The Next 8 Things To Immediately Do About Proxy Sites

The term "proxy" refers to a proxy is also known as the software for proxy servers acts in the role of an intermediary server and client on the internet. With no proxy in place, a client could send a request to an online resource directly to a server and the server could serve the resource directly back at the requester's. Although this method is easy to understand and implement but using proxies provides advantages such as increased performance as well as privacy, security and many more. As an additional pass-through layer the proxy acts as a security guardian of the internet between servers and clients.

In general, the mixture of the server's hardware and proxy software is commonly called proxy servers. This article will focus on proxies that are traditionally classified as software when referring to web servers. This article will present the full description of two types: forward proxy and reverse proxy. reverse proxy. Each type has its own usage scenario, which is often not understood due to the similar terminology.

This article will provide information about the different types of proxy services, what their subtypes, as well as how they function in various configurations. After reading this article, you will be able to recognize the instances where the use of proxies is advantageous and pick the right solution between forward and reverse proxy in any given scenario.

Understanding Forward Proxies

The forward proxy sometimes called the open proxy acts as a representative for a customer who needs to make an internet-based request to an the server which originated it. In this scenario the entire attempt to send requests made by the user is instead made through the forward proxy. A forward proxy, acting as a substitute for the client will take a look at the request. It will then determine whether the user is authorised to send requests using this specific forward proxy. Then, it decides to refuse any request or to forward it to the server that originated it. The client has no direct access to the internet. It can access only what forward proxy allows it access to.

A popular use for forward proxy is to provide greater privacy or security while using the internet. Forward proxy is able to access the internet on behalf of a client. by doing this it may use an alternative IP address to the IP address used by the client.

Depending on how it's been configured, based on the way it is configured, forward proxy may grant you various features depending the way it's configured and enables you to:

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  Do not be a victim of ad tracking.
  
  
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  Circumvent surveillance.
  
  
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  Be aware of restrictions based on the location.
  
  

Forward proxies are also utilized to secure systems that are centralized as well as access that is permission-based for instance, such as at work. If all traffic on the internet passes through an open forward proxy an administrator is able to permit only a small number of clients online access by the standard firewall. Instead of setting up firewalls for the client layer which can comprise a variety of machines that have various environments and users A firewall can be positioned on top of this forward proxy layer.

It is important to remember that forward proxies must be manually configured to use while reverse proxies will not be detected by the user. Depending on the type IP address of a user is transferred to the server from which it originated through the forward proxy, privacy and anonymity may be granted or denied.

There are a variety of options to consider for forward proxy services.

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  Apache An open source well-known web server that provides forward proxy features.
  
  
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  Nginx is another widely-used open-source web server that has forward proxy capabilities.
  
  
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  Squid is a free forward proxy that uses an HTTP protocol. Squid doesn't include the full web server. We have an article about the best method to set up Squid proxy for private connections on Ubuntu 20.04.
  
  
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  Dante is forward proxy which makes use of the SOCKS protocol instead of HTTP and HTTP, which makes it better for applications like peer-to-peer communication. You can also check out how to configure Dante proxy to allow private connections in Ubuntu 20.04
  
  

Understanding Reverse Proxies

A reverse proxy is an intermediary for a web server that handles incoming requests from clients on its behalf. Web servers can comprise one or more servers. Also, it could become an application-server such as Gunicorn. In any of these scenarios, the request will originate from the web at large. In most cases, your request is sent directly to a web server with the information the user is looking for. A reverse proxy serves as an intermediary, isolating the webserver from direct communications with the internet.

From the perspective of a user the experience of using reverse proxy is not different from communicating with an internet server direct. It's basically the same, but the user is unable to be able to discern the difference. The client asks for a resource and then receives it without extra configuration required on the part of the client.

Reverse proxies provide features like:

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  Security centralized to web server.
  
  
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  The direction of traffic coming in by implementing rules that you establish.
  
  
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  New feature added to caching.
  
  

While centralized security can be a benefit of both reverse and forward proxy servers. Reverse proxy providers offer this feature only to that layer on the webserver, not clients. Instead of maintaining firewalls at the layer of web servers that could include multiple servers and different configurations, the majority in firewall protection is targeted to the reverse proxy layer. Additionally, removing the responsibility of interacting with a firewall and communicating with requests from clients off of web servers enables them to focus solely on addressing the needs of their customers.

In the case of multiple servers running a reverse-proxy the reverse proxy is also responsible for the direction of which requests are directed to which servers. Multiple web servers could be running within the same system, offering different kinds of resources, or a combination of both. They can utilize the HTTP protocol as a traditional web server, however they can also be equipped with applications server protocols, like FastCGI. It is possible to set up reverse proxy to direct users to a specific servers based on the services required, or to certain rules regarding the load of traffic.

Reverse proxies can also benefit by being placed over web servers, as they provide the ability to cache. Massive static files can be configured using caching rules to prevent having to contact web servers every time. Certain solutions allow you to directly serve static content without having to communicate with the webserver even once. In addition the reverse proxy is capable of handling the compression of these assets.

The well-known Nginx web server is also used as a well-known reverse proxy service. Although Apache is also a reverse proxy solution, the Apache web server does have reverse proxy functions, but it's a distinct feature to Apache in contrast to Nginx was designed initially to and focuses specifically on reverse proxy features.

Differentiating Forward Proxy and reverse Proxy Use The Case

Since "forward" and "reverse" are associated with an impression of directionality and misleading comparisons with "incoming" in addition to "outgoing" traffic the labels could be confusing as the two types of proxies deal with the processing of requests as well as responses. The best method to distinguish between reverse and forward proxy services is to take into account the requirements of the application that you are developing.

Reverse proxy can be useful when building a solution to provide web-based applications over the internet. They act as your web server in any interaction with the web.

Forward proxy can be useful when they are displayed before users for personal use, or in the workplace. They represent the traffic of your client when you use the internet.

Separating by use case instead of just focusing on the most common naming conventions can make sure that you don't get confused.

Conclusion

This article provides the definition of a proxy using the two primary types, which are the reverse proxy and forward proxy. Practical examples of use as well as a review of the beneficial features was utilized to distinguish forward proxies from reverse proxy. If you're interested to learn more about the benefits of proxies, then you can check out our guide on how to configure Nginx as a web server and reverse proxy within Apache on one Ubuntu 20.04 server.

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