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

An proxy is also known as a proxy server is piece of software that acts as an intermediary between a client and server on the internet. Without a proxy, a client could send a request for resources directly to a server and it would then serve the resource directly back towards the customer. This method is simple to grasp and implement however, the addition of proxy servers can offer benefits like increased performance as well as privacy, security and a host of other benefits. In addition to providing passing through, the proxy acts as a guardian to the internet between clients and servers.




In general, the bundled system of server hardware that is paired with installed proxy software is often called a proxy server. This article will focus on proxies typically described as software as well as in relation to web servers. There will be a discussion of the two main types of proxies, the other being forward proxy and the other being a forward proxy and reverse proxy. reverse proxy. Each kind has its own specific application, and is frequently confused due to the similar namesake convention.




This article will give you an understanding of what proxies and subtypes are in terms of their benefits for setups that are common. If you read in this post, you'll be able discern situations in which the use of proxy servers is beneficial, and you can then select the best option between reverse proxy and forward proxy, based on the circumstances.



Understanding Forward Proxies



Forward proxy, also known in the context of the open proxy is the agent of a user who would like to forward a request via the internet to an the server which originated it. In this situation every attempt to make requests through the client's end will instead be routed directly to forward proxy. Forward proxy in lieu of the client will look into the request. The first step is to verify if the client is authorized to accept requests from this specific forward proxy. It will then deny any request, or redirect it to the origin server. The client is not able to have direct connection to the internet and can only access what forward proxy permits it to access.




The most common reason for using forward proxy servers is the increased privacy or anonymity on the internet. A forward proxy accesses the internet through clients and, in this manner it may make use of an IP address that is distinct from the original IP of the client.




Depending on how it's been configured the forward proxy will provide a variety of functions as well as the ability to:




Beware of ad-tracker.


Circumvent surveillance.


Find restrictions based on your location.




Forward proxies also are employed in systems that offer centralized security as well as permission-based access, like in workplaces. When all internet traffic flows through a common forward proxy Administrators are able to allow only specific clients to access the internet via a common firewall. Instead of having firewalls installed for the client layer, which could include multiple machines that have different settings and environments and users, a firewall can be put in an forward proxy layer.




It is essential to note that forward proxy settings need to be manually setup to allow the use of these proxy servers in order to use them, while reverse proxy servers are unable to be noticed by the user. Based on whether or not an IP address belonging to the user is passed on to the server that originated it through the forward proxy, privacy and security settings, it can be granted or left transparent.




There are many alternatives to take into consideration when considering forward proxy choices:




Apache A well-known open source web server with forward proxy capabilities.


Nginx A renowned open-source server for web hosting that has forward proxy functions.


Squid: A no-cost forward proxy that utilizes the HTTP protocol. It's not the complete webserver system. We recommend our article on the best way to configure Squid proxy to handle secure connections within Ubuntu 20.04.


Dante Forward proxy that makes use of the SOCKS protocol instead of HTTP and HTTP, making it more suited to cases like peer-to -peer traffic. It is also possible to learn how to configure Dante proxy for secure connections within Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy functions as an intermediary to web servers and takes care of requests from clients on behalf of. The web server may serve as a single server or a number of servers. It could also be an application server such as Gunicorn. In all cases, the request for an application comes from a user via the internet in general. Most of the time, the request will directly go to the web server that hosts the content that the client is trying to find. Reverse proxy, however, acts as an intermediary to isolate your server from interaction via the web's public.




From the perspective of a user's perspective, using reverse proxy doesn't differ from interacting with your webserver directly. It is functionally the same but the client isn't able to tell the distinction. Client makes a request for an item, and gets it without requiring any additional configuration by the client.




Reverse proxy providers provide features like:




The web server is secured centrally.


The sending of traffic according to rules you set.


The caching functionality was added to the application.




While central security is a benefit of both forward and reverse proxy, reverse proxies provide this only for only the server layer and not to the client layer. instead of maintaining firewalls for Web server layers that may comprise multiple servers that have different configurations, the majority of firewall security is directed to the reverse proxy layer. Additionally, removing the burden of interacting with firewalls and interfacing with requests from clients off of web servers lets them focus on serving resources.




If there are multiple servers with a reverse-proxy, the reverse proxy is also responsible for controlling which requests go at the server. There could be multiple web servers running within the server each offering various kinds of resources, or a mix of the two. These servers may use the HTTP protocol like a traditional web server. They could also incorporate applications server protocols such as FastCGI. You can also configure reverse proxy settings to redirect the clients towards specific servers based on the service they require, or to observe certain guidelines regarding traffic load.




Reverse proxies can also take advantage of their placement over web servers through the capability of caching. The large static files can be configured with caching rules to avoid the web server from being hit with each request, with some solutions even allowing you to provide static files in a direct manner without linking directly to the website server. Furthermore, the reverse proxy is able to handle the compression of these assets.




The popular Nginx webserver is an extremely popular reverse proxy service. However, the Apache web server is also available with a reverse proxy function as an added feature that is available to Apache whereas Nginx was designed initially for and is specifically designed for the reverse proxy feature.



Distinguishing Forward Proxy from Reverse Proxy Use Cases



Because "forward" in addition to "reverse" are associated with the notion of directionality as well as misleading comparisons with "incoming" as well as "outgoing" traffic. These labels can be confusing as both types of proxies can respond to requests and responses. Another method of separating between forward and reverse proxy servers is to look at the needs of the application you are developing.




Reverse proxy is an effective tool to use when creating a solution for serving web applications on the internet. They act as your servers in any interaction with the Internet.




Forward proxy is a great tool to use when you are working with clients in front for personal use or in a work environment. They are a representation of your traffic when you are on the internet.




A distinction that is based on the use case instead of looking at the common naming conventions can assist you in avoiding confusion.



Conclusion



The article explained what a proxy is as well as two types of them: the reverse proxy and forward proxy. Practical examples of its use as well as a discussion of most beneficial features was used to distinguish forward proxies from reverse proxies. If you're looking to learn the ways to use proxies, we recommend you read our guide on how to configure Nginx as an internet server and reverse proxy for Apache running the Ubuntu 20.04 server.



If you have any queries with regards to where by and how to use Proxy Sites, you can contact us at our web-site.