Clear And Unbiased Details About Proxy Sites (Without All of the Hype) > 자유게시판

An proxy is also referred to as a proxy server, is software that acts in the role of intermediaries between client and server via the internet. In the absence of a proxy server, a client would send a request for any resource directly to the server, and servers would serve any requested resources directly to the client. Although this method is easy to comprehend and use, the addition of proxy servers could provide advantages like increased performance, privacy and security, etc. As an additional layer of security proxy servers function as a guardian for the internet, separating clients from servers.




There is a general consensus that the servers that are equipped with proxy software is also often called proxy servers. This article will focus on proxy servers that are typically categorized as software, and specifically in relation to web servers. We will present a summary of the two main kinds of proxy services: a forward proxy and reverse proxy. reverse proxy. Each type has a different use, which could be confusing because of the same namestamp.




This article will provide you with an idea of the different types of proxy and subtypes, and what they can do for common setups. After reading this article you'll know the scenarios where you can benefit from a proxy, and decide on the appropriate option between reverse proxy and forward proxy for any scenario.



Understanding Forward Proxies



Forward proxy, also known as an open proxy serves as an agent for users who wish to send a request via the internet to a source server. In this scenario, every request sent by the client will be sent through an forward proxy. A forward proxy in the position of the customer will examine the request. It first decides if the client is authorized to accept requests through this specific forward proxy. Then, it can either reject requests or send it back to server that originated it. The client will not be capable of having an internet connection directly; it will only be allowed access to the information that the forward proxy gives the access.




A very popular reasons for forward proxy is increased privacy or security on the internet. A forward proxy accesses the internet in lieu of a client's individual account, and during that process it may use a different IP address, in contrast to the original IP address of the client.




Depending on how it's been configured, based on the way it's configured, forward proxy may offer various options and let you:




Beware of tracking ads.


Circumvent surveillance.


Determine restrictions based on your location.




Forward proxies are also employed in systems to offer central security and permission based access, such as in workplaces. In the event that all internet traffic flows through a common forward proxy layer administrator can permit only certain users access to the internet. The web is controlled by a standard firewall. Instead of keeping firewalls in place for the client layer that could include multiple machines with different user configurations, firewalls may be placed on the front proxy layer.




Keep in mind that forward proxy servers must be set up manually for use, while reverse proxy servers could be ignored from the clients. Depending on the kind of IP address a client is sent to the server which originated it by the forward proxy privacy and security may be granted or made transparent.




There are many options to take into consideration in determining forward proxy:




Apache is an well-known open-source web server that offers forward proxy capabilities.


Nginx is another well-known open-source webserver that includes forward proxy capabilities.


Squid: An open source forward proxy that makes use of the HTTP protocol. It does not contain the entire web server. You can refer to our article on how to install Squid proxy to permit private connections on Ubuntu 20.04.


Dante is an forward proxy that utilizes the SOCKS protocol instead of HTTP this makes it appropriate for situations such as peer-to-peer communication. You can also check out how to configure an Dante proxy to allow secure connections within Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy is a web server, which handles the requests of customers on behalf of the server. It can be used as a single server or as a series of servers. In addition, it could include an application servers, like Gunicorn. In any of these instances the request will be made via the web at large. Most of the time, the request is sent directly to the server, along with the resources the client requires. Reverse proxy acts as an intermediary, separating your server from communications with the internet's users.




From a consumer's point of view from a client's perspective reverse proxy is not any different than connecting directly to an internet server. It's functionally identical, however the client can't discern the distinction. The client requests the resource and is then granted access without any additional configuration required from the client.




Reverse proxies offer options like:




A central layer of security to protect the server.


Directing incoming traffic using rules that you set up.


A new feature for caching has been added.




Although central security is an advantage of both reverse and forward proxy service, reverse proxies provide this benefit only to the server layer, not the client layer. Instead of focusing on the maintenance of firewalls at the server layer that could contain multiple servers and different configurations, the majority of firewall security is focused at the reverse proxy layer. Additionally, removing the burden of communicating with firewalls and interacting with requests from clients outside of web servers lets them focus on only the requirements of their clients.




In the case of multiple servers being hosted through reverse proxy the reverse proxy handles the routing of requests to the server that is hosting them. Multiple web servers could be serving the same resource, providing different types of resources or a mixture of the two. They may utilize an HTTP protocol to function as a normal web server, however they can additionally include applications server protocols like FastCGI. You can create reverse proxy servers to direct clients to specific servers based on the request for source, and to adhere to specific rules regarding traffic load.




Reverse proxies may also make use of their positioning before web servers by offering the ability to cache. Large static assets can be set by caching rules to avoid getting to web servers for every time you request. There are options that provide an option to serve static content without needing to connect with the webserver in any way. Furthermore, reverse proxy can handle compressing these assets.




The renowned Nginx web server has become a well-known reverse proxy option. It is true that it is true that the Apache web server does have the ability to reverse proxy as an additional feature that is available to Apache However, Nginx was originally designed to and is focused on reverse proxy functionality.



Differentiating Forward Proxy and reverse Proxy Use Examples



Since "forward" and "reverse" are both associated with an impression of directionality and inaccurate comparisons to "incoming" or "outgoing" traffic and could be confusing because both kinds of proxy servers process requests and response. A better approach to differentiate between reverse and forward proxy servers would be to look at the needs of the application you're building.




Reverse proxy is an important aspect in the design of a system to support web-based applications via the internet. They function as your servers during any interaction through the Internet.




Forward proxy can be useful for displaying customers for personal use or for use in a working environment. They represent the client's information when you connect to the internet.




A distinction based on usage cases instead of focusing on similar naming conventions will help avoid confusion.



Conclusion



The article clarified definition of a proxy. There are two types of them being the reverse and forward proxy. Practical applications and an exploration of beneficial attributes were used to identify forward proxies and reverse proxies. If you're interested exploring the role in proxy server, you can learn how to set up Nginx as an internet server and reverse proxy within Apache using the Ubuntu 20.04 server.



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