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It's an proxy, also called a proxy server. It's a software which acts to act as an intermediary for a server and a client over the internet. In the absence of a proxy server, a customer could send a request to an entity directly through a server and the server would provide an item directly to the user. Although this method is simple to comprehend and implement using proxies, it can offer advantages in terms of better performance as well as privacy, security and many more. In addition, a pass-through proxy is an extra security layer on the internet between clients and servers.




The general entire set of server hardware along with installed proxy software is often called proxy servers. This article will focus on proxy servers which are usually classified as software and in the context of web servers. This article will present a detailed breakdown of the two types of proxies: forward proxy and reverse proxy. reverse proxy. Each kind has its own specific usage instance, but they often get confused due to the same namesake convention.




This article will provide you with details about the types of proxies and what subtypes they are, and how they work in the most common configurations. In this article you will be able identify circumstances in which you may make use of a proxy and select the right solution between reverse proxy and forward proxy for every situation.



Understanding Forward Proxies



The forward proxy also known in the form of the open proxy serves as an agent for a user who would like to transmit a request over the internet to an origin server. In this scenario it is the case that all requests made by the client would rather be directed via the forward proxy. A forward proxy acting in place of the client, will scrutinize the request. First, it must determine if the client is permitted to send requests via this specific forward proxy. Then it can either reject requests or redirect it back to the original server. The client doesn't get direct internet access. It can only reach what the forward proxy allows for it to reach.




One of the most frequent uses for forward proxies is to gain increased privacy or anonymity on internet. A forward proxy makes use of the internet as a client. In this manner, it may utilize an alternate IP address to the client's original IP address.




Depending on how it has been set up depending on how it is configured, forward proxy may offer a number of choices and permit you to:




Do not click on ads that track you.


Circumvent surveillance.


You can identify restrictions based on your geographical place of residence.




Forward proxies also are used in systems that offer central security and access via permissions, such as in workplaces. When all internet traffic goes through a standard forward proxy, a manager could permit only a few clients connection to the web which is filtered by a common firewall. Instead of keeping firewalls for the client layer which can include multiple machines with different configurations and users the firewall can be placed on the layer that forwards proxy traffic.




Be aware that forward proxy servers must be set up manually to use them, while reverse proxy servers might not be detected by the client. Depending on the type of IP address the customer, if it is relayed back to the origin server via forward proxy privacy and anonymity can be granted, or left unnoticed.




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




Apache A well-known, open-source web server with forward proxy capabilities.


Nginx is another well-known open source web server with the ability to forward-proxy.


Squid is a free forward proxy that utilizes an HTTP protocol. Squid doesn't provide the complete Web server. We recommend that you follow our step-by-step guide to set up Squid proxy for private connections on Ubuntu 20.04.


Dante Forward Proxy that uses the SOCKS protocol rather than HTTP which allows it to be more appropriate for use cases like peer-to-peer. It is also possible to learn how to set up a Dante proxy for private connections on Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy functions as a representative of a web server, handling incoming requests from clients on behalf of. The web server could include a server or multiple servers. Additionally, it can serve in the role of an application server, such as Gunicorn. In any case, the request will be received via the internet at large. In the majority of cases the request will be sent directly to the web server, containing the information that the client is in need of. A reverse proxy acts as an intermediary and is able to block it from direct interaction with the internet's open.




From the viewpoint of the client the experience of interacting with reverse proxy is not different than interacting with a web server directly. It's the same thing, and the client cannot discern the distinction. The client makes a request for the resource, and then gets it, with no extra configuration needed on the part of the client.




Reverse proxy providers provide features like:




The web server is protected centrally.


Sending traffic to be directed in accordance with rules you define.


Additional functions for caching.




While central security is a benefit of both forward and reverse proxy service, reverse proxy providers provide this benefit to Web server layers, but not to the layer that clients use. instead of maintaining firewalls on the layer of web servers, which could contain multiple servers that have different configurations, the majority of firewall security is centered at the layer of reverse proxy. Additionally eliminating the responsibility of communicating with firewalls as well as communicating requests from clients that are not connected to web servers allows them to concentrate on delivering the needs of their clients.




If there are multiple servers running in a reverse proxy the reverse proxy is also accountable to control which requests are routed through which server. Multiple web servers might be serving the same content, offering various kinds of resources or a mixture of both. They may use the HTTP protocol similarly to traditional web servers but also incorporate application server protocols like FastCGI. It is possible to configure reverse proxy services that redirects clients to particular servers in accordance with the resource requested, or to adhere to certain rules for traffic load.




Reverse proxies may also profit from their placement prior to web servers, providing caching functions. The large static file can be set up using caching rules to prevent having to contact web servers on every request. There are even options allowing you to directly serve static content without touching the web server in any way. Furthermore, the reverse proxy can handle the compression of these files.




The well-known Nginx web server also functions as an extremely popular reverse proxy option. While Apache is also a reverse proxy service however, the Apache web server comes with an reverse proxy which adds a feature to Apache However, Nginx was originally designed to and focuses specifically on its reverse proxy feature.



Differentiating Forward Proxy from Reverse Proxy Examples



Since "forward" as well as "reverse" are both associated with an impression of directionality and can lead to misleading comparisons with "incoming" and "outgoing" traffic These labels could be confusing because both types of proxy handle requests and responses. Instead, a better way to differentiate between forward and reverse proxy is to look at the requirements of the app you're building.




Reverse proxy is a useful tool in the development of an option to provide web-based services via the internet. They act as your web server when you connect to the internet.




Forward proxy applications are beneficial for displaying clients for personal use, or in a corporate setting. They serve as the proxy for your client for any interaction on the internet.




The practice of separating by use case, instead of focussing on the commonly used naming conventions can make it simpler for people to stay clear of confusion.



Conclusion



This article describes what a proxy is along with two kinds, which are the forward proxy as well as the reverse proxy. Practical applications as well as a brief overview of the most beneficial features were used to distinguish 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 reverse proxy and internet server in Apache running an Ubuntu 20.04 server.



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