The Advantages Of Proxy Sites > 자유게시판

An proxy also referred to proxy servers is software that acts as a mediator between a client and server over the internet. Without a proxy, an individual would send a request to the item to an online server and the server would deliver the resource directly back to the user. Although this method is easy to comprehend and implement the addition of proxy servers can provide advantages in terms of increased performance, privacy, security, and many more. In addition to adding a layer of security proxy servers also act as a security safeguard for the internet, separating clients from servers.




The general consensus is that the set of server hardware along with installed proxy software are also called proxy servers. But, this article will concentrate on proxies which are usually classified as software, and in the case of web servers. We will provide a brief overview of the two main types that are forward proxy and a reverse proxy. Each has its own usage and can be confusing due to the same name convention.




This article will give you an idea of the proxy's purpose and what their subtypes are and how they work in the typical setups. By reading this article, you'll learn to identify the scenarios that are the best to utilize a proxy and make the right choice between reverse proxy and forward proxy in any circumstance.



Understanding Forward Proxies



In the same way a forward proxy, also called or an open proxy is a proxy of a user who would like to send an internet request to an origin server. In this scenario every request made by the client will instead be sent direct to the forward proxy. The forward proxy, acting in the instead of the user, will examine the request. It will first determine if this client has the right to receive requests from this specific forward proxy. It then decides whether to refuse a request or send it back to the server that originally received it. The client is unable to have direct access to the internet. It can only access what the forward proxy grants its access.




The most common reason to use forward proxies is to improve privacy or security on the internet. Forward proxy allows you to connect to the internet in instead of a client and as such it could use a different IP address than the IP address originally utilized by the client.




Depending on how it's been set up in the past forward proxy servers may offer a wide range of options and allow you to:




Avoid ad tracking.


Circumvent surveillance.


You can determine limitations based on your geographical place of residence.




Forward proxies are also utilized in systems that offer central security and permission-based access, for example, in the workplace. When all traffic on the internet passes via an open forward proxy layer, administrators can restrict access to only certain clients to the internet filtered through an common firewall. Instead of having firewalls in place for the client layer that could comprise a variety of computers with different environments and users, the firewall could be placed within the forward proxy layer.




Be aware that forward proxy settings have to be manually configured for use to use, while reverse proxy settings are not recognized by clients. Based on whether the IP address of the client is passed to the original server via the forward proxy, privacy and anonymity can be granted or denied.




There are several possibilities to consider for forward proxies:




Apache: A popular open-source web server that has forward proxy features.


Nginx: Another renowned open-source webserver with forward proxy features.


Squid: A free forward proxy that uses an HTTP protocol. Squid isn't a complete internet server. Take a look at our step-bystep guide to create Squid proxy to permit private connections within Ubuntu 20.04.


Dante forward proxy, which uses using the SOCKS protocol instead of HTTP this makes it more suitable for situations like peer-to-topeer connections. You can also examine how you can install the Dante proxy to connect privately in Ubuntu 20.04



Understanding Reverse Proxies



A reverse proxy serves as a representative of web servers that handle any requests that come in from clients on its behalf. Web servers can comprise one server or several servers. Additionally, it can serve as an application server such as Gunicorn. In any of these situations, the request for an application comes by a user on the internet in general. In most cases, the request will be sent directly to the web server along with the information the client is asking for. A reverse proxy acts as an intermediary, shielding Web server from any direct interactions with the public internet.




From a consumer's point view that is a user's viewpoint, interfacing with a reverse proxy is identical to working with direct connections to an internet server. It's exactly the same however the client is unable to discern the distinction. The client requests the resource, and is then provided with it, without any additional configuration required by the client.




Reverse proxies offer features like:




Secured centrally to protect Web Server Layer.


Controlling traffic that is inbound, based on rules you can create.


The caching function was added to the application.




While centralized security is an advantage of both forward and reverse proxy servers, reverse proxies provide this feature to only the server layer, it is not available to the client layer. Instead of managing firewalls on Web server layers which could contain multiple servers with different configurations, most of the firewall security is targeted at the reverse proxy layer. Furthermore, the elimination of the responsibility of interfacing with a firewall as well as dealing with clients' requests outside of web servers permits them to concentrate on serving the requirements of their clients.




When there is a multitude of servers hosted by a reverse proxy, the reverse proxy is also responsible for directing which requests go at which server. There could be multiple web servers providing the same content, offering various types of resources or a mix of both. These servers can be using the HTTP protocol in the same way as a traditional web server, however they could also include different protocols for application servers such as FastCGI. It is also possible to set up a reverse proxy to redirect clients to specific servers in accordance with the resource requested or to adhere to specific rules for traffic load.




Reverse proxies also can make use of their location ahead of web servers, by providing caching capabilities. Massive static resources can be configured by using caching rules in order to avoid hitting web servers with every request. There are even solutions that allow the server to serve static assets directly without connecting to the web server even once. Furthermore reverse proxy solutions can handle compression of these assets.




The well-known Nginx web server also functions as an extremely popular reverse proxy service. Although Apache is also a reverse proxy service however, Apache is a reverse proxy service. Apache web server also comes with a reverse proxy functionality as an additional feature of Apache however Nginx was designed initially to focus on the reverse proxy feature.



Differentiating Forward Proxy and Reverse Proxy Examples



Because "forward" or "reverse" have connotations of directionality, as well as false comparisons to "incoming" and "outgoing" traffic the labels could be confusing, since both types of proxy handle responses and requests. The best way to distinguish between forward and reverse proxy is to study the requirements of the program that you are building.




Reverse proxy is helpful when building a web-based applications over the internet. They serve as your web servers for when you use the internet.




Forward proxy can be useful when it is displayed in front of clients to use for personal reasons or in the corporate setting. They represent your clients whenever you use the internet.




The use of case-based differentiation instead of focusing on commonly used naming conventions can help in avoiding confusion.



Conclusion



The article clarified the meaning of a proxy with the two kinds: the forward proxy and reverse proxy. Practical applications and a discussion of the beneficial characteristics were employed to identify between reverse and forward proxies. If you're interested in knowing more about how to implement proxy services, check out our guide on how to configure Nginx as a reverse and web server proxy with Apache using Ubuntu 20.04. Ubuntu 20.04 server.



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