically, in relation with web server. This article will give an explanation of the two major kinds, namely one being a forward proxy and reverse proxy. reverse proxy. Each type has a distinct use case, often confused because of the similar terminology.

This article will give you the understanding of the different types of proxies, which subtypes they belong to and how they function in various configurations. In this guide, you'll be able to determine the circumstances in which a proxy is beneficial, and choose the correct solution between forward and reverse proxy in any circumstance.

Understanding Forward Proxies

A forward proxy, sometimes referred to an open proxy, is a means of intermediary for clients trying to make a request via the internet to connect to a source server. In this situation the entire effort to send requests from the user is instead made via the forward proxy. This forward proxy acting in place as the customer, is able to examine at the request. In the beginning, it will decide whether this client is able to accept requests via this particular forward proxy. It will then deny requests or redirect it to the origin server. The client is not allowed directly access to internet. It is only able to access what the forward proxy permits it to access.

The most common reason for using forward proxy services is to obtain greater privacy or security on the internet. Forward proxy connects to the internet as the client and, in doing so, it could use a different IP address to that of the client's original IP address.

Depending on how it has been configured in accordance with the method of configuration, a forward proxy could offer a range of features and let you:

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  Do not click on ads that track you.
  
  
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  Circumvent surveillance.
  
  
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  Find restrictions based on your geolocation.
  
  

Forward proxies also are used in systems of centralized security and access based on permissions, like at a workplace. If all traffic on the internet flows through a forward proxy open layer administrators can allow access only to a select group of users to the internet. This is then filtered by a standard firewall. Instead of setting up firewalls for the client layer, which can be used by several computers that have different configurations, environment, the firewall could be set up at the layer that forwards proxy traffic.

It is important to remember that forward proxies must be manually configured for use and reverse proxies may not be noticed by the user. Based on the type of IP address a client is transmitted to the server from where it came from through the forward proxy Privacy and anonymity can be granted or denied.

There are several options to think about for forward proxy possibilities:

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  Apache An open-source, well-known web server that offers forward proxy capabilities.
  
  
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  Nginx: Another well-known open-source server for hosting websites with forward proxy capabilities.
  
  
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  Squid is an open source forward proxy that uses the HTTP protocol. It's not the entire webserver system. We have a step-by-step guide to installing Squid proxy to permit private connections on Ubuntu 20.04.
  
  
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  Dante Forward Proxy which uses the SOCKS protocol instead of HTTP this makes it more suitable for use scenarios such as peer-to-peer traffic. It is also possible to learn how to configure a Dante proxy to connect privately in Ubuntu 20.04
  
  

Understanding Reverse Proxies

A reverse proxy serves as an intermediary between a web server, handling any requests that come in from customers on its behalf. This server can function as a one server, or multiple servers. It could also serve as an application server such as Gunicorn. In any event it is possible to send a request through the internet in general. Typically, the request will go directly to the web server and include the information the user is seeking. However, reverse proxy serves as an intermediary shielding the server from direct communication with the internet's open.

From a consumer's point of perspective, the experience of working using reverse proxy isn't much different than working with the server itself. It's exactly the same thing, however the client isn't able to distinguish between the two. The client is able to make a request for the resource and it is provided with it, with no additional configuration required on the part of the client.

Reverse proxy providers can provide services such as:

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  Security centralized for web servers.
  
  
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  Incoming traffic is directed based upon rules you set.
  
  
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  The caching functionality was added to the application.
  
  

While centralized security is an advantage of both forward and reverse proxy servers, reverse proxies offer this feature at the layer of web servers, but not to the client layer. instead of the maintenance of firewalls at Web server layers that could comprise multiple servers with different configurations, the bulk of the firewall security is concentrated at reverse proxy layers. Additionally, removing the burden of interacting with firewalls and responding to requests from clients that are not on web servers lets them focus on delivering the needs of their clients.

If there are multiple servers running as a reverse proxy, the reverse proxy takes care of directing which requests go to which server. There could be multiple web servers offering the same service, all offering different kinds of resources, or a combination of both. These servers can be using the HTTP protocol as a conventional web server. But, they may include other protocols for application servers such as FastCGI. It is possible to configure a reverse proxy to direct users to a particular server based on the service they require or to adhere to specific rules regarding traffic load.

Reverse proxies are also able to benefit from their position ahead of web servers, offering the capability to store data. Large static assets can be set using caching rules, so that they prevent Web servers from being hit every time a request is made. Certain solutions allow you to provide static files directly without connecting to the web server in any way. Furthermore, the reverse proxy could manage the compression of these files.

The popular Nginx web server is also a reliable reverse proxy service. You can also use it, Apache web server with a reverse proxy but it's an additional option for Apache while Nginx was initially designed and specifically designed for reverse proxy features.

Differentiating Forward and Reverse Proxy Use The Case

Because "forward" and "reverse" have associations with directionality, as well as false comparisons with "incoming" and "outgoing" traffic, these labels could be confusing because both kinds of proxy can handle requests as well as responses. An alternative method to differentiate between reverse and forward proxy is to look at the requirements of the application you're creating.

A reverse proxy is useful when building an infrastructure to support web-based applications via the internet. They serve as your web servers for all interactions over the internet.

Forward proxy can be beneficial when it is placed in front of customers for personal use, or in a corporate environment. They are a representation of the customer's data whenever you interact on the internet.

The ability to differentiate by the use of case instead of focusing solely on standard names can aid you in avoidance of confusion.

Conclusion

The article clarified the significance of a proxy that has two types: forward proxy and reverse proxy. Practical examples of use as well as an examination of useful attributes were used to identify the two kinds of proxy which are reverse and forward. If you're interested to learn more about the advantages of proxies, then we suggest you read our guide on how to install Nginx to function as an Internet server and reverse proxy on Apache running on the Ubuntu 20.04 server.

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