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"proxy" is a term used to describe a server "proxy" is a reference to the notion of a proxy frequently referred to as proxy servers are software that functions in the role of intermediary between client and server via the internet. Without a proxy, a client could make a request for an online server and the server will serve an item directly for the client. While this is a simple method to grasp and use, proxies can provide advantages such as more performance, privacy and security, and so on. As a layer of pass-through, the proxy serves as a shield to the internet between users and servers.

It is generally accepted that the set of server hardware and the software to install proxy servers is commonly called proxy servers. This article will focus on proxy servers that are generally classified as software, and specifically with respect to web servers. This article will give a synopsis of the two principal kinds of proxies, which is forward proxy and reverse proxy. forward proxy and reverse proxy. reverse proxy. Each type has its own usage scenario, which is often misinterpreted due the common terminology.

This article will give you an idea of nature of proxies, as well as their subtypes are and the ways that they can prove useful in a variety of configurations. If you go through this article, you'll learn to identify the circumstances in which the use of proxy servers is beneficial, and then determine the most appropriate alternative between forward and reverse proxy for a particular scenario.

Understanding Forward Proxies

Forward proxy is also known in the context of the open proxy, acts as the representative of the client trying to transmit a request through the internet to a source server. In this case every attempt to send a request by the user will instead be handled by the forward proxy. The forward proxy, in place of the client examines the request. Then, it will decide whether or not the client is able to transmit requests through this particular forward proxy. Then, it will decide whether to reject the request or forward it to the server that originated the request. The client isn't able to have direct connection with the Internet. It can only connect to the internet that the forward proxy allows it to connect to.

The primary reason for people for using forward proxy services is to gain greater privacy or security when using the internet. A forward proxy is able to access the internet rather than clients, and in this manner, it is using a different IP address than the IP address used by the client.

Depending on how it's configured, and how it's configured, forward proxy may offer a range of functions and allow users to:

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  Beware of ad-tracker.
  
  
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  Circumvent surveillance.
  
  
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  You can identify limitations based on your geographic place of residence.
  
  

Forward proxies can also be used for security systems which are centralized and accessible is based on permissions, such as at a workplace. If all internet traffic is routed through a common forward proxy layer an administrator can restrict access to only a limited number of users to the internet, which is filtered by an common firewall. Instead of setting up filters for client layers which could be used by a variety of computers, with various settings and types of users, you can establish an firewall that is located in the front proxy layer.

Be aware that forward proxy servers require manual configuration to be used, whereas reverse proxies are able to remain unnoticed by clients. Based on whether your IP address a user is relayed back to the origin server by the forward proxy privacy and anonymity may be granted or denied.

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

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  Apache A well-known, open-source web server that has forward proxy capability.
  
  
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  Nginx: Another popular open-source webserver, which includes forward proxy capabilities.
  
  
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  Squid: A free forward proxy that uses the HTTP protocol. It's not part of the complete web server. Learn more about how to set up Squid proxy to permit private connections to Ubuntu 20.04.
  
  
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  Dante Forward proxy that utilizes the SOCKS protocol instead HTTP which is more appropriate for situations such as peer-to-peer connections. It is also possible to know how to set up Dante proxy to permit private connections on Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy serves as an agent for a web server that handles customer requests for its behalf. This server can represent either a single or multiple servers. It could also represent an application server, such as Gunicorn. In either scenario the request will be made through the internet generally. The request is typically sent directly to the server which hosts the resources that the client requires of. Instead, a reverse proxy acts as an intermediary that isolates the web server from direct interactions with the internet's public.

From the perspective of the individual client's viewpoint the process of utilizing reverse proxy is the same than working with the server in its own way. It's the same, but the client is unable to see the difference. Client makes a request for the resource and is then supplied with it, without additional configuration required from the user.

Reverse proxies provide features like:

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  The server for the web is secure centrally.
  
  
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  Incoming traffic is directed based upon rules you set.
  
  
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  A new feature to cache has been added.
  
  

While central security is an advantage of both reverse and forward proxy servers. Reverse proxies offer this feature to only the server layer, not the client layer. Instead of focusing on the maintenance of firewalls at the server level that could include multiple servers with different configurations, the majority of firewall security is centered on the reverse proxy layer. In addition, removing the burden of interacting with firewalls and connecting to requests from clients away from web servers allows firewalls to concentrate on providing the requirements of their clients.

When there is a multitude of servers hosted within a reverse proxy the reverse proxy is responsible for how requests are routed to which server. There could be multiple web servers providing the exact same service, offering different kinds of resources, or a mix of both. They may employ their HTTP protocol to serve as a standard web server, however they can also use application server protocols such as FastCGI. You can also configure reverse proxy settings to send users to a specific server based on the resource being requested or to abide by specific rules regarding traffic load.

Reverse proxies may also profit from their placement before web servers by offering caching capabilities. Large static assets may be configured with caching rules in order to prevent hitting web servers each time you request. There are options that allow users to serve static assets, without connecting with the server on any manner. In addition, the reverse proxy is capable of compressing these assets.

The renowned Nginx web server functions as an effective reverse proxy service. While Apache can also be a reverse proxy solution, the Apache web server is also fitted with reverse proxy feature which is a option that is accessible to Apache but Nginx was initially designed specifically for reverse proxy features.

The distinction in Forward Proxy and Reverse Proxy Use Cases

Since "forward" and "reverse" are associated with the notion of directionality, and false analogies to "incoming" or "outgoing" traffic The labels can be confusing as both types of proxies handle requests and responses. The best way to distinguish between reverse and forward proxy is to analyze the specifications of the application that you're creating.

Reverse proxy can be useful when you are developing a solution to deliver web-based applications to the internet. They serve as your web servers whenever you use the internet.

Forward proxy is helpful when you are before customers for your own usage or in an office setting. They act as your client's proxy for interactions on the internet.

The ability to differentiate by the use of case instead of focusing on common naming conventions can aid in avoiding confusion.

Conclusion

This article explains what a proxy is with two kinds: reverse proxy and forward proxy. Examples of how to use it as well as a look at the useful characteristics were used to differentiate forward proxies from reverse proxies. If you're interested to learn more about the use of proxy servers, you should look over our guide on how you can configure Nginx as reverse proxy with Apache on one Ubuntu 20.04 server.

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