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A proxy, also known as a proxy is also known as a proxy server, is software that acts in the role of intermediaries between client and server over the internet. If there was no proxy in place, the customer would send a request for anything directly to the server and servers would deliver the requested resource directly to the user. While this approach is straightforward to understand and use, however, the addition of proxy servers can offer advantages such as more speed, privacy and security, and so on. As an additional layer of protection proxy servers function as a guardian for the internet between clients and servers.

The consensus is that the system of hardware for servers, paired with proxy software is often referred as proxy servers. But, this article will focus on proxy servers that are typically categorized as software, and more specifically with respect to web servers. We will give a synopsis of the two major types of proxy that are a forward proxy and reverse proxy. reverse proxy. Each kind has a distinct use, which could be confusing because of the identical namestamp.

This article will provide you with an idea of types of proxies, their subtypes, and what they can do for the most common setups. After reading this article you'll know the scenarios where you may benefit by a proxy and determine the best alternative between reverse proxy or forward proxy depending on the circumstance.

Understanding Forward Proxies

Forward proxy sometimes called the open proxy serves as an agent for the user who wishes to send a request via the internet to a source server. In this case every attempt to send requests made by the client will be directed via this forward proxy. A forward proxy that is in position of the customer will look into the request. It first decides if the client is allowed to accept requests via this specific forward proxy. Then, it will either deny the request or forward it to the server from which it originated. The client is not able to have an internet connection directly; it will only be allowed access to the information that the forward proxy gives it access to.

The most frequent uses for forward proxies is to provide greater privacy or security on the internet. A forward proxy accesses the internet in lieu of an individual client, and can use another IP address as opposed to the IP address used by the client.

Based on the way it's configured, based on the way it's configured forward proxy could provide a range of features that allow you to:

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  Beware of tracking ads.
  
  
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  Circumvent surveillance.
  
  
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  Determine restrictions based on location.
  
  

Forward proxies are also employed in systems that provide central security and permit-based access, such as in workplaces. In the event that all internet traffic passes through a common forward proxy layer administrator can restrict access to only certain clients to the internet. The web is blocked by a common firewall. Instead of putting firewalls for the client layer which may involve many machines with varying configurations and users, a firewall could be placed at the proxy layer that is in front.

Keep in mind that forward proxy servers must be manually set up to use, while reverse proxy servers could be disregarded in the eyes of the user. Depending on the type of IP address of the client, it is transmitted to the server which originated it through the forward proxy, security and privacy can be granted or made transparent.

There are many choices to be considered for forward proxy:

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  Apache is a well-known open-source web server that offers forward proxy capabilities.
  
  
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  Nginx is another popular open-source webserver which has forward proxy capability.
  
  
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  Squid is an open source forward proxy that utilizes the HTTP protocol. The option does not include the entire web server. We recommend you read our guide on how for installing Squid proxy to permit private connections on Ubuntu 20.04.
  
  
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  Dante is a forward proxy that uses the SOCKS protocol instead of HTTP which makes it more suitable for scenarios like peer-to-peer connections. You can also check out how to setup the Dante proxy to allow private connections in Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy is the web server that handles the requests of customers on its behalf. The server could function as a one server, or as a series of servers. In addition, it could include an application servers, like Gunicorn. In all of these scenarios, a request would come via the web in general. In most cases the request will be sent directly to the server along with all the information the user requires. Reverse proxy acts as an intermediary, separating your server from communications with the internet's public.

From a consumer's point the client's point of reverse proxy use isn't different from connecting directly to an internet server. It's basically the same, but clients aren't aware of the difference. The client makes a request for the resource, and it then gets it without any further configuration needed by the client.

Reverse proxy providers offer options like:

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  A centralized layer of security to protect the server.
  
  
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  Directing incoming traffic using rules that you can set up.
  
  
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  A new feature for caching is now available.
  
  

While central security is a benefit of both forward and reverse proxy service, reverse proxies give this feature to the server layer, not the client layer. instead of maintaining firewalls at the server layer that could contain multiple servers and different configurations, the majority of firewall security could be concentrated on the reverse proxy layer. Additionally, removing the responsibility of dealing with firewalls as well as interacting with requests from clients outside of web servers lets them focus solely on meeting the requirements of their clients.

In the event of multiple servers being hosted through a reverse proxy, the reverse proxy also is responsible for routing requests towards which servers. Multiple servers may be serving the same resource, serving various kinds of resources, or a mixture of the two. They may utilize their HTTP protocol to function as a normal web server, however they could also incorporate application server protocols such as FastCGI. You can set up reverse proxy servers to direct clients to particular servers according to the requested resource, or to follow certain rules for traffic volume.

Reverse proxies may also utilize their position prior to web servers, by providing caching capabilities. Large static files can be set with caching rules that prevent from reaching web servers with every time you request. There are solutions that offer the possibility of serving static content directly, without having to communicate with a webserver. In addition, reverse proxy is able to handle compressing these assets.

The well-known Nginx webserver is known as a wildly popular reverse proxy choice. It is true that Apache web server does have reverse proxy capabilities, Apache web server is able to use a reverse proxy capabilities as an added feature for Apache However, Nginx was initially designed and is focused on the reverse proxy feature.

Differentiating Forward Proxy and Reverse Proxy Use Examples

Since "forward" and "reverse" are both associated with a sense of directionality and misleading comparisons with "incoming" or "outgoing" traffic and can confuse because both types of proxies handle requests and respond. Instead, a better way to distinguish between reverse and forward proxy servers would be to look at the requirements of the application you're building.

Reverse proxy is an important element in the creation of a method to run websites on the internet. They act as your servers whenever you connect to the Internet.

Forward proxy can be useful to display customers' information for your own use, or even in a workplace. The forward proxy is a representation of the information of the customer every time you interact with them on the internet.

A distinction based on usage cases instead of focusing on naming conventions that are similar will make it easier to avoid confusion.

Conclusion

This article clarified the definition of a proxy, with two kinds of proxy being the forward and the reverse proxy. Practical applications and an examination of the beneficial attributes were utilized to identify forward proxies and reverse proxy. If you're interested in the benefits in proxy server, follow our tutorial on how to configure Nginx as an internet service and reverse proxy on Apache on an Ubuntu 20.04 Server.

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