• 목록
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

An proxy is also known as a proxy server software acts in the role of an intermediary the server and client over the internet. Without the proxy, a client could submit a request for a service directly from a server and the server would then serve the requested resource directly back to the user. This is a simple method to comprehend and implement, the addition of proxies can bring benefits such as improved performance and security, privacy, and much more. As an additional pass-through layer the proxy serves as a security guardian of the internet between clients and servers.




Generally speaking, the combined mix of hardware for servers with proxy software is commonly referred too as proxy servers. This article will focus on proxy servers that are typically classified as software specifically in relation to web servers. This article will provide an in-depth breakdown of two types: forward proxy and reverse proxy. reverse proxy. Each kind has its own unique usage situation, and it is frequently confused due to the same terms.




This article will give you details about the different types of proxy services, what their subtypes are and how they work with a range of configurations. After reading this article, you will be able to identify the instances where using proxies can be advantageous, and select the right solution between reverse and forward proxy for any particular scenario.



Understanding Forward Proxies



The forward proxy also referred to the open proxy acts as a representative for a customer who needs to send a request via the internet to an the server which originated it. In this scenario the entire process of sending requests made by the user will be transmitted through the forward proxy. A forward proxy, acting instead of the client will take a look into the request. Then, it determines if this user is authorised to send requests via this particular forward proxy. Then, it decides to refuse any request or forward it to the source server. The client has no direct connection for the web. It is able to access only the information that the forward proxy allows the client to connect.




A popular use for forward proxies is increased privacy or security while using the internet. Forward proxy allows access to the internet instead of a client. in this way it may use an alternative IP address to the original IP address of the client.




Depending on how it's been configured and how it's configured forward proxy could provide you with different features based the way it's configured and enables you to:




Don't be a victim of ad-tracking.


Circumvent surveillance.


Recognize restrictions based on geographical location.




Forward proxies are also utilized for security systems that are centralised as well as access that is permission-based, like at a workplace. When all internet traffic passes through an open forward proxy the administrator is able to grant just a handful of users connection to internet through the common firewall. Instead of creating security firewalls at the layer of clients that could include a variety of machines that have various environments and users A firewall can be positioned in this intermediate layer of forward proxy.




It is important to remember that forward proxy servers must be manually set up to use and reverse proxies may not be detected by the user. Depending on the type of IP address of the user, they are transferred to the server that is originally via the forward proxy Privacy and anonymity can be granted or denied.




There are many possibilities to think about when it comes to forward proxies.




Apache An open source well-known web server that offers forward proxy functions.


Nginx: Another widely used open-source webserver that comes with the ability to forward-proxy.


Squid: A no-cost forward proxy using the HTTP protocol. This doesn't offer the entire web server. Read our article on how to build a Squid proxy to connect privately on Ubuntu 20.04.


Dante is forward proxy which makes use of the SOCKS protocol instead of HTTP and HTTP, which makes it more suitable for applications like peer-to-peer communication. You can also learn how to set up Dante proxy to allow private connections with Ubuntu 20.04



Understanding Reverse Proxies



A reverse proxy acts as an intermediary for the web server which manages incoming requests from clients on behalf of. The web server could comprise one or more servers. Additionally, it can be an application-server, such as Gunicorn. In either of these scenarios the request will originate from the web in general. In the majority of cases, your request is sent directly to the webserver with the information the user seeks. Reverse proxy acts as an intermediary, isolating the webserver from direct interaction with the internet.




From the point of view of the user, the experience of using a reverse proxy is no different than connecting to an internet server direct. It's functionally the same however the user is unable to see the distinction. The client requests an item and receives it without extra configuration required from the client.




Reverse proxies offer features like:




Centralized security on webservers.


Controlling traffic that is incoming according to rules you have set.


New caching functionality has been added.




While central security is a benefit of both reverse and forward proxy servers. Reverse proxies offer this feature only to that layer on the webserver and not to clients. Instead of maintaining firewalls at the web server layer, which might contain many servers and various configurations, the bulk of firewall security is aimed at the reverse proxy layer. Additionally, removing the responsibility of working with a firewall and responding to requests from clients through web servers allows them to concentrate solely on the requirements of their clients.




In the case of multiple servers using reverse-proxies, the reverse proxy also handles the direction of which requests are directed towards which servers. There could be multiple web servers running within the same system, providing different types of resources or a mix of the two. They can utilize the HTTP protocol as a traditional web server, but they may also be able to be equipped with applications server protocols, like FastCGI. You can set up reverse proxy to direct users to a specific servers based on the services you request, or to a set of rules for the amount of traffic.




Reverse proxies may also benefit by being placed over web servers as they offer caching capabilities. Large static assets can be configured by using caching rules in order to avoid the need to call web servers each time you request. Certain solutions allow you to directly serve static files without having to communicate with the webserver even once. Additionally reverse proxy solutions are capable of handling compression of these assets.




The renowned Nginx web server also functions as an extremely popular reverse proxy option. Even though Apache is also an alternative to reverse proxy it is not the only one. Apache web server also has reverse proxy capabilities, however, it's a distinct feature to Apache unlike Nginx was initially designed for and is focused specifically on reverse proxy features.



Distinguishing Forward and Reverse Proxy Use



Since "forward" as well as "reverse" are associated with the notion of directionality, and false comparisons with "incoming" in addition to "outgoing" traffic, the labels could be confusing as the two types of proxies deal with both requests and replies. The most effective way to distinguish between forward and reverse proxy services is to consider the needs of the application you're creating.




A reverse proxy is a useful tool when you are developing a solution that can provide web-based applications over the internet. They are your web servers during any interaction on the web.




Forward proxy are useful when they are displayed in front of users for personal use, or in an office setting. They serve as a representation of the traffic of your client when you use the internet.




The practice of separating by use case, instead of focusing solely on standard naming conventions can help ensure that you aren't confused.



Conclusion



This article explains the meaning of a proxy with the two major types, namely the forward proxy and reverse proxy. Practical examples of use and an overview of useful features were utilized to distinguish between reverse and forward proxies. If you're looking to know more about the advantages of proxies, you should read our tutorial on how to configure Nginx as a web server and reverse proxy within Apache on one Ubuntu 20.04 Server.



If you have any queries about the place and how to use Proxy Sites [http://www.ontokem.egc.ufsc.br/], you can get in touch with us at our webpage.