The No. 1 Proxy Sites Mistake You're Making (and 4 Ways To fix It) > 자유게시판

An proxy or proxy server. It is piece of software which acts as an intermediary for 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 serve the resource directly back for the client. This method is simple to understand and implement, but the addition of proxy servers could bring benefits such as increased performance as well as privacy, security and many more. In addition to providing passing through, the proxy acts as a guardian for the internet between servers and clients.




The combined system of server hardware and installed proxy software is also often called a proxy server. This article will discuss proxies typically classified as software, and in the context of web servers. There will be a discussion of two kinds of proxies. One being forward proxy and the other being a forward proxy and the reverse. reverse proxy. Each type has its own application, and is frequently confused due to the resemblance of namesake convention.




This article will give you an idea of the different subtypes and proxies, as well as their value for common setups. If you've read this article, you'll understand the situations when the use of proxies is advantageous and choose the most appropriate option between reverse proxy and forward proxy depending on the circumstance.



Understanding Forward Proxies



Forward proxy, also known as open proxy. An open proxy acts as the representative of a customer who wants to send an internet request to an the server which originated it. In this situation any attempts to send requests from the client's side will be routed directly to forward proxy. The forward proxy, instead of the client, will examine the request. First, it will find out if the client is allowed to receive requests from this specific forward proxy. It will then deny any request or forward it to its origin server. The client is not able to have an internet connection directly It can only access what the forward proxy allows it to access.




The most popular reason for using forward proxy servers is the increased privacy or anonymity on the internet. Forward proxy connects to the internet as clients and in this way, it could utilize an IP address that is different from the IP address of the client.




Depending on the way it's configured the forward proxy will give you a range of options and the capability to:




Beware of Ad-trackers.


Circumvent surveillance.


Find restrictions based on your area.




Forward proxies also are utilized in systems that provide centralized security as well as access to users based on permissions, for instance in a workplace. All internet traffic can pass through a forward proxy Administrators are in a position to grant only specific clients access to the internet using a common firewall. Instead of putting firewalls installed to protect the client layer which could include multiple machines with different settings, users and environments the firewall is put in an forward proxy layer.




It is crucial to keep in mind to set forward proxy preferences have to be set up manually to permit the forward proxy to function in order to be used in reverse proxies, whereas forward proxy settings are not able to be detected by the user. Based on your IP address a user is transmitted to the origin server via the forward proxy privacy and security can be granted or kept in the dark.




There are numerous options to think about when it comes to forward proxy options:




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


Nginx Another well-known open-source web hosting server with forward proxy functions.


Squid is a free forward proxy that utilizes it's HTTP protocol. It's not the full webserver system. It is possible to refer to our article on the best method to set up 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 such as peer-to-peer communication. You can also check out how to configure Dante proxy for secure connections within Ubuntu 20.04



Understanding Reverse Proxies



Reverse proxy serves as an intermediary between web servers and handles requests from clients on behalf of. The web server can serve as a single server or as a series of servers. Additionally, it can serve as an application server such as Gunicorn. In all cases, the request for an application comes through the internet. Most of the time, the request will go directly to the server that hosts the content that the client is trying to find. Reverse proxy, however, serves as a middleman to protect your website server from communication to the open internet.




From a consumer's point of perspective, using reverse proxy doesn't differ from communicating with your webserver directly. It's basically similar, however the client cannot tell the distinction. Client makes a request for an item, and is given it, without requiring any additional configuration from the user.




Reverse proxy providers provide features like:




The web server is secured centrally.


Sending traffic to be directed according to the rules you establish.


Added functionality for caching.




While centralized security can be a benefit of both reverse and forward proxy, reverse proxies provide this feature only to just the Web server layer and not the client layer. Instead of maintaining firewalls on Web server layers that may comprise multiple servers that have different configurations, the majority of firewall security is directed at the reverse proxy layer. In addition, taking the burden of interacting with a firewall and interacting with requests from clients off web servers enables them to focus on serving resources.




In the case of multiple servers that have a reverse proxy, the reverse proxy is also accountable for deciding what requests go at which server. There could be multiple web servers operating on the same server, all serving different kinds of resources or a mix of both. They could be using the HTTP protocol similar to a conventional web server. They may also use application server protocols like FastCGI. It is also possible to configure a reverse proxy to route the clients towards specific servers based on the service they require, or to observe certain traffic load rules.




Reverse proxies also can take advantage of their placement over web servers by making use of caching. Large static assets can be set up using caching rules to prevent hitting web servers with every request, with some options even allowing users to upload static files in a direct manner without linking directly to the website server. In addition, the reverse proxy is able to handle compression of these files.




The popular Nginx web server has become a well-known reverse proxy solution. While it's not a reverse proxy, the Apache web server comes with the reverse proxy function as an added feature that is available to Apache whereas Nginx was originally designed to and is focused on the reverse proxy feature.



Differentiating Forward Proxy from reverse Proxy Use Cases



Because "forward" along with "reverse" are associated with the notion of directionality and also inaccurate comparisons to "incoming" in addition to "outgoing" traffic. These labels can be confusing because both types of proxies can be used to manage requests and responses. An alternative method to differentiate between reverse and forward proxy servers is to study the specifications of the software you're creating.




Reverse proxy can be a valuable tool when you are developing a solution to serve websites on the internet. They represent your web servers during any interaction through the Internet.




Forward proxy is a great tool to have in front clients to use for personal purposes, or even in a business environment. They represent your client traffic when you interact with the internet.




A distinction based on usage cases instead of using the standard name conventions can aid you in avoidance of confusion.



Conclusion



The article explained what a proxy is as well as two types of them: the forward proxy and reverse proxy. Examples of how to use them and a discussion of the most useful features were used to distinguish forward proxies and reverse proxies. If you're interested in learning how to set up proxies, we suggest that you read our tutorial on how to set up Nginx as an internet server and reverse proxy using Apache using the Ubuntu 20.04 server.



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