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It is an proxy is also known as proxy server software that sits in the middle between server and a client on the internet. Without the use of a proxy, users will send a request for a resource directly to a server and it would then serve that resource to its user directly. This is a simple method to comprehend and implement, using proxies provides advantages in the form of more performance and privacy, security and many more. In addition to being able to pass through, a proxy serves as a guardian for the internet between clients and servers.




There is a general consensus that the combination of server hardware and installed proxy software is frequently referred too as proxy servers. For this post, we'll concentrate on proxies that are typically described in terms of software as and those used to work in conjunction using web servers. This article will give an in-depth description of two types of proxy: that is one that is a forward proxy and reverse proxy. reverse proxy. Each comes with its own specific use case, often confused because of the same name convention.




This article will give you some knowledge about what proxy services are, and their subtypes, and the ways in which they can be beneficial in common configurations. Through this article, you'll be able to identify the circumstances in which a proxy is advantageous, and choose the best forward proxy or reverse proxy for any particular situation.



Understanding Forward Proxies



The forward proxy sometimes known as the open proxy is the agent of a user who is trying to send an internet request to an source server. In this scenario, it's the scenario that all requests made by the client will rather be directed to this forward proxy. In this scenario the forward proxy, in lieu of the client will examine the request. It will first will determine if the client is permitted to transmit requests through this particular forward proxy. It will then decide whether to reject the request or transfer it over to the original server. It's not able direct connection with the web. It is only able to access the information the forward proxy permits it to access.




A typical use of forward proxy is to achieve more privacy or security online. Forward proxy utilizes the internet as a personal client, and during this manner, it may utilize a different IP address in contrast to the IP address that is used by the client.




Depending on how they were configured in the past, forward proxy servers can offer a wide range of options, allowing you to:




Stay clear of tracking ads.


Circumvent surveillance.


Determine restrictions based on where you live.




Forward proxies are also used in systems that offer central security as well as permission-based access, such as in a workplace. In the event that all internet traffic passes via an open forward proxy, an administrator can grant only a small number of clients access to the internet, which is then filtered by a common firewall. Instead of establishing firewalls on the layer of clients, which can include multiple machines with different user and environment the firewall could be installed at the layer which is responsible for forwarding proxy data.




Be aware that forward proxies need to be set up manually prior to use, whereas reverse proxy are often disregarded by clients. Based on the fact that clients' IP addresses are passed on to the server that originated it via the forward proxy Privacy and anonymity could be made transparent.




There are many options to be considered when it comes to forward proxy options:




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


Nginx: Another renowned open-source web server that has forward proxy features.


Squid is an open source forward proxy that uses the HTTP protocol. It doesn't provide the entire web server service. Check out our guide on the best way to setup Squid proxy to allow secure connections on Ubuntu 20.04.


Dante forward proxy which uses the SOCKS protocol instead of HTTP and HTTP, which makes it more suitable for scenarios like peer-to-peer communication. You might also want to check out how to setup a Dante proxy for private connections within Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy is a representative of a web server that manages requests from customers on its behalf. Web servers can represent one or more servers. Furthermore, it could serve as an app server, like Gunicorn. Any of the above situations a request could come in via a user on the internet at large. In most cases the request will be sent directly to the web server, along with the information the user wants. A reverse proxy acts as an intermediary and isolates your server from interactions with the internet.




From the perspective of a customer from a user's point of view reverse proxy is not different from communicating with the webserver in direct communication. It's the same thing, and the client is unable to discern the difference. The client requests a resource and then receives it, with no additional configuration needed for the user.




Reverse proxy proxies are able to provide options, such as:




Centrally secured for Web Server Layer.


The sending of traffic according to rules that you can establish.


Additional functions for caching.




While central security is an advantage of both reverse and forward proxy services, reverse proxies give this benefit only to the server layer and not to the layer that connects to the client. Instead of maintaining firewalls at the web server layer that may contain multiple servers with different configurations, the majority of firewall security is centered in the reverse proxy layer. Additionally, getting rid of the necessity of interacting with firewalls and connecting with requests from clients far from web servers allows the firewall to concentrate on serving the needs of their clients.




If there are multiple servers behind a reverse proxy, the reverse proxy also takes care of the way requests are handled to the server. Multiple web servers may be running from the exact same computer, serving various kinds of resources or a combination of both. These servers can use the HTTP protocol to function as a standard web server. They can also use protocols for applications such as FastCGI. It is possible to set up reverse proxy servers to send clients to specific servers based on the kind of resource they are looking for, or to adhere to certain rules for traffic load.




Reverse proxies can also benefit from their positioning before web servers by delivering the ability to cache. Large static assets can be set up with caching policies to avoid hitting web servers on each request, with certain solutions providing the option to serve static files directly without having to connect to the internet server for even one time. Additionally reverse proxy is able to manage the compression of these assets.




The well-known Nginx web server is also known as a reverse proxy provider. You can also use Nginx, the Apache web server, it is equipped with a reverse proxy function it's an additional feature available only for Apache while Nginx was initially developed for and focused on reverse proxy functionality.



Distinguishing Forward and Reverse Proxy Use Differentiating Forward Proxy and Reverse Proxy Use



Because "forward" as well as "reverse" have connotations of directionality and false distinctions between "incoming" in addition to "outgoing" traffic These labels can be confusing as both kinds of proxy can be used to respond to requests as well as responses. The best way to differentiate between reverse and forward proxy services is to study the specifications of the application you're developing.




Reverse proxy is useful in the creation of a method to offer web-based services over the internet. They function as servers when you interact with the internet.




Forward proxy can be helpful when you are by the client for your personal use or in a work environment. They represent your client traffic whenever you use the internet.




A distinction that is based on the use cases instead of focusing exclusively upon similar conventions for naming can help you avoid confusion.



Conclusion



This article explains the definition of a proxy that includes two main kinds that are forward proxy and reverse proxy. Practical scenarios for application and a look at useful features were used to distinguish between forward proxy and reverse proxies. If you're interested in exploring the possibilities of proxies, then check out our tutorial on how you can configure Nginx as a reverse and web server proxy for Apache on one Ubuntu 20.04 server.



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