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It's proxy, also known as a proxy, also called a proxy server. It's a software which acts as an intermediary between client and server on the internet. Without the proxy, a user can send a request to an entity directly through a server, and the server will provide the requested resource directly to the client. Although this method is simple to understand and implement with proxies, it can offer advantages in terms of better performance and privacy, security and many more. In addition, a pass-through proxy, it acts as a security guardian of the internet between clients and servers.

In general, the entire set of server hardware and installed proxy software is often called proxy servers. This article will focus on proxy servers which are usually described as software and also when referring to web servers. This article will provide an extensive description of two main types: a forward proxy and a reverse proxy. reverse proxy. Each kind has its own specific usage instance, but they often get confused due to the same namesake convention.

This article will provide information on what proxies are and what their subtypes are and how they function in the most common configurations. In this article, you'll be able to determine the scenarios where you could benefit from a proxy, and choose the best solution from forward proxy and reverse proxy in any circumstance.

Understanding Forward Proxies

The forward proxy also known as an open proxy serves as an agent for a user who would like to transmit a request over the internet to a source server. In this scenario it is the scenario that all requests made by the client should be directed via this forward proxy. A forward proxy acting in the place of the client will scrutinize the request. It is the first thing to decide if the client is allowed to transmit requests through this specific forward proxy. Then, it will either deny the request or forward it to the server that originally sent it. The client does not get direct internet access. It can only reach what forward proxy permits for it to reach.

The most frequent uses for forward proxies is to increase privacy or anonymity on the internet. Forward proxy utilizes the internet as the client, and in this manner, it may use an alternative IP address in addition to the initial IP address.

Based on the way it has been configured and the way it's configured, forward proxy may give you a variety of choices and permit 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 limitations based on your geographic location.
  
  

Forward proxies can also be used in systems that offer central security and access via permissions, such as at work. If all internet traffic flows through a common forward proxy, an administrator can allow only a handful of clients connection to the web, which is filtered by a common firewall. Instead of putting firewalls in place for the client layer that may include multiple devices with different configurations and users the firewall could be put within the layer which forwards proxy traffic.

Take note that forward proxies must be set up manually for use while reverse proxies might not be detected to the user. Based on the type of IP address the client, it is relayed to the origin server via forward proxy, privacy and anonymity could be granted or not noticed.

There are many possibilities to consider when it comes to forward proxy choices:

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  Apache An open-source, well-known web server that provides forward proxy capabilities.
  
  
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  Nginx is another well-known open-source web server that comes with the ability to forward-proxy.
  
  
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  Squid is an open-source forward proxy which uses the HTTP protocol. This doesn't offer an entire web server service. We recommend that you follow 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 is more suitable for peer-to-peer. You could also find out how to install the Dante proxy for private connections in Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy acts as a representative for a web server, handling any requests that come in from clients on behalf of. The web server could comprise a singular server or multiple servers. It could also function as an application server, such as Gunicorn. In either scenario the request will be received from a client through the web at large. In the majority of cases, the request will go directly to the server with the information the client requires of. Reverse proxy, however, serves as an intermediary, and separates it from directly interacting with the internet's open.

From the viewpoint of the client, interacting with reverse proxy is not any different from connecting to the website server in direct contact. It's the same thing and the client cannot discern the distinction. The client makes a request for an item, is then granted access, with no extra configuration required on the part of the client.

Reverse proxy providers provide features like:

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  The web server is secured centrally.
  
  
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  Sending traffic to be directed according to rules that you define.
  
  
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  Additional functionality for caching.
  
  

While central security is an advantage of both reverse and forward proxy service, reverse proxies give this benefit only to Web server layers, but not to the layer of clients. instead of having firewalls at the layer of web servers that may contain several servers that have different configurations, the bulk of firewall security lies at the layer of reverse proxy. Additionally eliminating the hassle of dealing with firewalls and communicating with requests from clients that are not connected to web servers allows them to concentrate solely on providing resources.

In the case of multiple servers running in a reverse proxy the reverse proxy is also accountable for directing which requests pass through which server. Multiple web servers could be serving the same content, providing different kinds of resources, or a mixture of both. They may use the HTTP protocol similarly to an ordinary web server, however they may include other protocols for application servers like FastCGI. There is the possibility to create a reverse proxy that redirects clients to particular servers based on the requested resource, or to adhere to certain rules for traffic load.

Reverse proxies may also profit by their position prior to web servers, providing caching functionality. Large static files can be configured using caching rules to prevent having to contact web servers for every request. Some solutions allowing users to serve static assets directly without having to connect to the web server in any way. In addition, the reverse proxy is able to handle compression of these assets.

The well-known Nginx web server functions as an extremely popular reverse proxy solution. Although Apache is also a reverse proxy service it is not the only reverse proxy solution. Apache web server is also equipped with an reverse proxy, which adds a feature to Apache however Nginx was originally designed to and focuses on the reverse proxy feature.

Distinguishing Forward Proxy from reverse Proxy Examples

Since "forward" as well as "reverse" are both associated with the perception of directionality, and misleading comparisons with "incoming" and "outgoing" traffic and vice versa, these labels are often confusing because both types of proxies handle requests and responses. The best way to differentiate between reverse and forward proxy is to look at the requirements of the app you're building.

Reverse proxy is an important tool for the creation of an option to provide web-based services via the internet. They are your web servers every time you use the internet.

Forward proxy software is useful to show clients' personal use, or in a business environment. They serve as the proxy for your client for all communications online.

Separating by use case rather than using commonly used naming conventions can make it easier to prevent confusion.

Conclusion

This article will explain what a proxy is along with the two types of proxy, namely the forward proxy and the reverse proxy. Practical applications and a discussion of the benefits were used to differentiate between forward proxies from reverse proxies. If you'd like to discover the possibilities of proxy services, then take a look at our guide on how to set up Nginx as an reverse proxy and internet server for Apache running an Ubuntu 20.04 server.

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