• 목록
• 답변
• 게시판 리스트 옵션
  • 수정
  • 삭제

An proxy is also known as a proxy server software that acts as a mediator between a client and server via the internet. Without an intermediary the client would an attempt to request the resource directly to a server and the server would then serve the resource directly back to the user. While this process is simple to comprehend and implement using proxies, it can provide benefits such as more speed, privacy and security, and many more. In addition to adding a layer of security proxy servers also serve as a safeguard for the internet between clients and servers.




Generally speaking, the bundled package of server hardware with installed proxy software is often referred as proxy servers. However, this article will focus on proxy servers that are traditionally referred to as software, but also when referring to web servers. We will provide a brief overview of the two primary types: one being forward proxy and the other being a forward proxy and the other a reverse proxy. reverse proxy. Each type has a different usage, which can be confusing due to the similar namesake convention.




This article will provide you with the knowledge of the types of proxy services available and their subtypes, and the ways in which they can be beneficial in common configurations. In this article you'll be aware of the situations in which you can benefit by a proxy, and select the right solution between reverse and forward proxy, in any circumstance.



Understanding Forward Proxies



Forward proxy, also known by the name of an open proxy, acts as the agent of a client who wishes to send requests via the internet to a server that initiated it. In this case, it's the case that all requests from the client will be directed directly into forward proxy. This forward proxy acting in the place on behalf of client look into the request. In the beginning, it will decide whether the client is authorized to submit requests through this particular forward proxy. It will then either reject requests or redirect it to the original server. The client will not be able to have directly access to internet; it can only be allowed to access details that the forward proxy enables the client to access.




A popular use for forward proxy is the desire for greater privacy or security online. Forward proxy has the ability to connect to the internet as the client, and in this way, it is using another IP address, in contrast to the IP address of your client.




Depending on how it has been configured, based on how it is configured forward proxy could offer a range of functions and the capability to:




Beware of Ad-trackers.


Circumvent surveillance.


You can identify limitations based on your geographic location.




Forward proxies are also used in systems of centralized security and access based on permissions, for example in workplaces. If all internet traffic goes by an open forward proxy a administrator may restrict access to certain clients to the internet through a common firewall. Instead of establishing firewalls for the client layer that can include multiple machines with various configurations and users the firewall can be installed at the forward proxy layer.




Remember that forward proxies need to be manually set up to work and reverse proxies could not be noticed by the user. Depending on the kind of IP address the client that is transferred to the origin server through forward proxy privacy and anonymity could be granted or left transparent.




There are a myriad of possibilities to look into for forward proxy services:




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


Nginx is another well-known open-source web server that has forward proxy capability.


Squid: An open-source forward proxy that utilizes the HTTP protocol. Squid doesn't come with a complete Web server software. It is possible to refer to our instructions on how to set up Squid proxy to allow private connections on Ubuntu 20.04.


Dante Forward Proxy that uses the SOCKS protocol instead HTTP and is better suited for certain scenarios like peer-to-peer connections. You can also learn how to configure Dante proxy to support private connections in Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy functions as an agent for a server on the internet and takes care of any requests that come in from clients on its behalf. The web server can serve as a single server, or a number of servers. It could also function as an app server, such as Gunicorn. In all of these scenarios, a request would come from a user on the internet in general. Most of the time, the request would be sent directly to the web server which has all the resources the client would be looking for. However, a reverse proxy functions as an intermediary that shields the webserver from direct contact with the internet.




From an individual or user's perspective reverse proxy's process reverse proxy is not any different from working with the web server directly. It's functionally the same however the client cannot tell the difference. The client makes a request for a resource, which is then followed by the receipt of it, with no additional configuration needed on the part of the client.




Reverse proxy proxies may offer features, like:




Centralized security for the web server layer.


Controlling traffic inbound according to rules you establish.


The caching function has been added to the app.




While centralized security is an advantage of both forward and reverse proxy service, reverse proxies give this benefit only to Web server layers, not to the layer that clients use. instead of having to maintain firewalls on Web server layers which could contain multiple servers with various configurations, the majority of firewall security is concentrated at the reverse proxy layer. In addition, getting rid of the necessity of interfacing with a firewall and responding to requests from clients via web servers allows them to concentrate on delivering resources.




In the case of multiple servers running behind a reverse proxy, it also controls how requests are routed to the correct server. A number of web servers could be providing the exact same service, each serving various kinds of resources or a mix of both. These servers could use the HTTP protocol to perform the role of a web server in the traditional sense, but they can also incorporate application server protocols like FastCGI. You can set up a reverse proxy to route customers to a specific server according to the requested resource or to adhere to certain traffic load rules.




Reverse proxies also benefit from their positioning before web servers through the capability of caching. Large static assets can be configured by caching rules so that they avoid having to contact web servers for every request. There are solutions that offer the option to directly serve static assets, without needing to connect to the web server at all. Furthermore, reverse proxy can be used to handle compression of these assets.




The popular Nginx webserver is a reliable reverse proxy solution. While you can use it, the Apache web server, it also comes with reverse proxy, which is an additional function of Apache in contrast to Nginx was designed initially for and is focused on the reverse proxy feature.



The distinction between Forward and Reverse Proxy Use. The difference between Forward Proxy and Reverse Proxy Use



Because "forward" or "reverse" have connotations that refer to directionality, and false connections to "incoming" as well as "outgoing" traffic, the labels can be confusing because both kinds of proxy services can handle requests as well as responses. The best way to distinguish between forward and reverse proxy services is to consider the requirements of the app that you are developing.




Reverse proxy can be useful in the development of a solution to serve web-based applications via the internet. They act as your web server in any interactions with the internet.




Forward proxy applications can be advantageous when employed in front of the client for your personal use or in a workplace setting. They are a representation of your client's internet traffic, for any internet-based interaction.




The use case-based differentiation instead of focusing solely on identical naming conventions will make it easier to avoid confusion.



Conclusion



In this article, we clarified the meaning of a proxy and the two most common types of them that are the forward and reverse proxy. Practical applications and a glance at positive characteristics were utilized to define forward proxies as well as reverse proxies. If you're interested in learning more about how proxies are implemented, look into our tutorial on how to configure Nginx as an internet server and reverse proxy for Apache on one Ubuntu 20.04 server.



If you want to see more about Proxy Sites - forum.dydaktyka.fizyka.umk.pl - visit our webpage.