• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

It is an proxy or proxy server, is a program that functions in the role of a intermediary between client and server on the internet. Without a proxy, a client can send a request every resource straight to the server and the server will serve the resource directly back to the user. While this approach is straightforward to comprehend and implement the addition of proxies can bring advantages in the form of improved 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 servers and clients.




There is a general consensus that the mix of hardware for servers as well as software used to set up proxy installations is commonly referred to as proxy servers. This article will concentrate on proxy servers that are typically classified as software, as well as in the context of web servers. We will discuss of the two primary types, namely which are a forward proxy and reverse proxy. reverse proxy. They each have their own usage situation, and is often misunderstood because of the similar terminology.




This article will provide you with some knowledge about the types of proxies and what subtypes they are and how they operate in common configurations. After reading this article, you'll be able to determine the circumstances where you could benefit by a proxy, and select the most appropriate forward and reverse proxy for every scenario.



Understanding Forward Proxies



The forward proxy, also referred to by the name of open proxy. open proxy is the agent of a user who would like to send a request via the internet to a source server. In this case the entire attempt to send requests by the user is instead forwarded by the forward-proxy. This forward proxy acting on behalf of the client will review the request. The first process is to determine if the client is able to accept requests through this particular forward proxy. The client then decides if it wants to deny a request or forward it to the 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 more privacy or security when surfing the web. Forward proxy can be used to access the internet in instead of a client and as such it could utilize a different IP address than that of the client's initial IP address.




Based on the way it has been set up the forward proxy can provide a variety of functions depending on the configuration and allows you to:




Beware of ads that track you.


Circumvent surveillance.


Find restrictions that are based on your area.




Forward proxies are also utilized for security systems which are centralised and have permission-based access, such as in the workplace. Every internet connection can go via the open forward proxy. an administrator could permit just a few users connection to internet using an common firewall. Instead of establishing firewalls at the layer of clients which may comprise a variety of machines that have different settings and users. A firewall can be installed at an forward proxy layer.




It is crucial to keep in mind that forward proxies must be set up manually for use, however reverse proxy servers will remain unnoticed by clients. Based on the fact that the IP address of the user is transmitted to the server that originated it from forward proxy privacy and anonymity might be granted or unnoticed.




There are a myriad of possibilities to explore forward proxy options




Apache: A popular open-source web server which provides forward proxy functions.


Nginx is a popular open-source web server that has forward proxy functions.


Squid is an open-source forward proxy that uses the HTTP protocol. It does not come with an complete web server application. We have a tutorial on installing Squid proxy to connect privately for private connections on Ubuntu 20.04.


Dante Forward Proxy that utilizes the SOCKS protocol instead of HTTP which makes it better to handle peer-to-peer traffic. You may also want to investigate how to set up an Dante proxy for private connections in Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy is the web server, that handles client requests on its behalf. The web server may serve as a single server, or as a set of servers. In addition, it could serve like an app server, such as Gunicorn. In any of these situations, the request is made by a user via the internet. Typically, the request is directly sent to the server that is the one that has the resources the user is requesting. Instead, a reverse proxy functions as an intermediary, separating it from any direct contact with the open internet.




From the perspective of the client, interacting using reverse proxy isn't different from interacting with your webserver directly. It's essentially the same, and the user cannot discern the distinction. Clients make requests for resources, which is followed by receiving it, without any additional configuration needed by the user.




Reverse proxies provide features like:




Centralized security for the web server layer.


The sending of traffic in accordance with rules you decide to define.


Additional features to cache data.




Although centralized security is an advantage of both reverse and forward proxy servers, reverse proxy services provide this benefit to the web server layer but not to the client layer. Instead of maintaining firewalls at the web server layer, which could contain several servers that have different configurations, the bulk of firewall security may be concentrated at the reverse proxy layer. Furthermore eliminating the burden of interacting with a firewall and interacting with requests coming from clients far from web servers allows them to concentrate on serving resources.




If multiple servers are that are running through a reverse proxy The reverse proxy determines how requests are routed which server. There could be multiple web servers that provide the same service, each providing different kinds of resources, or a combination of the two. They may use the HTTP protocol as a conventional web server, however, they could also incorporate applications server protocols like FastCGI. You can create reverse proxy servers to direct customers to specific servers depending on the resource requested or to adhere to certain rules regarding traffic load.




Reverse proxies can also benefit from their placement over web servers, as they provide caching capabilities. Massive static resources can be set up using caching rules to prevent the web server from being hit with every request. Certain solutions providing the option to deliver static files directly, without connecting to a web server even once. In addition, the reverse proxy can handle compression of these assets.




The popular Nginx webserver is also a very popular reverse proxy service. Although Apache is also a reverse proxy solution, the Apache web server has a reverse proxy functionality as an option that can be added to Apache while Nginx was originally designed for and focused on reverse proxy functionality.



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



Since "forward" along with "reverse" have connotations of directionality, and false distinctions between "incoming" and "outgoing" traffic These labels are prone to confusion since both kinds of proxy are able to handle requests and responses. Better yet, the best method to differentiate between forward and reverse proxy is to look at the requirements of the app that you're developing.




Reverse proxy is a crucial element when you're creating a solution for serving web applications on the internet. They are your web servers during any interaction via the internet.




A forward proxy is useful when used in front of clients for personal use or even in a workplace. They act as your client's proxy through any interaction with the internet.




Differentiating by use case as opposed to focusing only on standard name conventions can make it easier to avoid confusion.



Conclusion



The article explained the meaning of a proxy, with the two main types being the reverse proxy and forward proxy. Practical scenarios for use and a review of the most useful features were utilized to differentiate between forward proxies and reverse proxy. If you're keen to learn more about the possibilities of proxies then you can read our tutorial on how to install Nginx as an reverse proxy and internet server with Apache using the Ubuntu 20.04 server.



When you have any issues relating to where by in addition to tips on how to make use of Proxy Sites (https://www.metooo.io/), you can call us on our website.