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It is a proxy or proxy server, is software that acts as an intermediary between a client and server over the internet. In the absence of a proxy server, a user can send a request to an item directly to a server and the server would then provide the requested resource directly to the client. Although this method is simple to understand and implement with proxies, it can provide advantages in terms of more performance and privacy, security and more. As an additional pass-through layer proxy is an extra security layer on the internet between clients and servers.

In general, the entire set of server hardware along with installed proxy software is frequently called proxy servers. This article will concentrate on proxy servers that are typically described as software, and when referring to web servers. This article will give a detailed breakdown of the two main types: a forward proxy and a reverse proxy. reverse proxy. Each type has its own unique usage instance, but they're often confused because of the identical namesake convention.

This article will give you information about what proxies are and what subtypes they are, and how they work in the common configurations. In this article, you'll be able identify circumstances in which you may 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 as the open proxy serves as an agent for a user who would like to transmit a request over the internet to an original server. In this scenario it is the situation that all requests sent by the client should be directed via the forward proxy. A forward proxy, acting in instead of the customer, will scrutinize the request. The first step is to decide if the client is allowed to send requests via this specific forward proxy. Then it can either reject requests or redirect it back to the server that originally sent it. The client doesn't get direct internet access. It is only able to connect to what forward proxy permits it to connect to.

One of the most common uses for forward proxies is to improve privacy or security on the internet. A forward proxy makes use of the internet as a client. In this way, it can 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 can offer a number of options and allow you to:

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  Beware of tracking ads.
  
  
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  Circumvent surveillance.
  
  
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  You can determine restrictions based on your geographical location.
  
  

Forward proxies also are used in systems that offer central security and access via permissions, like in a workplace. If all internet traffic flows through a standard forward proxy, an administrator can allow only a handful of clients connection to the web that is blocked by a standard firewall. Instead of putting firewalls for the client layer which may include multiple devices with different configurations and users the firewall can be placed on the layer that forwards proxy traffic.

Be aware that forward proxy servers require manual setup to be used, while reverse proxies might not be detected by the client. Depending on the kind of IP address a customer is relayed to the origin server through forward proxy, privacy and anonymity could be granted or left unnoticed.

There are a myriad of options to explore to find forward proxy alternatives

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  Apache An open-source, well-known web server with forward proxy capabilities.
  
  
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  Nginx is another popular open-source web server that has forward proxy capabilities.
  
  
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  Squid is an open source forward proxy that utilizes an HTTP protocol. Squid doesn't provide the complete web server service. It is possible to refer to our step-by-step guide to set up Squid proxy for private connections in Ubuntu 20.04.
  
  
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  Dante Forward Proxy that uses the SOCKS protocol instead of HTTP which is more suitable for applications such as peer-to-peer. It is also possible to learn how to set up an Dante proxy to connect private connections on Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy serves as a representative for a web server that handles any requests that come in from clients for. This server can be a single server, or multiple servers. It could also function for application servers such as Gunicorn. In any case, the request will be received from a client through the internet at large. Most of the time, the request will go directly to the web server with the information the client is in need of. A reverse proxy acts as an intermediary and separates it from direct interactions 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 the resource, and is then granted access, with no extra configuration required from the client.

Reverse proxy providers provide features like:

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  The web server is protected centrally.
  
  
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  The sending of traffic according to rules that you decide to define.
  
  
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  Additional functions for caching.
  
  

While central security is a benefit of both reverse and forward proxy services, reverse proxy provides this benefit only to Web server layers, but not to the layer of clients. Instead of implementing firewalls on the web server layer, which could contain multiple servers with various configurations, the majority of firewall security is concentrated on the layer of reverse proxy. Furthermore, getting rid of the hassle of dealing with firewalls and communicating with requests from clients away from web servers lets them concentrate solely on providing resources.

In the case of multiple servers that are through a reverse proxy, the reverse proxy is also accountable for controlling which requests go via which server. Multiple web servers could be hosting the same resources, offering various kinds of resources or a mixture of both. They can utilize the HTTP protocol similarly to a traditional web server but they could include other protocols for application servers like FastCGI. There is the possibility to set up reverse proxy services to redirect clients to specific servers in accordance with the requested resource or to abide by certain rules for traffic load.

Reverse proxies also gain by their position before web servers, by providing caching functions. Large static files can be configured with caching rules to avoid having to call web servers on every request. There are even solutions allowing users to serve static files directly without contacting the web server for any reason. In addition, the reverse proxy can manage compression of these assets.

The popular Nginx web server functions as an extremely popular reverse proxy service. While Apache can also be a reverse proxy solution, the Apache web server also comes with an reverse proxy which is an additional function for Apache but Nginx was originally designed to and focuses exclusively on reverse proxy feature.

Differentiating Forward Proxy from Reverse Proxy Examples

Since "forward" and "reverse" are both associated with the perception of directionality, and are misinterpreted as comparing "incoming" as well as "outgoing" traffic and vice versa, these labels are often confusing since both kinds of proxies respond to requests and other responses. Instead, a better way to differentiate between reverse and forward proxy services is to study the requirements of the application you're creating.

Reverse proxy is an important tool for the creation of an option to provide web-based services via the internet. They act as your web server whenever you interact using the internet.

Forward proxy apps are useful to display clients for personal use, or in a professional setting. They serve as the proxy for your client for all communications via the internet.

The practice of segregating by use case instead of focussing on the standard naming conventions makes it easier to avoid confusion.

Conclusion

This article explains what a proxy is along with the two types, specifically, the forward proxy and the reverse proxy. Practical applications and a review of the beneficial features were utilized to differentiate forward proxies from reverse. If you'd like to explore the possibilities of proxies then read our guide on how to configure Nginx as an reverse proxy and internet server in Apache running the Ubuntu 20.04 server.

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