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A proxy, also known as a proxy is also known as a proxy server. is software that acts to act as an intermediary for client and server on the internet. Without the proxy, a user would be able to send a request to every resource straight to server, and servers would provide the requested resource directly to the user. This is a simple method to comprehend and use, the addition of proxy servers may provide benefits including increased performance, privacy and security, etc. As an additional layer of security proxy servers function as a gatekeeper for the internet, separating clients from servers.




The general consensus is that the hardware for servers, paired with proxy software is commonly called proxy servers. However, this article will focus on proxies traditionally defined as software, specifically in relation to servers on the internet. This article will provide a brief overview of the two main kinds of proxy: a forward proxy and a reverse proxy. Each kind has a distinct use, and can be confusing because of the identical name convention.




This article will give you an idea of the types of proxies, their subtypes are, as well as their importance in common configurations. By reading this article you'll be able recognize the situations where you could benefit from a proxy, and make the right alternative between reverse proxy or forward proxy for any scenario.



Understanding Forward Proxies



Forward proxy sometimes called the open proxy serves as an agent for users who wish to make a request over the internet to a source server. In this scenario, every request made by the client will be handled by an forward proxy. A forward proxy that is in instead of the user will look into the request. It first will determine if the client is legally authorized to accept requests from this particular forward proxy. Then, it can either refuse requests or send it back to server from which it originated. The client will not be able to have an internet connection directly. it is only able to access the information that the forward proxy allows its access.




A very frequent reasons for forward proxy is to provide greater security or privacy on the internet. A forward proxy accesses the internet in lieu of a specific client and in the process, it may use a different IP address as opposed to the IP address that is used by the client.




Depending on how it's been configured depending on how it's configured forward proxy could provide a range of features that allow you to:




Do not click on ads that track you.


Circumvent surveillance.


Determine restrictions based on location.




Forward proxies are also used in systems that provide central security and permit-based access, such as at a workplace. If all internet traffic flows through a common forward proxy layer an administrator is able to restrict access to only certain clients to the internet. This is filtered by an common firewall. Instead of having firewalls for the client layer, which could involve many machines with varying settings and types of users, the firewall can be placed on the front proxy layer.




Be aware that forward proxies should be set up manually for use while reverse proxies could be disregarded by the client. According to the kind of IP address the client's connection to the server that generated it by the forward proxy privacy and security can be made more transparent.




There are a myriad of options to take into consideration in determining forward proxy:




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


Nginx is another popular open-source webserver, which comes with forward proxy functionality.


Squid is an open forward proxy open source that uses an HTTP protocol. It does not contain the entire web server. You can refer to our article on the best method to set up Squid proxy to permit private connections in Ubuntu 20.04.


Dante is a forward proxy that uses the SOCKS protocol instead of HTTP which makes it suitable for scenarios like peer-to-peer connections. You can also check out how to set up a Dante proxy for private connections in Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy acts as the web server, which handles the requests of customers on behalf of the server. It can be used as a one server, or as a series of servers. In addition, it could contain an application server like Gunicorn. In any of these situations the request will be made via the web in general. In the majority of cases, the request is sent directly to the web server with all the resources the client in need of. A reverse proxy serves as an intermediary, segregating your web server from communication with the internet's users.




From the point of the client's point of reverse proxy isn't different from connecting directly to an internet server. It's functionally identical, however the client isn't able to discern the difference. The client makes a request for the resource and is then granted access without any additional configuration required on the part of the client.




Reverse proxies provide various features, including:




A central layer of security that protects the server.


Controlling traffic inbound using rules that you can set up.


A new feature for caching is now available.




Central security is an advantage of both forward and reverse proxy solutions, reverse proxies give this feature only to only the server layer and not the client layer. instead of maintaining firewalls at the server layer which might contain many servers with different configurations, the majority of firewall security could be concentrated on the reverse proxy layer. Furthermore, taking the burden of interacting with firewalls as well as interacting with requests from clients that are not on web servers lets them focus on only the needs of their customers.




In the event of multiple servers hosted by a reverse proxy it also manages the routing of requests towards the server that is hosting them. Multiple servers may be serving the same resource, providing different kinds of resources or a combination of both. They may use an HTTP protocol as a standard web server, but they could also incorporate applications server protocols like FastCGI. It is possible to set up reverse proxy that routes clients to particular servers based on the requested service, or follow certain guidelines for traffic load.




Reverse proxies can also make use of their position prior to web servers by providing caching capabilities. Large static assets can be managed by caching rules to avoid from reaching web servers with every time you request. There are options that provide an option to serve static content without needing to interact with the webserver at all. Additionally, reverse proxy can help compress these assets.




The well-known Nginx web server is a very popular reverse proxy option. While it is true that the Apache web server is able to use the ability to reverse proxy as an added feature for Apache but Nginx was originally designed to focus on the reverse proxy feature.



Differentiating Forward Proxy and Reverse Proxy Use Examples



Since "forward" as well as "reverse" are both associated with the perception of directionality, they can lead to misleading comparisons with "incoming" as well as "outgoing" traffic. They could be confusing because both kinds of proxy servers process requests and responses. The best way to distinguish between reverse and forward proxy servers would be to analyze the requirements of the app you're building.




Reverse proxy is a crucial feature in the development of a system to support web-based applications via the internet. They serve as servers whenever you connect to the Internet.




Forward proxy can be useful to display customers' information for your own use, or for use in a working environment. They are a way to display the information of your client every time you interact with them on the internet.




A distinction based on usage case rather than focusing only on naming conventions that are similar will make it easier to avoid confusion.



Conclusion



In this article, we clarified the meaning of a proxy. There are two types, the reverse and forward proxy. Practical applications as well as an exploration of the beneficial attributes were utilized to identify forward proxies and reverse proxies. If you're interested exploring the benefits in proxy server, learn how to configure Nginx as a web server as well as reverse proxy in Apache using the Ubuntu 20.04 Server.



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