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It is an proxy is sometimes referred to as an application for a proxy server which acts in the role of an intermediary the server and the client via the internet. Without the proxy, the client can make a request for a source directly through a server, and the server would deliver the resource directly back to the user. Although this is a simple process to grasp and implement however the addition of proxy servers may provide advantages such as enhanced security, performance, privacy as well as other benefits. As a further layer of pass-through proxy servers serve as a security layer for the internet between clients and servers.

In general, the combination of server hardware and installed proxy software is often referred as proxy servers. The article we'll focus on proxies typically considered to be software, and specifically, in relation with web server. We will also discuss of the two principal kinds of proxies: two types: a forward proxy and a reverse proxy. Each has its own specific usage situation, however they are often confused because of a similar name convention.

This article will give you some understanding about what proxies and their subtypes are, as well as how they are useful for common setups. In this article, you'll understand what scenarios where you could benefit from a proxy and then pick the best choice between reverse and forward proxy, in each scenario.

Understanding Forward Proxies

A forward proxy, also known as the open proxy is an agent for users who are trying to transmit a request over the internet to a source server. If this is the case, any attempts to send requests made by the client will rather be sent through this forward proxy. In this situation the forward proxy acting in in the place of the customer will examine the request. First, it will determine if the client is able to make requests via this specific forward proxy. It then decides whether to reject any request or forward it to the original server. The client is not able to establish a access to internet in any way, it can only access what the forward proxy allows it to access.

The most common reason to utilize forward proxy is for greater privacy or protection online. Forward proxy makes use of an internet connection as a client, and as such, it uses an alternative IP address to the IP address of your client.

Depending on how it's been installed in the past forward proxy servers could provide a variety of features and options, including:

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  Beware of ad-tracker.
  
  
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  Circumvent surveillance.
  
  
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  Find restrictions based on the geolocation of your home.
  
  

Forward proxies may also be utilized in systems to provide central security as well as permission-based access, such as in a workplace. If all internet traffic flows via an open forward proxy, the administrators may allow only specific clients access to the internet via an common firewall. Instead of maintaining firewalls for the client layer that could involve many machines with varying configurations and users, a firewall can be set up at the forward proxy layer.

Be aware that forward proxy settings must be set up manually before they can be used for use, while reverse proxy servers are not able to be observed by the user. Depending on the type of IP address of a user is relayed to the server where it originated through the forward proxy, privacy and anonymity could be granted, or to go unnoticed.

There are a myriad of options to look into for 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 another well-known open-source server for web hosting that has the ability to forward-proxy.
  
  
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  Squid is an open-source forward proxy that uses the HTTP protocol. It's not the entire Web Server System. It is possible to refer to our guide on how you can create Squid proxy to connect privately in Ubuntu 20.04.
  
  
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  Dante forward proxy, which uses on the SOCKS protocol rather than HTTP this makes it better suited for scenarios such as peer-to-peer connections. You can also look into the steps to install the Dante proxy that allows private connections in Ubuntu 20.04
  
  

Understanding Reverse Proxies

A reverse proxy functions to act as an intermediary a web server and it takes responsibility for incoming requests from customers for the benefit of. This server could function as a single server or as a series of servers. It could also be an application-server such as Gunicorn. In either of these scenarios the request will be made by a client via the internet in general. The request would typically be sent directly to the web server that holds all the resources that the client is seeking. A reverse proxy is a intermediary, shielding this webserver from direct communication with the open internet.

From a perspective of the user from a client's perspective reverse proxy use is similar to interacting with the server by itself. It is functionally similar, but the user is unable to tell the distinction. Client asks for a resource then receives it without any extra configuration needed from the client.

Reverse proxy providers provide features like:

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  The web server is secured centrally.
  
  
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  The direction of traffic coming in is to you based on rules you set up.
  
  
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  The caching functionality has been added to the app.
  
  

Although centralized security is a benefit of both reverse and forward proxy systems, reverse proxy providers provide this feature to this web server layer and not to the layer that clients use. instead of establishing firewalls at Web server layers that may include many servers and different configurations, the bulk of firewall security can be focused on the reverse proxy layer. Furthermore, removing of the hassle of interfacing with firewalls and interacting with client requests outside of web servers allows the firewall to focus on supplying resources.

If there are multiple servers operating in reverse proxy and the reverse proxy determines the way requests are routed to which server. There are many web servers operating on this server providing different kinds of resources or a mix of the two. These servers utilize the HTTP protocol just like a standard web server, but they may also include application server protocols such as FastCGI. It is possible to configure reverse proxy servers to send users to particular servers based on the kind of resource they're seeking or to follow specific guidelines for the amount of traffic.

Reverse proxies can benefit from their position over web servers due to the power of caching. The large static files can be configured using caching rules to prevent hitting web servers with each request. Some options allowing users to serve static assets without connecting directly to web servers in any way. Additionally the reverse proxy could manage compressing these assets.

The popular Nginx web server also functions as a popular reverse proxy solution. While it's factual that Apache webserver also equipped with a reverse proxy feature, it's an additional feature available only for Apache but Nginx was designed originally for and is specifically designed for reverse proxy functions.

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

Since "forward" in addition to "reverse" have connotations of directionality as well as misleading distinctions between "incoming" and "outgoing" traffic The labels could be confusing because both types of proxies respond to requests and receive responses. In addition, the most effective method of separating between reverse and forward proxy is to look at the requirements of the app you're creating.

Reverse proxy can be a valuable tool when you are designing a solution to deliver web-based applications via the internet. Reverse proxy servers represent your website whenever you interact on the web.

Forward proxy is useful to display clients for personal use or in a work environment. They are a representation of information about the client every time you connect to the internet.

Separating by case of use instead of focussing on similar name conventions will ensure you don't get confused.

Conclusion

This article describes the definition of a proxy with the two major types which are the reverse proxy and the forward proxy. Examples of how to use them as well as a discussion of the most useful features were used to establish the distinction between reverse and forward proxies. If you're interested in learning more about the possibilities of proxies, then read our guide on how to configure Nginx as a reverse proxy to Apache on one Ubuntu 20.04 server.

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