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It's an proxy, also called a proxy server, is a software which acts in the role of an intermediary a client and server over the internet. In the absence of a proxy server, a user can send a request to an entity directly through a server, and the server would then provide an item directly to the client. While this is a simple method to comprehend and implement using proxy services, it may offer advantages in terms of more performance and privacy, security and more. As an additional pass-through layer proxy, it acts as a security guardian for the internet between clients and servers.

The general set of server hardware along with installed proxy software is also often called proxy servers. This article will focus on proxies that are traditionally described as software, and when referring to web servers. This article will provide a detailed breakdown of the two main types: a forward proxy and a reverse proxy. reverse proxy. Each kind has its own specific usage situation, however they're often confused due to the same name-based convention.

This article will provide you with details about the types of proxies and the subtypes of them and how they operate in common configurations. In this article, you'll be able identify scenarios where you could make use of a proxy and decide on the most appropriate solution between forward proxy and reverse proxy in any circumstance.

Understanding Forward Proxies

The forward proxy, also known in the form of an open proxy is an agent for a user who wants to make a request via the internet to a source server. In this situation, it's the situation that all requests sent by the user would prefer to be sent through an forward proxy. A forward proxy acting in the on behalf of the user will review the request. It is the first thing to determine whether the client is permitted to send requests via this particular forward proxy. Then it can either reject the request or forward it to the original server. The client doesn't get direct internet access. It only has access to the internet that the forward proxy allows the client to access.

The most frequent uses for forward proxies is to improve privacy or anonymity on the internet. A forward proxy uses the internet as the client, and in this manner, it may utilize an alternate IP address that is different to the client's original IP address.

Based on the way it has been configured, based on how it is configured, forward proxy may give you a variety of choices and permit you to:

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  Do not click on ads that track you.
  
  
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  Circumvent surveillance.
  
  
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  You can determine restrictions based on your geographical place of residence.
  
  

Forward proxies are also utilized in systems that provide central security and access via permissions, such as in a workplace. If all internet traffic flows through a forward proxy, an administrator could grant only a small number of users online access, that is blocked by a standard firewall. Instead of putting firewalls in place for the client layer which could include multiple computers with different configurations and users the firewall can be placed in the layer that forwards proxy-related traffic.

Be aware that forward proxy servers require manual setup to use them, while reverse proxy servers may not be noticed to the user. Based on the type of IP address of the customer, if it is relayed back to the server from which it originated through the forward proxy privacy and anonymity may be granted, or left unnoticed.

There are many possibilities to explore to find forward proxy alternatives:

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  Apache An open-source, well-known web server that provides forward proxy features.
  
  
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  Nginx is another well-known open source web server that has forward proxy capabilities.
  
  
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  Squid is an open-source forward proxy that uses an HTTP protocol. Squid doesn't provide the complete web server service. We recommend that you follow our step-by-step guide on how to set up Squid proxy to allow private connections in Ubuntu 20.04.
  
  
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  Dante Forward Proxy that uses the SOCKS protocol rather than HTTP which allows it to be more appropriate for use cases like peer-to-peer traffic. It's also possible to find out how to install a Dante proxy to connect private connections on Ubuntu 20.04
  
  

Understanding Reverse Proxies

Reverse proxy serves as a representative for a web server, handling any requests that come in from clients on behalf of. This server can comprise a singular server or multiple servers. It could also function for application servers, such as Gunicorn. In any case, the request will come in from a client through the web in general. In most cases the request will go directly to the server along with the information the client requires of. Instead, a reverse proxy functions as an intermediary and is able to block it from direct interactions with the internet's open.

From a client's perspective the experience of interacting with reverse proxy is not different than interacting with a web server directly. It's the same thing and the client doesn't know the difference. The client asks for the resource, and receives it with no additional configuration needed on the part of the client.

Reverse proxy providers provide features like:

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  The web server is secured centrally.
  
  
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  Directing traffic according to rules that you decide to decide to define.
  
  
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  Additional functionality for caching.
  
  

While central security is a benefit of both reverse and forward proxy solutions, reverse proxies give this benefit to Web server layers but not to the client layer. instead of maintaining firewalls on the web server layer which may include multiple servers that have different configurations, the majority of firewall security is centered on the reverse proxy layer. Additionally to removing the responsibility of communicating with firewalls as well as communicating requests from clients who aren't connected to web servers lets them concentrate solely on providing resources.

In the event of multiple servers that are behind a reverse proxy the reverse proxy also is responsible for controlling which requests go to which servers. Multiple web servers might be providing the exact same resource, supplying various kinds of resources or a mix of both. They may use the HTTP protocol similarly to traditional web servers but include other protocols for application servers such as FastCGI. There is the possibility to configure reverse proxy services that redirects clients to particular servers based on the requested resource or to follow specific guidelines for traffic load.

Reverse proxies can also benefit from their placement prior to web servers, providing caching functions. Large static files can be set up with caching rules to avoid needing to connect with web servers on every request. There are even options allowing you to serve static files directly without touching the web server at all times. Additionally, reverse proxy can handle compression of these assets.

The well-known Nginx web server functions as a well-known reverse proxy solution. Although Apache can also be a reverse proxy service it is not the only reverse proxy solution. Apache web server comes complete with reverse proxy, which adds a feature to Apache but Nginx was initially designed for and focuses exclusively on reverse proxy feature.

Differentiating Forward Proxy and reverse Proxy Use Examples

Since "forward" or "reverse" are both associated with a sense of directionality and misleading comparisons with "incoming" and "outgoing" traffic and vice versa, these labels are often confusing since both kinds of proxies process requests and responses. The best way to differentiate between forward and reverse proxy is to look at the requirements of the app you're building.

Reverse proxy is an important tool in the development of an approach to offer web-based services on the internet. They are your web servers when you connect to the internet.

Forward proxy software is useful to show clients' personal usage, or even in a business environment. They are your client's proxy for all communications via the internet.

Separating by use case rather than using commonly used naming conventions can make it easier to prevent confusion.

Conclusion

This article explains what a proxy is, along with the two types of proxy, specifically, the forward proxy and the reverse proxy. Practical applications and a discussion of the beneficial features were used to distinguish forward proxies and reverse proxies. If you'd like to explore the possibilities of proxies then you should read our guide on how to configure Nginx as an reverse proxy and internet server in Apache running an Ubuntu 20.04 server.

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