• 목록
• 답변
• 게시판 리스트 옵션
  • 수정
  • 삭제

It's also known as proxy or proxy server. proxy or proxy server. is a server software program that serves as an intermediary between a clients and servers via the internet. Without an intermediary, a customer can make a request for any resource directly to the server, and the server would then serve direct the resource requested to the client. While this process is simple to understand and apply using proxies, it can provide advantages in the form of more performance, privacy, security, and more. As a layer of pass-through, the proxy functions as a security intermediary between the servers and clients.




In general, the system of hardware for servers and software for proxy installation is commonly referred to in the context of proxy servers. In this article, we'll concentrate on proxies that are typically thought of as software, as well as ones that work together with web servers. You will get a breakdown of the two main kinds of proxies: a forward proxy and a reverse proxy. reverse proxy. Each kind has its own unique application scenario, which is often misunderstood due the similar naming convention.




This article will provide you with an understanding of what proxies and their subtypes are, and also how they can be used in typical configurations. Through this article, users can identify the scenarios where an effective proxy is beneficial, and choose the correct solution in between reverse and forward proxy for any particular circumstance.



Understanding Forward Proxies



Also a forward proxy also known as open proxy open proxy is the client's representative who is trying to transmit a request via the internet to an origin server. In this case, all request to send it by the client will be handled by the forward proxy. In this scenario, the forward proxy acting in the place of the client will examine the request. First, it will determine what authorization the user has to make requests via this particular forward proxy. It will then reject this request and transfer it over to the server that originally sent it. The client is not able to establish a direct connection to the internet. It can only reach what forward proxy grants it access to.




One of the most popular applications for forward proxy servers is to provide greater privacy or security on the internet. A forward proxy can be utilized to connect to the internet place of a client and, in doing so, may use a different IP address that is different from the original IP address of the client.




Based on the way it was configured in the past forward proxy servers are able to provide a variety of functions and let you:




Avoid ad tracking.


Circumvent surveillance.


You can determine limitations based on your geographic location.




Forward proxies can also be used in security systems that require centralized and permission based access for instance, in the workplace. If all internet traffic flows through an open forward proxy, administrators can allow access only to specific users to the internet, which is blocked by a standard firewall. Instead of putting firewalls in place to protect the client layer that could be comprised of a variety of computers with different user and environment, a firewall can be placed at an forward proxy layer.




Take note of the fact that forward proxy servers require manual configuration to function, However reverse proxy will be not noticed to the user. Based on the fact that the IP address of a customer is sent to the source server through the forward proxy, privacy and security may be granted or left unnoticed.




There are many options to investigate for forward proxy options:




Apache is an well-known open-source web server, which provides forward proxy capabilities.


Nginx: Another well-known open-source web hosting server with forward proxy capabilities.


Squid is an open-source forward proxy which makes use of the HTTP protocol. This option doesn't include the entire web server. We've got a guide on how to install Squid proxy for private connection on Ubuntu 20.04.


Dante Forward Proxy that utilizes the SOCKS protocol instead of HTTP, making it more suitable for situations like peer-to peer traffic. It is also possible to look at how to set up Dante proxy to connect privately on Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy is an agent on behalf of a web server that handles any requests that are received by clients on behalf of. The web server could consist of a single server or multiple servers. It may also act for application servers, such as Gunicorn. In any of these scenarios, it is possible to get a request from a client through the internet in general. Most of the time, this request will go straight to the web server that hosts the resources the client is in need of. Reverse proxy is an intermediary, separating Web servers from direct interactions with the open internet.




From a client's perspective that is the user's perspective, interfacing with reverse proxy isn't different from connecting directly to your website server. It's exactly the same, but the client can't be able to tell the distinction. The customer makes a request for an item and is given it with no additional configurations that need to be done by the customer.




Reverse proxy proxies may offer some features, including:




A central layer of security to protect the server.


Controlling traffic coming inbound according to rules that you can set up.


A new feature to cache is now available.




While central security is an advantage of both reverse and forward proxy service, reverse proxies provide this service to this layer of the internet server, rather than clients. In lieu of maintaining firewalls in the layer of web servers which may include multiple servers with various configurations, a majority of firewall security is targeted at the reverse proxy layer. Additionally, getting rid of the necessity of interfacing with a firewall as well as interacting with clients' requests through web servers enables them to concentrate solely on meeting the requirements of their clients.




If there are several servers running through reverse proxy the reverse proxy determines the way requests are routed to which server. There are many web servers providing the same content but they may offer different kinds of content, or a combination of both. These servers may use the HTTP protocol similar to a traditional web server, however, they might also use applications server protocols like FastCGI. You can also configure reverse proxy servers to redirect clients to specific servers in accordance with the resource requested or to follow specific rules regarding traffic load.




Reverse proxies may also make use of their position before web servers by providing caching functionality. Large static files can be configured with caching rules to stop the server from getting hit on each request, with certain solutions providing the option to provide static files without contacting the servers in any manner. Additionally reverse proxy may manage the compression of these assets.




The popular Nginx web server has become a wildly popular reverse proxy service. However, the Apache website server also equipped with reverse proxy functionality and is an alternative choice for Apache in contrast to Nginx was originally designed and focused on reverse proxy functionality.



Differentiating Forward Proxy and reverse Proxy Use Examples



Since "forward" in addition to "reverse" are ascribed to the notion of directionality and a false comparison with "incoming" and "outgoing" traffic These labels are confusing because both types of proxies handle both responses and requests. A better approach to distinguish between reverse and forward proxy is to take into account the needs of the application that you are developing.




Reverse proxy can be useful in designing a solution that can deliver web-based apps via the internet. They represent your web servers in all interactions on the web.




Forward proxy can be useful when it is placed in front of client traffic for personal use or in a work environment. They represent the traffic of your clients every time you connect to the internet.




The use case distinction instead of focusing on the similar naming conventions will assist you in avoiding confusion.



Conclusion



This article describes the definition of a proxy, with the two main kinds being reverse and forward proxy. Practical application scenarios as well as an examination of the most useful attributes were used to determine forward proxies and reverse proxies. If you're interested in learning more about the process of implementing proxy services, you can refer to our tutorial on how to install Nginx as an internet server and reverse proxy using Apache using the Ubuntu 20.04 server.



If you have any queries relating to where and how to use Proxy Sites, you can contact us at our own web site.