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The term "proxy" refers to a proxy is also known as a proxy server software that acts to act as an intermediary between client and server on the internet. Without a middleman the user would an attempt to request the resource directly to a server, and the server will serve the requested resource directly for the client. Although this is a simple process to understand and apply the addition of proxies can bring benefits such as more performance, privacy and security, and a lot more. Apart from offering a security layer they also act as a guardian for the internet between clients and servers.

The bundled package of servers that have installed proxy software is usually referred to as proxy servers. This article will concentrate on proxy servers that are traditionally referred to as software, but also when referring to web servers. We will provide a brief overview of the two primary types: one is a forward proxy and reverse proxy. reverse proxy. Each type has a different usage, which can be confusing due to the identical name-based convention.

This article will equip you with the knowledge of the different types of proxy services, their subtypes, and ways they can be useful for common setups. In this article you'll be able to discern the scenarios in which you can benefit from a proxy. You can also choose the best option the case of forward or reverse proxy for any scenario.

Understanding Forward Proxies

Forward proxy, also referred to in the context of being an open proxy, acts as the representative of a customer who wishes to send requests over the internet to an the server that initiated it. In this situation, it's the scenario that all requests made by the client will instead be directed direct through forward proxy. This forward proxy acting in place on behalf of client examine at the request. At first, it will decide whether the client is allowed to submit requests through this particular forward proxy. It will then either deny requests or redirect it to the origin server. The client is not allowed an internet connection directly. it can only be capable of accessing the data that forward-proxy permits the client to access.

One popular reason to use forward proxy is the desire for more privacy or security online. Forward proxy is able to access the internet using the client, and in this process, it uses another IP address, in contrast to your client's IP address.

Depending on how it's been configured, based on the configuration forward proxy can perform a variety of tasks as well as the ability 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 can also be utilized in systems of central security and access based upon permissions, like, in a workplace. In the event that all internet traffic is routed through an open forward proxy, an administrator can limit access to specific clients to the internet through the common firewall. Instead of implementing firewalls on the client layer, which can include multiple machines that have different configurations and user the firewall can be installed at the forward proxy layer.

Keep in mind that forward proxies must be manually set up to work the reverse proxy, while forward proxies may not be noticed by the user. Based on the kind of IP address a client is transferred to the server that originated it via forward proxy, privacy and anonymity may be granted or not.

There are a myriad of options to investigate forward proxy options:

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  Apache: A popular open-source web server, which offers forward proxy features.
  
  
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  Nginx: Another renowned open-source web server with forward proxy capabilities.
  
  
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  Squid: An open-source forward proxy that uses the HTTP protocol. It doesn't provide a complete website server program. It is possible to refer to our instructions on how to set up Squid proxy to permit private connections in Ubuntu 20.04.
  
  
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  Dante Forward Proxy that uses the SOCKS protocol instead of HTTP which makes it more suited to use cases like peer-to-peer connections. You could also find out how to set up Dante proxy to permit private connections on Ubuntu 20.04
  
  

Understanding Reverse Proxies

A reverse proxy acts in the capacity of an agent to a server on the internet and manages the incoming requests of clients. The web server could serve as a single server or multiple servers. Additionally, it can be used as an app server such as Gunicorn. In any of these situations, a request would come from a user of the internet in general. The majority of the time the request will be sent directly to the web server which has all the resources the client seeks. In contrast, a reverse proxy serves as an intermediary, protecting this webserver from direct interaction with the open internet.

From the perspective of an individual or user's point of view the procedure of using reverse proxy is not much different from working with the web server directly. It's functionally the same however the client is unable to tell the distinction. The client sends a request for resources, which is followed by receiving it, with no additional configuration required from the client.

Reverse proxy proxies are able to provide some features, including:

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  Secured centrally for Web Server Layer.
  
  
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  Controlling traffic inbound according to rules you can create.
  
  
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  The caching function was added to the application.
  
  

While centralized security is a benefit of both forward and reverse proxy services, reverse proxies give this benefit to Web server layers and not to the client layer. instead of the maintenance of firewalls on Web server layers that could contain multiple servers with various configurations, the majority of the firewall security is aimed on the reverse proxy layer. Furthermore, removing the obligation of interfacing with firewalls and interacting with requests from clients via web servers enables them to concentrate on delivering resources.

In the event of multiple servers working behind a reverse proxy, it also manages how requests are routed to the correct server. There are many web servers offering the same service, and each offering different kinds of resources or a mix of both. These servers could use an HTTP protocol to function as a standard web server, but they can also incorporate application server protocols like FastCGI. You can create a reverse proxy to route users to specific servers according to the resource being requested or to adhere to specific rules regarding traffic load.

Reverse proxies also benefit from their placement in front of web servers through the capability of caching. Large static assets can be set up using caching rules in order that they do not have to connect to web servers every time they need to make a request. There are solutions that provide the possibility of serving directly static assets without needing to connect to the web server in any way. Furthermore, reverse proxy can handle compression of these assets.

The popular Nginx web server can be described as a reliable reverse proxy option. Although you can utilize Nginx, Apache web server also has a reverse proxy as an additional function of Apache as opposed to Nginx was designed initially for and concentrates on the reverse proxy function.

The distinction between Forward Proxy and reverse Proxy Use. The difference between Forward Proxy and Reverse Proxy Use

Since "forward" or "reverse" have connotations of directionality, and false connections to "incoming" and "outgoing" traffic the labels can be confusing as both kinds of proxy services are capable of handling requests as well as respond. The best way to distinguish between forward and reverse proxy is to look at the requirements of the app that you are developing.

Reverse proxy can be useful in the development of a solution to serve web applications on the internet. They serve as your web servers for all interactions with the internet.

Forward proxy applications can be useful when they are used in front of clients for personal use or in a work setting. They represent your client's internet traffic, for any interaction on the internet.

Utilizing case-based differentiation instead of focusing on the common naming conventions can aid in avoiding confusion.

Conclusion

In this article, we clarified the meaning of a proxy and the two main types of them being the forward and the reverse proxy. Practical applications as well as a look at the beneficial traits were used to define forward proxies and reverse proxies. If you're interested in knowing more about implementation of proxies take a look at our tutorial on how to set up Nginx as an internet server and reverse proxy for Apache on an Ubuntu 20.04 server.

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