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It is a proxy is sometimes referred to as an application for a proxy server that serves as an intermediary between a server and a client via the internet. Without a proxy, a user would be able to make a request for a source directly through a server, and the server would then deliver the resource directly back to the client. This is not difficult to grasp and implement however, the addition of proxy servers may provide advantages such as enhanced efficiency, privacy, security and more. As an additional pass-through layer proxy servers serve as a defender for the internet between clients and servers.




In general, the combination of server hardware and installed proxy software is often described as proxy servers. In this article, we'll concentrate on proxies commonly thought to be software, specifically in relation with web server. The article will provide a detailed discussion of the two principal kinds of proxies, which are two types: a forward proxy and a reverse proxy. Each has their own use case, but they're often misunderstood because of a similar name convention.




This article will give you an understanding of what proxies as well as their subtypes are, and their use for common setups. In this article you'll know how to recognize the situations in which you can benefit by a proxy. You'll also be able to pick the best choice between forward and reverse proxy, in each scenario.



Understanding Forward Proxies



Forward proxy often known as the open proxy is an agent used by a user who is trying to send a request via the internet to a source server. If this is the case, all requests from the client are instead directed to an forward proxy. In this situation an agent acting on behalf of the forward proxy in instead of the user will look into the request. First, it will determine whether the client is able to make requests via this particular forward proxy. It then decides whether to reject any request or forward it to the original server. The client does not have a direct connection to the internet. it only has access to what the forward proxy allows it access to.




The primary reason for people to utilize forward proxy is to increase privacy or security online. Forward proxy makes use of an internet connection as a client, and in this process, it uses an alternative IP address to the IP address of your client.




Depending on how it's been set up in the past forward proxy servers could provide a variety of functions that allow you to:




Beware of ad-tracker.


Circumvent surveillance.


Find limitations based on your location.




Forward proxies are also used in systems for centralized security and access based on permissions for instance in workplaces. If all internet traffic is routed by an open forward proxy system, admins may restrict access to only certain clients to the internet via an common firewall. Instead of establishing firewalls for the client layer, which could involve many machines with varying settings as well as users, firewalls could be installed at the proxy layer that forwards.




Remember to set forward proxy preferences have to be manually setup prior to their use to use them and reverse proxy settings can't be noticed by the user. Based on the type of IP address of the user's IP address, the server from which it originated by the forward proxy privacy and anonymity could be granted, or left unnoticed.




There are numerous options to investigate for forward proxy options:




Apache The Apache is a popular open-source web server with forward proxy functions.


Nginx: Another well-known open source server for web hosting that has forward proxy features.


Squid is an open-source forward proxy that uses the HTTP protocol. It's not the complete web server system. It is possible to refer to our tutorial on how to create a Squid proxy to connect privately on Ubuntu 20.04.


Dante forward proxy which runs on the SOCKS protocol rather than HTTP this makes it better to be used in situations like peer-to-peer traffic. It is also possible to look into how to set up the Dante proxy to permit private connections on Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy acts as an intermediary between the web server, and takes the care of requests coming in from clients on behalf of. This server could function as a single server, or a number of servers. In addition, it could be an application-server, such as Gunicorn. In any of these scenarios the request will be made by a client via the internet as a whole. The request would typically be directed directly to a web server which has all the information the user is wants. Reverse proxy acts as an intermediary, shielding the webserver from direct communication with the internet.




From the perspective of the client's view of the user, using reverse proxy isn't different from communicating with the server in its own. It's basically similar, but the user cannot discern the difference. Client requests a resource and then receives it without any extra configuration needed by the client.




Reverse proxy providers provide features like:




The web server is protected centrally.


Incoming traffic is directed based upon rules you can set up.


The caching function is now available to users.




While centralized security is an advantage of both reverse and forward proxy systems, reverse proxy providers can provide this feature only to this web server layer not the layer that clients use. Instead of having firewalls on Web server layers, which could include many servers and different configurations, the bulk of firewall security is concentrated at the reverse proxy layer. Furthermore, removing of the burden of interacting with firewalls as well as interfacing with clients' requests that are not on web servers allows firewalls to concentrate on providing the necessary resources.




If there are multiple servers operating in reverse proxy The reverse proxy takes care of the method by which requests are routed to which server. A number of web servers could be running on the same server, each providing different kinds of resources or a mix 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 configure reverse proxy servers to send customers to certain servers based on the kind of resource they are looking for or to follow specific guidelines for the amount of traffic.




Reverse proxies can benefit from being placed on top of web servers through the capability of caching. The large static files can be set up with caching rules in order to avoid hitting web servers with each request. Certain options allow users to serve static assets without connecting with the server at all. Additionally the reverse proxy could be able to compress these assets.




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



Differentiating Forward and reverse proxy Use Distinguishing Forward and Reverse Proxy Use



Because "forward" in addition to "reverse" are associated with a sense of directionality, and false comparisons to "incoming" and "outgoing" traffic These labels are prone to confusion since both types of proxy process requests and responses. In addition, the most effective method to differentiate between reverse and forward proxy is to look at the requirements of the app that you're developing.




Reverse proxy is a useful tool to use when designing a solution to deliver web-based applications over the internet. They act as your web servers whenever you interact on the internet.




Forward proxy is a great tool to display clients for personal use or in a work environment. They are a representation of information about the client whenever you interact on the internet.




Separating by use case rather than focusing on the similar name conventions will ensure you don't get confused.



Conclusion



This article explains what a proxy is and compares the two major types, namely the forward proxy and reverse proxy. Practical examples of usage as well as a discussion of the most advantageous characteristics were used to define the distinction between forward and reverse proxy. If you're interested in exploring the possibilities of proxy servers, you must check out our guide on how to configure Nginx as reverse proxy to Apache on an Ubuntu 20.04 server.



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