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proxy, also known as proxy, also referred to as proxy or proxy server is a server software that acts in the middle between a client and server over the internet. With no intermediary a user could make a request for an item direct to a server, and servers would serve the resource directly back to the user. While this is a simple method to grasp and use, adding proxies offers benefits like improved speed, privacy, security and many more. As a pass-through layer proxy acts as a gatekeeper of the internet between clients and servers.

In general, the bundled bundle of server hardware that includes proxy software is described as a proxy server. This article will focus on proxy servers that are typically understood as software, as well as those that are used in conjunction with web servers. This article will give a synopsis of the two primary kinds, namely the forward proxy and reverse proxy. reverse proxy. Each comes with its own specific application scenario, and it can be misinterpreted due to the similar terms.

This article will give you an idea of the what proxy services and their subtypes are as well being able to explain how they can be useful in common configurations. In this article, you can identify the situations where you can benefit from a proxy and decide on the best choice between reverse and forward proxy for any particular situation.

Understanding Forward Proxies

Forward proxy also known as open proxy, also known as open proxy is an agent used by the user who wants to make a request via the internet to an the server that made the request. In this situation, it's the case that all requests made by the client would rather be sent directly to the forward proxy. This forward proxy in the place of the client, will look over the request. At the beginning, it will determine whether the client is able to handle requests from this specific forward proxy. It then decides whether to refuse requests or redirect it to the server that originated it. The client does not have an internet connection directly but it is able to access the information that the forward proxy gives the client access.

The most common reason to use forward proxies is to increase privacy or security online. A forward proxy can be used to connect to the internet in place of clients, and in the process, it'll use an alternative IP address to the IP address that was originally used by the client.

Based on how it has been configured in accordance with the way it was set up, a forward proxy could grant you various features in addition to the capability to:

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  Avoid tracking ads.
  
  
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  Circumvent surveillance.
  
  
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  You can determine limitations based on your geographic area.
  
  

Forward proxies are also employed in systems to provide central security and permission-based access, like in a workplace. If all internet traffic is routed via an open forward proxy an administrator can grant access only to specific people to connect on the internet. This is then filtered by a typical firewall. Instead of keeping firewalls in place for the client layer which could comprise a variety of machines that have different user and environmental settings, a firewall may be placed at an intermediate layer.

It is important to remember that forward proxy servers have to be manually setup before they can be used for use and reverse proxy servers are not able to be detected by the user. Depending on whether an IP address for the user is transmitted to the server which originated it via the forward proxy Privacy and anonymity could be granted or made transparent.

There are many alternatives to think about when it comes to forward proxy options:

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  Apache A well-known, open-source web server with forward proxy functionality.
  
  
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  Nginx is another well-known open-source server for web hosting that has forward proxy capabilities.
  
  
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  Squid: A free forward proxy that uses the HTTP protocol. It's not a complete web server service. Take a look at our guide on how to set up Squid proxy so that it allows private connections in Ubuntu 20.04.
  
  
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  Dante Forward proxy that uses the SOCKS protocol instead of HTTP to ensure it is more suited to use scenarios such as peer-to-peer traffic. It is also possible to look at how you can set up Dante proxy for private connections on Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy is an intermediary for a web server that handles any requests that come in from clients on behalf of. Web servers can represent one server or several servers. It could also be an application server, like Gunicorn. In any of these situations an application request is made by a user of the internet at large. In most cases the request will go directly to the web server hosting the information the user is looking for. However reverse proxy serves as an intermediary that helps to protect Web servers from direct interaction with the internet's open.

From the perspective of a user that is a user's viewpoint, interfacing using reverse proxy is the same as working with Web server directly. It works similar to the web server and the client is unable tell the distinction. The client can request the resource, and is then provided with it without any additional configuration required on the part of the client.

Reverse proxy proxies provide certain features, such as:

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  Centrally secured for Web Server Layer.
  
  
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  Controlling traffic that is incoming by implementing rules that you establish.
  
  
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  The caching functionality was added to the application.
  
  

While central security is a benefit of both reverse and forward proxy, reverse proxies provide this function to their web server layer, and not the client layer. instead of maintaining firewalls within the layer of web servers which may contain multiple servers with different configurations the majority of the firewall security is aimed on the reverse proxy layer. Furthermore, the detachment of the responsibility of interfacing with a firewall and communicating with requests from clients from web servers enables them to focus solely on satisfying the requirements of their clients.

If there are multiple servers that are running via a reverse proxy the reverse proxy may also be responsible for the direction of the requests that are directed to which server. There may be several web servers hosting the same resource, but each of them offering a different kind of resources or a combination of both. These servers may be running an HTTP protocol to serve as a standard web server, but they can include applications server protocols like FastCGI. You can configure a reverse proxy to redirect visitors to specific servers based on the kind of resource they're looking for, or to follow certain rules regarding traffic load.

Reverse proxies are also able to make use of their position prior to web servers through the capacity of caching. Large static assets can be able to be configured using caching rules that prevent them from getting into web servers with every request. There are solutions offering the possibility of providing static files in a direct manner without connecting directly to the website server. Furthermore, the reverse proxy is able to manage compressing these assets.

The renowned Nginx webserver is also a well-known reverse proxy choice. Although Apache is also a reverse proxy solution however, the Apache web server also comes equipped with reverse proxy function, it is an additional feature of Apache but Nginx was initially designed and focused on the reverse proxy function.

The distinction between Forward Proxy and Reverse Proxy Use Examples

Because "forward" and "reverse" have connotations of directionality, they also create false comparisons with "incoming" or "outgoing" traffic. They can be confusing as both types of proxy are able to manage requests and responses. The best method to distinguish between reverse and forward proxies is by analyzing the requirements of the application you're building.

A reverse proxy could be helpful when building an approach to connect web applications to the internet. They function as servers when you interact using the internet.

Forward proxy can be helpful when placed before the client for your private use, or in a work setting. They are your client's proxy when you use the internet.

Distinguishing by use case instead of focusing on similar naming conventions will ensure that you do not get confused.

Conclusion

This article explains what a proxy is along with two types of proxy, namely the forward proxy and the reverse proxy. Practical applications and an examination of useful features were utilized to distinguish between reverse and forward proxies. If you're interested in knowing more about the use of proxy servers, then you must read our tutorial on how to set up Nginx as web server and reverse proxy on Apache on an Ubuntu 20.04 server.

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