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It's a proxy or proxy server. It is software that acts as a mediator between a client and server on the internet. Without a proxy, a user would be able to send a request every resource straight to the server and the server would provide the resource directly at the request of the customer. While this is a simple method to comprehend and implement the addition of proxies can bring advantages in the form of increased performance and privacy, security and many other benefits. As a pass-through layer, a proxy is an extra layer of security on the internet between clients and servers.

There is a general consensus this: the mix of servers hardware and software used to set up proxy installations is often referred too as proxy servers. However, this article will focus on proxy servers that are usually classified as software and also in the context of web servers. The article will provide a detailed discussion of the two primary types, namely which are a forward proxy and reverse proxy. reverse proxy. Every one has its unique unique usage scenario, which is often confused due to the same terms.

This article will give you some knowledge about the different types of proxy and what their subtypes are, and how they work in common configurations. After having read this article, you'll be able to determine the circumstances in which you can benefit by a proxy, and select the most appropriate forward and reverse proxy for every situation.

Understanding Forward Proxies

The forward proxy, also known as an open proxy acts as the representative of a customer who wants to send a request via the internet to a source server. In this case the entire attempt to send requests made by the user will be sent to the forward-proxy. The forward proxy, acting in the client's stead, will review the request. The first process is to determine if the client is permitted to accept requests through this specific forward proxy. The client then decides if it wants to decline a request and forward it to its original server. The client isn't capable of having an internet connection directly. It can access only what forward proxy allows for it to be connected to.

One of the most popular uses for forward proxy servers is to obtain greater privacy or security when surfing the web. Forward proxy can be used to access the internet lieu of a client, and, in this way it can utilize a different IP address than the initial IP address.

Depending on how it has been set up the forward proxy will offer various functions based upon the way it has been configured that lets you:

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  Stay clear of tracking ads.
  
  
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  Circumvent surveillance.
  
  
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  Find restrictions that are based on the location you are in.
  
  

Forward proxies can also be used for security systems that are centralized and based on permission access, such as in the workplace. The entire internet can be passed by the open forward proxy, administrators can allow only a handful of clients access to the internet through an common firewall. Instead of establishing security firewalls on the server layer which could comprise a range of machines that have different configurations and users, a firewall can be placed in the forward proxy layer.

It is crucial to keep in mind that forward proxies need to be set up manually for use however reverse proxies will remain unnoticed by clients. Depending on the type of IP address of a user is transferred to the server that originated it from the forward proxy privacy and anonymity may be granted, or left unnoticed.

There are a myriad of options to consider for forward proxy options:

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  Apache is a well-known open-source web server which provides forward proxy functions.
  
  
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  Nginx is a popular open-source web server with forward proxy capabilities.
  
  
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  Squid is an open-source forward proxy which makes use of the HTTP protocol. It doesn't come with an entire website server program. Check out our guide on how to install Squid proxy for private connections on Ubuntu 20.04.
  
  
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  Dante Forward Proxy that utilizes the SOCKS protocol instead of HTTP which makes it more suited for cases like peer-to-peer communication. It's also worth taking a look explore how you can set up the Dante proxy to connect privately in Ubuntu 20.04
  
  

Understanding Reverse Proxies

The reverse proxy acts as the server that handles client requests on its behalf. The web server may serve as a one server or a number of servers. It can also serve like an app server, such as Gunicorn. In any of these scenarios, the request will come from an internet-connected user. In most cases, the request will be directly sent to the web server which has the resources that the user needs. Instead, a reverse proxy acts as an intermediary, separating it from any direct contact with the open internet.

From the viewpoint of the user, working using reverse proxy isn't different from connecting to your website server direct. It's functionally the same and the user cannot discern the distinction. Clients make a request for a resource, which is followed by receiving it with no further configuration by the user.

Reverse proxies can provide features such as:

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  Security centralized for web servers.
  
  
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  Directing traffic in accordance with rules you decide to define.
  
  
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  Additional functionality for caching.
  
  

Although centralized security is a benefit of both reverse and forward proxy servers. Reverse proxy services provide this benefit only to those who use the server layer, but not the layer that clients use. Instead of having to maintain firewalls at the layer of web servers which could contain several servers that have different configurations, most of the firewall security can be concentrated at the reverse proxy layer. Furthermore eliminating the burden of interacting with a firewall and interacting with requests from clients away from web servers lets them focus on serving the resources.

If multiple servers are operating in a reverse proxy, the reverse proxy takes care of the way requests are routed to the server. There could be multiple web servers that provide the same service, each providing various kinds of resources or a mix of both. They can utilize the HTTP protocol to function as a standard web server, however, they could also incorporate application server protocols such as FastCGI. It is possible to set up a reverse proxy to route clients to specific servers based upon the requested resource or to follow specific rules for traffic load.

Reverse proxies also profit from their positioning on top of web servers, as they provide caching functionality. The large static files can be set up with caching rules in order to avoid from hitting web servers with every request, with certain solutions providing the option to provide static files without having to connect to the web server even once. Additionally, reverse proxy is able to handle compression of these files.

The popular Nginx website server also a very popular reverse proxy service. Although Apache is also a reverse proxy solution but this Apache web server has reverse proxy functions as an additional option to Apache however Nginx was designed originally for and focused on reverse proxy functionality.

Differentiating Forward Proxy and Reverse Proxy Use Differentiating Forward Proxy and Reverse Proxy Use

Since "forward" and "reverse" are associated with the notion of directionality and false comparisons to "incoming" in addition to "outgoing" traffic the labels could be confusing because both types of proxies are able to handle requests and responses. Better yet, the best method of separating between forward and reverse proxy is to analyze the requirements of the app that you're developing.

Reverse proxy is an important aspect when developing a solution to serve websites on the internet. They act as your web server for any interaction on the internet.

A forward proxy is beneficial when it is used before customers for your own use or in a work environment. They serve as the proxy for your client via any communication with the internet.

The use case-based differentiation as opposed to focusing only on the common names can make it easier to avoid confusion.

Conclusion

The article explained the significance of a proxy and two types of proxy, the reverse proxy and forward proxy. Practical scenarios for using them and a discussion of the most useful features were utilized to differentiate between forward proxies and reverse proxies. If you're interested to learn more about the benefits of proxies, you can read our tutorial on how you can install Nginx as an reverse proxy and internet server with Apache using Ubuntu 20.04 Server. Ubuntu 20.04 Server.

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