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"proxy" refers to a software "proxy" means the idea of a proxy frequently referred to as a proxy server is software that serves to act as an intermediary for server and a client via the internet. Without proxy, a user can send a request for an item directly to a server, and the server would then serve the requested resource directly to the user. While this is a simple method to comprehend and implement, adding proxies offers benefits such as increased performance and security, privacy, and so on. As a layer of pass-through, the proxy functions as a guardian for the internet between clients and servers.

In general, the set of server hardware that is paired with the software to install proxy servers is often called proxy servers. This article will concentrate on proxy servers which are generally considered to be software and specifically in relation to web servers. We will provide a brief overview of the two main types of proxies, which is forward proxy and reverse proxy. forward proxy and reverse proxy. reverse proxy. Each type has a different use case, and is often misinterpreted due to the similar terms.

This article will provide you with an idea of how proxies work, what their subtypes are and the ways in which they can be beneficial in a variety of configurations. If you read this article you'll learn to identify instances where the use of proxies is beneficial, and then determine the best option between forward and reverse proxy for any particular situation.

Understanding Forward Proxies

Forward proxy is also referred to by the name of the open proxy, acts as the representative of the client who is trying to transmit an internet request to a source server. In this situation, any request made by the user will instead be made through forward proxy. Forward proxy acting in place of the client, will examine the request. Then, it will determine whether the client is allowed to make requests through this particular forward proxy. Then, it'll orally reject a request and send it back to its server that originated the request. The client is unable to establish a direct connection with the Internet. It can only reach what the forward proxy allows the client to access.

The most common reason to use forward proxies is to improve security or privacy when surfing the internet. A forward proxy can be used to connect to the internet rather than clients, and in this process, it uses an IP address that is different from the original IP address of the client.

Depending on how it's been setup, and based on the way it's configured forward proxy can provide a variety of functions, allowing users to:

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  Beware of ad-tracker.
  
  
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  Circumvent surveillance.
  
  
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  You can determine limitations based on your geographic location.
  
  

Forward proxies are also utilized to secure systems that are centralized and access is based on permissions, such as in a workplace. If all internet traffic flows through an open forward proxy layer, an administrator could limit access for only a limited number of internet users and be filtered by an common firewall. Instead of establishing filters for client layers, which can be used by a number of computers that have different environments and types of users there is a way to set up a firewall at the front proxy layer.

Take note of the fact that forward proxies must be manually configured to be used, whereas reverse proxies can be hidden from the view of clients. Based on whether or not your IP address the user is relayed to an server of origin through the forward proxy, privacy and anonymity are granted or denied.

There are a variety of possibilities to think about when it comes to forward proxies.

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  Apache An open-source, well-known web server that has forward proxy capabilities.
  
  
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  Nginx is another widely-used open-source webserver that includes forward proxy features.
  
  
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  Squid: A no-cost forward proxy which uses an HTTP protocol. It's not included with the complete web server. Learn more about how to configure Squid proxy to allow private connections to Ubuntu 20.04.
  
  
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  Dante Forward proxy that utilizes the SOCKS protocol instead HTTP which allows it to be more suitable for use instances like peer-to-peer traffic. You might also want to know how to configure Dante proxy to allow private connections with Ubuntu 20.04
  
  

Understanding Reverse Proxies

A reverse proxy functions as an agent for a web server that handles customer requests on behalf of. It could represent one or more servers. Also, it could serve as an app server such as Gunicorn. In either scenario the request will be made via the internet in general. The request is typically directed directly to the web server that hosts the resources the client is in need of. In contrast, a reverse proxy is a intermediary that isolates Web servers from any direct interactions with the public internet.

From the viewpoint of the client an individual's viewpoint, the process of using reverse proxy is the same than working with the server by itself. It's the same, but the client can't see the difference. The client requests the resource, and is then supplied with it, without additional configuration required by the client.

Reverse proxies provide features like:

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  The web server is secured centrally.
  
  
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  The direction of traffic coming in is according to the rules you establish.
  
  
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  A new feature to cache has been added.
  
  

While central security is a benefit offered by both forward and reverse proxy servers. Reverse proxy providers offer this feature to only the server layer and they do not offer this feature to clients. instead of the maintenance of firewalls at the server level that could include multiple servers with various configurations, the bulk of firewall security is concentrated in the reverse proxy layer. In addition, removing the burden of working with firewalls and interacting to requests from clients away from web servers enables the firewall to focus on serving the requirements of their customers.

When there is a multitude of servers hosted by a reverse proxy, this reverse proxy will be also responsible for how requests are routed to the server that is hosting them. Many web servers may be providing the exact same service, but offering various kinds of resources or a mix of the two. They may employ an HTTP protocol to perform the role of a web server in the traditional sense, however they can also use applications server protocols like FastCGI. You can also set up reverse proxy settings to send users to specific servers based on the resource requested or to follow certain rules for traffic load.

Reverse proxies can also benefit from their position before web servers by offering caching capabilities. Large static assets may be configured using caching rules to avoid hitting web servers on every request. There are options that allow you to serve directly static assets, without connecting with the server on any manner. Additionally, reverse proxy can manage compressing these assets.

The renowned Nginx web server functions as a powerful reverse proxy service. Even though Apache can also be a reverse proxy service it is not the only one. Apache web server comes equipped with a reverse proxy feature which is a feature available to Apache However, Nginx was initially designed to specifically focus on reverse proxy features.

The distinction in Forward Proxy and Reverse Proxy Use Cases

Since "forward" as well as "reverse" have connotations of directionality as well as misleading comparisons to "incoming" and "outgoing" traffic These labels could be confusing because both kinds of proxies deal with the processing of requests and replies. An alternative method to distinguish between reverse and forward proxy is to analyze the requirements of the program you're creating.

Reverse proxy can be useful when you are developing a method to connect web-based applications on the internet. They act as your web servers whenever you use the internet.

Forward proxy are helpful when you are before customers for your personal use or in a professional setting. They serve as the proxy for your client for interactions on the internet.

Differentiating by case of use instead of focusing solely on common naming conventions can help you avoid confusion.

Conclusion

This article explains what a proxy is and provides two types: the forward proxy and the reverse proxy. Practical examples of its use and a review of the advantageous features were used to distinguish forward proxies from reverse proxies. If you're looking to know more about proxy servers, you should check out our tutorial on how you can configure Nginx as a reverse proxy using Apache on an Ubuntu 20.04 server.

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