"proxy" is a term used to describe a server "proxy" is a reference to a proxy or proxy server. It is a software that sits as an intermediary between a server and client via the internet. Without the proxy, a client would send a request for any service straight to the server, and it would then serve the resource directly back towards the customer. This is not difficult to understand and implement, using proxies can provide benefits that include improved security, performance, privacy, and much more. As a pass-through layer proxies act as a gatekeeper on the internet between clients and servers.

It is generally accepted that the set of server hardware along with proxy software installed is commonly referred to as proxy servers. This article will concentrate on proxy servers that are typically described in terms of software and those that are used together with web servers. This article will give an explanation of the two main types of proxy servers, specifically forward proxy and reverse proxy. forward proxy and reverse proxy. reverse proxy. Each kind has its own terminology, which can be confusing due to the use of overlapping terms.

This article will give you an idea of the what proxies as well as their subtypes are and also their significance in normal configurations. If you go through this article, you will be able recognize scenarios in which a reliable proxy could be beneficial, and determine the most appropriate option between reverse proxy and forward proxy for any situation.

Understanding Forward Proxies

Also forward proxy, also referred to as open proxy open proxy is an agent for the user trying to send the request online an origin server. In this case, any request made by the client will rather be sent through the forward proxy. In this scenario the forward proxy, acting on behalf of the client will examine the request. At the beginning, it will decide whether it is allowed to send requests via this particular forward proxy. Then, it can either refuse requests or redirect it to its source server. The client does not have direct connection to the internet and has access to only what the forward proxy allows it to connect to.

The most common reason to utilize forward proxies is for more privacy or security online. A forward proxy uses the internet on behalf of the individual client. And when it does this, it may utilize an IP address different from the IP of the client.

Based on the way it's configured the forward proxy may offer a range of features and the ability to:

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  Beware of ad-tracker.
  
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  Circumvent surveillance.
  
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  You will be able to identify any restrictions based upon your location.
  
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Forward proxies also are employed in systems to offer central security, as well as access based on permissions, such as in the workplace. If all internet traffic flows through the common forward proxy layer, admins may permit only a few clients online access that is blocked by a common firewall. Instead of maintaining firewalls for clients, that may be used by multiple computers that have different configurations, environments the firewall can be put in this forward proxy layer.

Be aware the fact that forward proxy servers have to be manually setup before they are able to be used while reverse proxy servers could be ignored by clients. Based on the fact that the IP address of the client has been transferred to the server that is being used by the forward proxy, privacy and anonymity could be granted or kept in the dark.

There are a variety of choices to consider for forward proxies.

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  Apache The Apache is a well-known open source web server that offers forward proxy capabilities.
  
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  Nginx: Another renowned open-source webserver that comes with forward proxy capability.
  
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  Squid is an open-source forward proxy utilizing the HTTP protocol. This doesn't offer the complete web-based server. Check out our guide on the most efficient way to install Squid proxy for private connections on Ubuntu 20.04.
  
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  Dante forward proxy, which uses the SOCKS protocol instead of HTTP this makes it better to handle situations like peer-to-peer traffic. You can also research how to set up Dante proxy to allow connection to private networks in Ubuntu 20.04
  
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Understanding Reverse Proxies

A reverse proxy functions in the capacity of an agent on a server that takes care of incoming requests from clients on behalf of the server. The web server may function as a single server or multiple servers. Additionally, it can contain an application server such as Gunicorn. In any of these situations, the request might be made by a user of the internet at large. In most cases, the request will be sent directly to the server on the internet that has the information the client is asking for. A reverse proxy is a intermediary that isolates the web server from direct contact with the open internet.

From the point of view of the user, working with reverse proxy isn't different from interacting via direct connection to an internet server. It's the same thing but the client can't discern the distinction. The client makes a request for an item and receives it, without any additional configuration needed from the user.

Reverse proxy providers provide features like:

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  Centralized security to web server.
  
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  The direction of traffic coming in is based upon rules that you can set up.
  
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  Additional functions to cache data.
  
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Although central security is an advantage of both reverse and forward proxies, reverse proxies provide this benefit to the layer on the webserver and not to the client layer. In lieu of maintaining firewalls on the server level which may include multiple servers with various configurations, the bulk of firewall security could be concentrated on the reverse proxy layer. Furthermore, taking the burden of dealing with firewalls and coordinating requests from clients off web servers allows the firewall to focus on supplying services.

If there are multiple servers running through a reverse proxy, the reverse proxy can be also responsible for directing what requests go towards which servers. Multiple web servers might be operating within the same system, each serving various kinds of resources or a mixture of both. These servers utilize the HTTP protocol to serve as a standard web server. However, they can be equipped with application server protocols like FastCGI. You can create reverse proxy that directs the clients to specific servers in accordance with the requested resource or to comply with certain rules regarding the traffic load.

Reverse proxies can also be able to make use of their positioning prior to web servers using caching capabilities. The large static files can be set up using caching rules to avoid hitting web servers every request. Certain solutions that allow you to serve static content without having to connect to the website server at all. Furthermore the reverse proxy is capable of handling compression of these assets.

The well-known Nginx web server also functions as a powerful reverse proxy service. Although Apache is also an alternative to reverse proxy however, the Apache webserver also comes with reverse proxy functions, which can be a second option for Apache while Nginx was initially designed for and focuses on the reverse proxy features.

Differentiating Forward Proxy and Reverse Proxy Use Situations

Because "forward" as well as "reverse" are associated with a sense of directionality, and false comparisons to "incoming" and "outgoing" traffic, the labels can be confusing since both types of proxy can manage requests as well as respond. The best method to differentiate between reverse and forward proxy services is to think about the needs of the application that you are developing.

A reverse proxy could be beneficial when you're developing an application that can serve web applications on the internet. They serve as your web servers in any interactions through the Internet.

Forward proxy can be useful when it is used before clients for personal use, or even in a business setting. They act as a representative of your customers in any interactions on the internet.

A case-based distinction instead of focusing on the similar naming conventions will assist you in avoidance of confusion.

Conclusion

This article explains what is a "proxy" is, with two main types being the reverse proxy and forward proxy. Practical scenarios for its use and a look at useful features were utilized to differentiate the two types of proxies that are reverse and forward. If you're looking for ways to set up proxies, look up our guide on how to configure Nginx as an HTTP server and reverse proxy on Apache on an Ubuntu 20.04 Server.

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