It is an proxy, also called a proxy server. It's a software which acts as an intermediary between a server and a client over the internet. In the absence of a proxy server, a client can send a request to an item directly to a server, and the server will provide the requested resource directly to the user. While this approach is straightforward to understand and implement with proxies, it can bring advantages in terms more performance as well as privacy, security and many more. In addition, a pass-through proxy acts as an extra security layer on the internet between servers and clients.

In general, the collection of hardware used by servers and installed proxy software is also commonly called proxy servers. This article will focus on proxy servers that are typically described as software and also in the context of web servers. This article will present an extensive description of two types of proxies: forward proxy and reverse proxy. reverse proxy. Each type has its own usage instance, but they often get misunderstood due to the similar namesake convention.

This article will provide you with information about what proxies are and what their subtypes are, and how they work in the most common configurations. In this article you will be able to identify the scenarios where you could benefit from a proxy, and decide on the most appropriate solution between reverse proxy and forward proxy in any circumstance.

Understanding Forward Proxies

The forward proxy, also known by its name of the open proxy, acts as a representative for a client who would like to send a request through the internet to an origin server. In this scenario it is the scenario that all requests made by the user would prefer to be directed via the forward proxy. A forward proxy acting in on behalf of the user, will scrutinize the request. The first step is to decide if the client is allowed to make requests through this specific forward proxy. Then it can either reject requests or redirect it back to the original server. The client does not have direct access to the internet. It only has access to the internet that the forward proxy allows the client to access.

One of the most frequent reasons for forward proxy is to improve privacy or anonymity on the internet. A forward proxy makes use of the internet as a client, and in this manner, it may use an alternative IP address to the client's initial IP address.

Depending on how it's been configured and the way it's configured forward proxy could provide you with a range of options and allow you to:

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  Avoid tracking ads.
  
  
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  Circumvent surveillance.
  
  
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  You can determine restrictions based upon your geographical location.
  
  

Forward proxies are also utilized in systems that provide centralized security and allow access through authorizations, for instance in workplaces. When all internet traffic goes through a common forward proxy, an administrator could grant only a small number of users access to the internet, which is then filtered by a common firewall. Instead of keeping firewalls in place for the client layer which could include multiple computers that have different configurations and clients, the firewall can be placed in the layer that forwards proxy traffic.

Note that forward proxies must be set up manually for use while reverse proxies could go unnoticed by the client. Depending on the type of IP address of the customer, if it is relayed back to the origin server through the forward proxy, privacy and security could be granted or left unnoticed.

There are many options to consider to find forward proxy alternatives:

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  Apache An open source, well-known web server that provides forward proxy features.
  
  
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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 that utilizes an HTTP protocol. Squid doesn't provide the complete Web server. It is possible to refer to our step-bystep guide for setting 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. It's also possible to find out how to set up an Dante proxy to connect private connections on Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy serves as a proxy for web servers, which handles incoming requests from clients on behalf of. The web server could comprise a singular server or multiple servers. Additionally, it can serve as an application server such as Gunicorn. In any case, the request is received from a client through the web at large. Most of the time the request will go directly to the web server, containing the information that the client needs of. A reverse proxy serves as an intermediary, and separates it from direct interaction 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 the same thing, and the client doesn't know the difference. The client makes a request for an item, it 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 rules that you can determine.
  
  
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  Additional features to cache data.
  
  

Central security is an advantage of both reverse and forward proxy services, reverse proxy providers provide this benefit to Web layer servers, but not to the layer of clients. instead of maintaining firewalls on the layer of web servers that may contain several servers with various configurations, the majority of firewall security is concentrated on the reverse proxy layer. In addition to removing the responsibility of communicating with firewalls and coordinating requests from clients away from web servers allows them to concentrate solely on providing resources.

In the case of multiple servers that are through a reverse proxy,, the reverse proxy also is responsible for directing which requests pass through which server. Multiple web servers might be serving the same content, supplying various kinds of resources or a combination of the two. They can use the HTTP protocol in the same way as traditional web servers but they could include other protocols for application servers such as FastCGI. You can set up a reverse proxy to direct clients to specific servers depending on the resource requested or to follow specific guidelines for traffic load.

Reverse proxies also gain from their placement in front of web servers, providing caching functions. The large static file can be configured using caching rules to prevent having to call web servers on every request. There are even solutions allowing users to directly serve static content without touching the web server for any reason. In addition, the reverse proxy can handle the compression of these files.

The popular Nginx web server is also used as an extremely popular reverse proxy service. While Apache has a reverse proxy service however, the Apache web server is also equipped with an reverse proxy that is an additional feature for Apache however Nginx was initially designed for and is focused specifically on its reverse proxy feature.

Distinguishing Forward Proxy from reverse Proxy Examples

Because "forward" as well as "reverse" are associated with a sense of directionality and misleading comparisons with "incoming" and "outgoing" traffic These labels could be confusing because both types of proxies respond to requests and other responses. A better approach to differentiate between reverse and forward proxy is to look at the specifications of the application that you are building.

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

Forward proxy applications are beneficial to show clients' personal usage, or even in a professional setting. They act as your client's proxy for all interactions online.

Separating by use case, instead of using common naming conventions can make it easier for people to stay clear of confusion.

Conclusion

This article will explain the definition of a proxy along with the two types, which are the forward proxy as well as the reverse proxy. Practical applications as well as a brief overview of the beneficial features were utilized to differentiate forward proxies from reverse proxies. If you're interested in exploring the possibilities of proxies then take a look at our guide on how to configure Nginx as an internet server and reverse proxy for Apache on an Ubuntu 20.04 server.

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