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

A proxy or proxy server is software that acts acting as an intermediary for a client and server over the internet. Without the use of a proxy, users could send a request for the resource directly to a server, and the server will serve direct to the client. This method is simple to understand and use, the addition of proxies can provide advantages in the form of greater performance, privacy, security, among other things. As an additional layer passing through, proxies act as a security layer for the internet between servers and clients.




It is generally accepted that the combination of server hardware and the software used to install proxy services is commonly called proxy servers. This article will focus on proxy servers which are generally described as software, as well as those that are employed in conjunction with web servers. This article will provide a brief overview of the two primary types of proxies: those that are a one that is forward and a reverse proxy. Each has their own use that can cause confusion because of a similar language.




This article will provide you with an idea of the types of proxies and subtypes they are, as well as their benefits in a range of configurations. By reading in this post, you'll understand how to identify the scenarios where proxies are useful, and choose the best option to use a forward or reverse proxy depending on the situation.



Understanding Forward Proxies



Forward proxy also known in the context of open proxy. An open proxy serves as a representative for a user who is trying to make an online request to an source server. In this case, the whole attempt to send requests from the client will be controlled by the forward proxy. A forward-proxy, acting in its place as the customer, will review the request. First, it will determine whether the client has been granted permission to send requests using this particular forward proxy. It will then deny a application and send it back to its source server. The client is not able to have direct access for the web. It can access only the information that the forward proxy permits it access to.




The most frequent use of forward proxies is greater security or privacy on the internet. The forward proxy can connect to internet in place of a client, and as a result it utilizes an alternate IP address to the client's initial IP address.




Based on the way it is configured according to the method of configuration forward proxy can provide a variety of functions depending on how it's set up, allowing you to:




Avoid ad tracking.


Circumvent surveillance.


Identify restrictions based on your area.




Forward proxies can also be used in systems that rely on central security and permission based access, for instance in workplaces. If all traffic on the internet flows through a common forward proxy layer, the administrator is able to limit access to a specific user group to the internet filtered by a common firewall. Instead of keeping firewalls in place for the client layer which could comprise a range of computers with various environments and users, there is the possibility to have a firewall located at the front proxy layer.




It is essential to note the fact that forward proxy servers have to be manually configured for use, whereas reverse proxies may be hidden from clients. Depending on the type of IP address the client is passed on to the server which created it via forward proxy, privacy and security can be granted or left secret.




There are a variety of choices to think about for forward proxies




Apache The most well-known open source web server with forward proxy capability.


Nginx is another well-known open-source web server with forward proxy features.


Squid: A free forward proxy that utilizes the HTTP protocol. It doesn't provide a complete Web server app. You can read our instructions on how to set up Squid proxy to permit private connections with Ubuntu 20.04.


Dante Forward Proxy that utilizes the SOCKS protocol rather than HTTP, making it better for use in situations such as peer-to-peer traffic. It is also possible to discover how to set up the Dante proxy for private connections on Ubuntu 20.04



Understanding Reverse Proxies



A reverse proxy functions as a representative of web servers that handle the incoming requests of clients on its behalf. The web server may comprise a single server or a number of servers. It could also serve as an app server, such as Gunicorn. In any case, the request is made by users on the internet in general. Most of the time the request will be transmitted directly to the web server, which is equipped with all the resources the client in need of. In contrast, a reverse proxy works as an intermediary that isolates Web servers and their direct interaction with the open internet.




From the consumer's point of the consumer's perspective, working with reverse proxy is not any different than interacting with an online server direct. It's the same thing, and the client cannot discern the distinction. The client makes a request for this resource and it receives it without extra configuration that must be performed by the customer.




Reverse proxies can provide features such as:




A central layer of security to guard the server.


Controlling traffic inbound based on rules you can create.


A new feature to cache is now available.




While centralized security is an advantage of both reverse and forward proxy, reverse proxies do this feature only to the server layer but not the client layer. Instead of establishing firewalls on Web server layers, which could include multiple servers and various configurations, the bulk of security for firewalls is focused on the reverse proxy layer. Furthermore, taking the burden of interfacing with firewalls and communicating with clients that are not web servers permits the firewall to focus on delivering the needs of their clients.




If there are multiple servers operating within reverse proxy, it determines which requests are sent towards which servers. A number of web servers could be operating on the same server, providing different types of resources or a mix of both. They use the HTTP protocol like a traditional web server. They can also be equipped with applications server protocols like FastCGI. It is possible to configure reverse proxy servers to guide the clients towards specific servers according to the type of resource they are seeking, or to follow certain rules regarding traffic load.




Reverse proxies can also be able to gain advantage from their position prior to web servers, through providing caching functions. Large static assets are able to be configured using caching rules, so that you do not need to connect with web servers on every request. Certain solutions offer the option to deliver static files directly without having to contact the web server even once. In addition reverse proxy is able to manage compression of these files.




The popular Nginx web server can also function as a reliable reverse proxy solution. Although it is real that the Apache webserver is outfitted with a reverse proxy, it can be used in conjunction with Apache but Nginx was initially designed to and is primarily focused on the reverse proxy feature.



Differentiating Forward Proxy and Reverse Proxy Use Examples



Since "forward" as well as "reverse" come with connotations of directionality and inaccurate comparisons with "incoming" and "outgoing" traffic. It can be confusing as both types of proxy services process requests and response. An alternative approach to distinguish between reverse and forward proxy service is to consider the needs of the application that you're developing.




A reverse proxy is a great option when you are developing a solution to offer web-based services via the internet. They function as servers in any interactions through the Internet.




Forward proxy software is beneficial when it is presented to the user for personal use as well as in an office environment. They are your client's representative when you interact with the internet.




The use case-based differentiation instead of focusing solely on common naming conventions can assist you to avoid confusion.



Conclusion



This article defined the definition of a proxy along with two kinds: forward proxy and reverse proxy. Practical applications and an exploration of beneficial features were used to distinguish between forward and reverse proxies. If you're interested in learning more about the implementation of proxies then you should follow our guide on how to configure Nginx as a web server and reverse proxy on Apache using one Ubuntu 20.04 server.



Should you loved this short article and you would like to receive more details relating to Proxy Sites (https://www.mymeetbook.com/OESRP123) kindly visit the web-site.