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It's a proxy or proxy server. is a server-related software that serves as an intermediary between a server and a client via the internet. Without an intermediary, a customer can send a request any resource directly to the server, and the server will serve any requested resources directly to customer. While this process is simple to understand and apply using proxy servers, it could provide advantages such as more performance and privacy, security and much more. As a pass-through layer, the proxy serves as a protector of the internet between the servers and clients.

Generally speaking, the bundled combination of server hardware and the software used to set up proxy installations is usually referred to by the name proxy servers. In this article, we will concentrate on proxies that are typically thought of as software, and those that are used to complement web servers. This article will give a detailed breakdown of the two main kinds of proxies: a forward proxy and a reverse proxy. reverse proxy. Each kind of proxy has its own specific application scenario, which is often misunderstood due the similar naming convention.

This article will provide you with an understanding of what proxy servers and their subtypes are as well as how they can be used in common setups. In this article, you can identify the situations in which an effective proxy can be useful, and select the correct solution in between forward and reverse proxy to suit your needs in any given scenario.

Understanding Forward Proxies

In other words, a forward proxy also known as the open proxy is the representative of a client which is attempting to send a request via the internet to the server from which it originated. In this case, all request to send it from the client will be made by the forward-proxy. In this case this forward-proxy acting the place of the client will review the request. The first step is to establish what authorization the user has to make requests to this particular forward proxy. The forward proxy will then deny this request, and then send it back to the original server. The client isn't able to have direct connection to the internet; it can only reach what the forward proxy allows its access.

One of the most common uses for forward proxies is greater privacy or anonymity on the internet. Forward proxy can be used to connect to the internet in lieu of a client, and in that process it could use an alternate IP address in place of the original IP address of the client.

Depending on how they were established in the past, forward proxy servers can provide a variety of functions and permit you to:

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

Forward proxies are also used in security systems that require centralized and permission based access for instance, at work. When all internet traffic goes through an open forward proxy layer an administrator is able to allow access only to specific users to the internet, and this is filtered by an common firewall. Instead of putting firewalls in place to protect the client layer which could comprise a range of computers with different user and environmental settings and environment, a firewall may be placed in an forward proxy layer.

Take note of the fact that forward proxies have to be manually configured in order to be used However reverse proxy will be not noticed by the client. Based on whether the IP address of a client is sent to the source server via an forward proxy. Privacy and security may be granted or not noticed.

There are several possibilities to look into to find forward-looking proxy services:

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  Apache is a well-known open source web server, that offers forward proxy capabilities.
  
  
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  Nginx: Another widely used open-source server for web hosting that has forward proxy functions.
  
  
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  Squid is an open-source forward proxy which makes use of an HTTP protocol. This does not include an entire web server service. We've got a guide on how to install Squid proxy for private connection to Ubuntu 20.04.
  
  
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  Dante Forward Proxy that utilizes the SOCKS protocol instead of HTTP which makes it better appropriate for scenarios like peer-to-peer connections. It is also possible to look at how to configure a Dante proxy for private connections in Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy is an agent of a web server, handling the incoming requests of clients on behalf of. This web server may consist of a single server or even multiple servers. It can also function as an application server such as Gunicorn. In any of these situations a request could come from a user via the internet at large. Most of the time the request will be sent direct to the website that hosts the resources the client is in need of. Reverse proxy acts as an intermediary, which separates Web servers and direct communication with the internet.

From a client's perspective that is a user's viewpoint, interfacing with reverse proxy isn't that different from connecting directly to your website server. It's exactly the same, but the client can't discern the difference. The customer requests an item, and it is delivered with no additional configurations that need to be completed by the client.

Reverse proxy proxies may offer some features, including:

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  A central layer of security to protect the server.
  
  
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  Controlling traffic inbound based on rules that you can establish.
  
  
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  A new feature to cache has been added.
  
  

While central security is an advantage of both forward and reverse proxy service, reverse proxies provide this feature to the web server layer, and not to clients. In lieu of maintaining firewalls at the web server layer, which might contain several servers with different configurations, a majority of firewall security could be focused on this layer. Additionally, getting rid of the necessity of interfacing with firewalls as well as interacting with clients' requests through web servers enables them to concentrate solely on meeting the requirements of their clients.

If there are several servers using a reverse proxy, the reverse proxy also takes care of the way requests are routed to which server. A number of web servers could be offering the same content but they may offer different kinds of content, or a mixture of the two. These servers could use the HTTP protocol just like a standard web server, however, they might also use applications server protocols like FastCGI. You may also set up reverse proxy servers to direct clients to specific servers in accordance with the resource requested or to adhere to certain rules for traffic load.

Reverse proxies may also take advantage of their placement in front of web servers, by offering the ability to cache data. Large static files can be set using caching rules to prevent the server from getting hit with every request, with certain solutions providing the option to provide static files directly without touching the server in any way. Additionally, the reverse proxy could be able to handle compressing these files.

The popular Nginx web server has become a wildly popular reverse proxy service. While it is true that the Apache web server is also equipped with a reverse proxy function and is an alternative choice for Apache as opposed to Nginx was originally designed and was designed specifically for reverse proxy functions.

Differentiating Forward Proxy and Reverse Proxy Use Cases

Because "forward" along with "reverse" are associated with an impression of directionality and a false comparison with "incoming" as well as "outgoing" traffic. These labels can confuse because each type of proxy handles both responses and requests. Instead, a better way to differentiate between forward and reverse proxy is to take into account the needs of the application you're developing.

A reverse proxy is useful in the design of solutions that deliver web-based apps via the internet. They represent your web servers in all interactions on the web.

A forward proxy can be helpful when it is placed in front of client traffic for your personal use or in a work environment. They represent your client traffic whenever you interact on the internet.

Differentiating by case of use instead of focusing on the common naming conventions will help in avoidance of confusion.

Conclusion

This article describes what a proxy is, with the two primary types, namely the forward proxy and reverse proxy. Examples of practical applications and a review of the most useful attributes were used to define forward proxies and reverse proxy. If you're interested in learning more about the process of implementing proxy services, you can refer to our guide on how to set up Nginx as a web server and reverse proxy using Apache running on the Ubuntu 20.04 server.

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