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It's an proxy or proxy server. is a software program for servers which serves as an intermediary between a clients and servers via the internet. In the absence of an intermediary the user would be able to submit a request for or resource to the server directly and the server would then serve the requested resource directly to the customer. While this procedure is easy to comprehend and implement with proxy servers, it does offer advantages such as higher performance and privacy, security and much more. As a pass-through layer, the proxy acts as a security protector of the internet between servers and clients.

In general, the mix of the server hardware and the software for proxy installation is commonly referred to as proxy servers. In this post, we'll concentrate on proxies that are typically thought of as software, and the ones used to complement web servers. You will get a breakdown of the two main types of proxies: forward proxy and reverse proxy. reverse proxy. Each kind of proxy has its own specific application scenario, which is often misunderstood because of the naming conventions that are similar.

This article will give you some understanding about what proxy servers and subtypes of them are, as well as how they can be used in most common configurations. In this article, you will be able to determine the scenarios in which an effective proxy can be useful, and select the best option between reverse and forward proxy for any particular situation.

Understanding Forward Proxies

Also forward proxy, also known as open proxy open proxy is the representative of a client that is trying to send an internet request to the server from which it originated. In this scenario the entire attempt to send requests from the client will be made by the forward-proxy. In this scenario an agent acting on behalf of the forward proxy in the place of the client will review the request. It is the first thing to establish what authorization the user has to make requests to this particular forward proxy. The forward proxy will then deny this request and send it back to the original server. The client is unable to connect directly to the internet. It will only be able to connect to what forward proxy grants its access.

One of the most frequent reasons for forward proxy is to provide greater privacy or security online. A forward proxy can be utilized to connect to the internet lieu of a client, and, in doing so, can use an alternative IP address in place of the original IP address of the client.

Depending on how they were configured in the past forward proxy servers are able to provide a variety of functions and permit you to:

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  Beware of ad-tracker.
  
  
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  Circumvent surveillance.
  
  
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  You can spot limitations based on your geographic location.
  
  

Forward proxies are also employed for security systems that are centralized and have permission-based access for instance, in a workplace. If all internet traffic flows through a common forward proxy layer, an administrator is able to restrict access to certain individuals to access the web. This is then filtered by a common firewall. Instead of keeping firewalls in place to protect the client layer which may comprise a variety of devices that are different in user and environmental settings the firewall could be placed on the front proxy layer.

Take note of the fact that forward proxy servers require manual configuration for use, but reverse proxies are ignored in the eyes of the customer. Based on the fact that the IP address of a customer is sent to the source server via an forward proxy. Privacy and security can be granted, or not noticed.

There are many options to consider to find forward-looking proxy services:

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  Apache is a well-known open-source web server that provides forward proxy functions.
  
  
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  Nginx: Another well-known open-source server for web hosting with forward proxy functions.
  
  
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  Squid is an open-source forward proxy which utilizes the HTTP protocol. This does not include an entire web server service. We've got a guide on how to configure Squid proxy so that it allows private connections to Ubuntu 20.04.
  
  
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  Dante Forward Proxy that utilizes the SOCKS protocol instead of HTTP and is more suited to cases such as with peer-to-peer traffic. You can also look at how to set up Dante proxy to connect privately on Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy is an agent on behalf of web servers, which handles the incoming requests of clients on behalf of. This web server may comprise a single server, or a number of servers. It can also function in the role of an application server, such as Gunicorn. In any of these situations it is possible to get a request from a customer on the internet. The majority of the time it will be routed straight to the web server that hosts the services the customer needs. Reverse proxy acts as an intermediary, separating Web servers from direct communication with the internet.

From a user's perspective, which is the user's perspective connecting to reverse proxy isn't any different than connecting directly to your website server. It's exactly the same, but the client can't tell the distinction. The customer makes a request for an item and receives it with no additional configurations that need to be completed by the customer.

Reverse proxy proxies can provide features, like:

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  A centralized layer of security that guards the server.
  
  
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  Controlling traffic inbound based on rules that you establish.
  
  
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  A new feature to cache is now available.
  
  

Central security is a benefit of both forward and reverse proxy service, reverse proxies provide this feature to the level of an internet server, rather than clients. Instead of focusing on the maintenance of firewalls in the layer of web servers, which might contain several servers with different configurations, a majority of firewall security could be focused on this layer. Furthermore, removing the obligation of interfacing with firewalls and also interacting with client requests off of web servers lets them focus solely on serving the needs of their customers.

If there are multiple servers using a reverse proxy, the reverse proxy also determines the way requests are routed to which server. Many web servers may be offering the same content but they may offer different kinds of content, or a mix of them. These servers may use the HTTP protocol just like a standard web server, however, they might also use applications server protocols such as FastCGI. It is also possible to set up a reverse proxy to direct clients to specific servers based on the requested resource or to adhere to specific rules regarding traffic load.

Reverse proxies also can benefit from their positioning on top of web servers by providing caching functionality. Large static files can be configured with caching rules to stop the server from getting hit on each request, with certain solutions providing the possibility of providing static files directly without touching the web servers in any manner. In addition reverse proxy may be able to handle compressing these files.

The popular Nginx webserver is an extremely popular reverse proxy service. While the Apache web server is also equipped with a reverse proxy functionality as an added option. Apache as opposed to Nginx was originally designed and was designed specifically for reverse proxy functions.

Differentiating Forward Proxy and reverse Proxy Use Cases

Because "forward" in addition to "reverse" are associated with an impression of directionality and false comparisons to "incoming" or "outgoing" traffic These labels can confuse because both types of proxies handle both responses and requests. Instead, a better way to distinguish between forward and reverse proxy services is to consider the needs of the application you're developing.

A reverse proxy is useful in the design of a solution that can serve web-based applications via the internet. They are your web servers throughout all interactions on the internet.

A forward proxy can be helpful when placed before traffic from clients for personal use or for work. They are a representation of your traffic whenever you interact on the internet.

Differentiating by use case rather than focusing solely on the similar naming conventions will assist in avoiding confusion.

Conclusion

This article will explain what a proxy is with the two primary types, namely the forward proxy and reverse proxy. Application scenarios that are practical as well as an examination of useful characteristics were used to define forward proxies as well as reverse proxies. If you're interested to learn more about the process of implementing proxy servers, check out our tutorial on how to install Nginx as a reverse and web server proxy using Apache running on one Ubuntu 20.04 server.

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