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An proxy can also be referred to by the name of a proxy. is software that functions as an intermediary between a client and server over the internet. Without the proxy, a customer would send a request for any resource directly to the server, and servers would deliver direct to users who requested the resource. Although this method is easy to understand and use, however the addition of proxy servers can offer advantages such as more performance, privacy and security, among others. As an additional layer of pass-through proxy servers function as a security guard for the internet between servers and clients.

The general consensus is that the system of servers that are equipped with proxy software is often referred as proxy servers. This article will concentrate on proxies traditionally defined as software, and specifically in relation to servers on the internet. We will present a summary of the two major types of proxy which are forward proxy and reverse proxy. reverse proxy. Each kind has a distinct use, which could be confusing due to the same namestamp.

This article will provide you with an understanding of types of proxies, their subtypes, and what they can do for common setups. By reading this article you'll be able know the scenarios where you may benefit by a proxy and decide on the appropriate alternative between reverse proxy or forward proxy depending on the circumstance.

Understanding Forward Proxies

Forward proxy sometimes called an open proxy serves as an agent for the user who wishes to transmit a request through the internet to a source server. In this instance, any attempt to send requests made by the client will rather be directed via the forward proxy. A forward proxy that is in instead of the user will look into the request. It first decides if the client is allowed to accept requests via this particular forward proxy. Then, it can either refuse any request, or redirect it to the server that originated it. The client is not allowed direct access to the internet; it can only be able to access the information that forward proxy grants the access.

A very frequent uses for forward proxies is greater security or privacy on the internet. A forward proxy is able to access the internet in lieu of a specific client and during that process it could use an alternative IP address, in contrast to the IP address used by the client.

Depending on how it's been configured depending on how it's set up forward proxy can 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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  Establish restrictions based upon location.
  
  

Forward proxies are also employed in systems to offer central security as well as permission-based access, such as in workplaces. In the event that all internet traffic flows through an open forward proxy layer, administrators are able to restrict access to only certain clients to the internet. The web is filtered by an common firewall. Instead of having firewalls for the client layer which may comprise a variety of machines with various configurations and users, a firewall may be placed the front proxy layer.

Be aware that forward proxies should be manually set up to use, while reverse proxy servers could be disregarded in the eyes of the user. Depending on the kind of IP address the client's connection to the server that generated it by the forward proxy privacy and security may be granted or made more transparent.

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

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  Apache is a well-known open source web server that offers forward proxy capability.
  
  
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  Nginx is a popular open-source webserver that includes forward proxy capabilities.
  
  
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  Squid is an open source forward proxy that makes use of an HTTP protocol. This option doesn't include the entire web server. We recommend you read our guide on the best method for installing Squid proxy to allow private connections on Ubuntu 20.04.
  
  
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  Dante is a forward proxy which uses the SOCKS protocol instead of HTTP which makes it appropriate for situations such as peer-to-peer communication. It is also possible to learn how to set up the Dante proxy to allow connection to private networks in Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy is a web server that handles the requests of customers on behalf of the server. This server can serve as a single server or a number of servers. Additionally, it can include an application servers, like Gunicorn. In any of these instances the request will be made via the web at large. In the majority of cases, the request is sent directly to the server along with all the information the client in need of. A reverse proxy serves as an intermediary, segregating your web server from communication with the internet's public.

From a consumer's point viewpoint from the perspective of a client reverse proxy use is not different from connecting to an internet server direct. It's functionally identical, however the client isn't able to discern the difference. The client requests the resource, and it then gets it, with no additional configuration needed on the part of the client.

Reverse proxies provide various features, including:

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  A central layer of security that protects the server.
  
  
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  Directing incoming traffic according to rules you set up.
  
  
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  A new feature to cache has been added.
  
  

Although central security is a benefit of both forward and reverse proxy services, reverse proxy providers provide this benefit only to the server layer and it is not available to the client layer. Instead of focusing on the maintenance of firewalls at the server layer that could contain multiple servers and various configurations, the bulk of firewall security can be directed at the reverse proxy layer. In addition, eliminating the burden of communicating with firewalls as well as interacting with requests from clients not connected to web servers lets them focus solely on meeting the requirements of their clients.

If there are multiple servers hosted by a reverse proxy it also handles the routing of requests towards the servers. There could be multiple web servers operating on the same server, providing different types of resources or a mix of the two. They may use an HTTP protocol to function as a standard web server, but they could also incorporate protocols for application servers like FastCGI. You can create reverse proxy servers to direct clients to specific servers according to the requested service, or observe certain guidelines for traffic load.

Reverse proxies may also make use of their position prior to web servers by providing the ability to cache. Large static assets can be set with caching rules that prevent reaching web servers every request. There are solutions that offer the possibility of serving static content directly without having to connect with the webserver in any way. Additionally, reverse proxy can handle compressing these assets.

The renowned Nginx web server is a very popular reverse proxy option. It is true that the Apache web server is able to use the ability to reverse proxy as an additional feature that is available to Apache However, Nginx was designed originally to focus on the reverse proxy feature.

Distinguishing Forward Proxy from Reverse Proxy Examples

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

Reverse proxy is a vital feature in the development of a system to support web applications on the internet. They act as your servers whenever you connect to the Internet.

Forward proxy can be useful in displaying customer information for your own use, or in a work environment. The forward proxy is a representation of the information of the customer when you connect to the internet.

A distinction based on usage case rather than focusing only on similar naming conventions can help avoid confusion.

Conclusion

In this article, we clarified the definition of a proxy. There are two kinds of proxy being the forward and the reverse proxy. Practical applications as well as an exploration of beneficial attributes were used to identify forward proxies and reverse proxies. If you're interested exploring the use in proxy server, follow our tutorial on how you can configure Nginx as web service and reverse proxy within Apache in Ubuntu 20.04 Server. Ubuntu 20.04 server.

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