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It is a proxy is also known as a proxy server software program that serves in the role of an intermediary two parties: a server and a user via the internet. Without the proxy, a client can send a request to a source directly through a server, and the server would deliver the resource directly back to the client. Although this is a simple process to grasp and implement however the addition of proxy servers may provide benefits in terms of improved efficiency, privacy, security, and so on. As an additional pass-through layer proxy servers act as a guardian for the internet between clients and servers.




In general the case of server hardware and installed proxy software is also often described as proxy servers. This article we will focus on proxies typically considered to be software, specifically with regard to web servers. The article will provide a detailed discussion of the two main types of proxies: a forward proxy and reverse proxy. reverse proxy. Each has their own use case, but they are often confused because of a similar name convention.




This article will provide you with some understanding about what proxies as well as their subtypes are, and the ways they can be useful for common setups. In this article, you'll learn how to discern the scenarios that you can gain from a proxy and then choose the best option in between reverse and forward proxy in each situation.



Understanding Forward Proxies



Forward proxy also called open proxy, also known as open proxy is an agent used by a user who is trying to make a request through the internet to an original server. In this scenario, any requests made by the client are instead directed through the forward proxy. In this situation, the forward proxy acting in in the place of the customer will look into the request. It is the first thing to check if the client is able to send requests through this particular forward proxy. It then decides whether to reject any request, or redirect it to the original server. The client has no directly connected to the web; it is only able to access the information the forward proxy grants it access to.




The primary reason for people to use forward proxy is for greater privacy or protection online. Forward proxy makes use of web services as clients as such it assigns an alternative IP address in addition to your client's IP address.




Depending on how it's been set up in the past forward proxy servers could offer a range of features that allow you to:




Avoid ad tracking.


Circumvent surveillance.


Find limitations based on your location.




Forward proxies may also be used in systems for centralized security and permission-based access for instance in workplaces. In the event that all internet traffic is routed through an open forward proxy layer, administrators can permit only a few clients access to the internet through a common firewall. Instead of maintaining firewalls for the client layer, which could include multiple machines with different settings as well as users, firewalls may be added to the forward proxy layer.




Keep in mind that forward proxy settings have to be manually set up before they are able to be used for use and reverse proxy servers are not able to be noticed by the user. Depending on the type of IP address the user, it is relayed to the server where it originated through the forward proxy, privacy and anonymity may be granted, or to go unnoticed.




There are numerous options to look into for forward-looking proxy services:




Apache The Apache is a well-known open-source web server that offers forward proxy capabilities.


Nginx: Another well-known open source server for hosting websites with forward proxy features.


Squid: An open-source forward proxy that uses the HTTP protocol. It's not a complete webserver system. We recommend you to read our guide on how you can create Squid proxy to connect privately in Ubuntu 20.04.


Dante forward proxy which runs the SOCKS protocol rather than HTTP which makes it more suited for scenarios such as peer-to-peer communication. You can also look into how to set up a Dante proxy to allow private connections to Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy acts as an intermediary between a web server and it takes responsibility for incoming requests from customers on behalf of. This web server may serve as a one server or a number of servers. It could also be an application-server like Gunicorn. In either of these scenarios, a request would come from a customer via the internet in general. Typically, the request will be directly sent to the webserver that has all the resources the client seeking. A reverse proxy is a intermediary, shielding the webserver from direct contact with the internet.




From the point of view of a user's viewpoint from the perspective of a client reverse proxy isn't different from communicating with the server on its own. It's basically identical, however the client cannot tell the difference. The client requests a resource, and gets it, without additional configuration required from the client.




Reverse proxy providers provide features like:




The web server is protected centrally.


The direction of traffic coming in is by rules that you create.


The caching functionality was added to the application.




While centralized security is an advantage of both forward and reverse proxy systems, reverse proxy providers apply offer this feature only to the level of an internet server, and not the layer that clients use. instead of maintaining firewalls at Web server layers, which could include many servers and different configurations, the majority of firewall security can be concentrated at the reverse proxy layer. Furthermore, removing of the responsibility of interacting with firewalls and interacting with requests from clients outside of web servers allows firewalls to focus on providing resources.




If there are multiple servers operating in reverse proxy and the reverse proxy determines the way requests are routed to which server. There are many web servers operating on the same server, each providing different kinds of resources or a combination of both. They use the HTTP protocol just like a standard web server, however they could also incorporate application server protocols such as FastCGI. You can set up reverse proxy to direct customers to certain servers based on the kind of resource they are looking for or to adhere to specific guidelines for the amount of traffic.




Reverse proxies can benefit from their position above web servers due to the power of caching. Large static assets can be arranged with caching rules to avoid hitting web servers with each request. Certain options allow users to serve static assets, without connecting directly to web servers at all. Additionally the reverse proxy is able to handle compressing these assets.




The well-known Nginx web server also functions as a popular reverse proxy solution. It is real that Apache webserver is also equipped with reverse proxy function, it's a feature that is available for Apache but Nginx was originally designed for and is focused on reverse proxy features.



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



Since "forward" along with "reverse" come with connotations of directionality, and false comparisons to "incoming" or "outgoing" traffic The labels could be confusing because both kinds of proxy respond to requests and receive responses. In addition, the most effective method to distinguish between forward and reverse proxy is to study the requirements of the application that you're working on.




Reverse proxy can be a valuable tool when you are creating a solution for serving web-based applications over the internet. They act as your web servers whenever you interact on the web.




Forward proxy can be useful for showing clients to show to use for personal purposes, or in a working environment. They represent the client's information whenever you interact on the internet.




The practice of separating by use case instead of using the same naming conventions will ensure that you aren't confused.



Conclusion



This article explains the definition of a proxy with the two major types that are reverse proxy and forward proxy. Practical examples of usage as well as a discussion of the most useful characteristics were used to define between reverse and forward proxies. If you're looking to explore the possibilities of proxies then you should check out our guide on how to set up Nginx as a reverse proxy to Apache on an Ubuntu 20.04 server.



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