Listen to Your Customers. They may Tell you All About Proxy Sites
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작성자 Tiffany 작성일 24-02-13 12:36 조회 10회 댓글 0건본문
A proxy or proxy server is a software that acts as an intermediary between a client and server via the internet. Without proxy, a user could send a request for an item directly the server, and then the server would serve that resource to its user directly. This method is simple to grasp and use but using proxies has advantages such as greater performance, privacy, security, among others. As an additional layer of being able to pass through, proxies function as a security layer for the internet, separating servers and clients.
It is generally accepted that the combined system of server hardware along with the software to install proxy servers is often referred to as proxy servers. But, this article will focus on proxy servers that are usually described in terms of software as well as those that are utilized in conjunction with web servers. We will present a summary of the two primary types of proxies: the forward proxy and the reverse proxy. Each has its own specific usage that can cause confusion due to a similar terminology.
This article will give you an idea of the how proxies work and what their subtypes are, as well as their utility in a variety of configurations. After reading the article you will know how to determine the situations in which a proxy is beneficial, and determine the most appropriate option to use a forward or reverse proxy depending on the situation.
Understanding Forward Proxies
Forward proxy also known as the open proxy serves as a representative for a user who attempts to connect online to a server. In this situation the entire request sent by the client will rather be directed by the forward-proxy. The forward proxy, in the place of the client, will scrutinize the request. It will first verify if the client has been authorized to transmit requests via this particular forward proxy. It will then reject an demand and then forward the request to an original server. The client has no direct access to the internet. It is able to access only the information that the forward proxy allows the client to connect.
The most frequent use of forward proxies is to provide greater privacy or security online. Forward proxy connects to the internet in place of a client, and in this process it utilizes an alternate IP address to the initial IP address of the client.
Based on how it has been configured according to the method of configuration forward proxy can provide a variety of functions dependent on the way it's configured. This allows you to:
Beware of ad-tracker.
Circumvent surveillance.
Identify restrictions based on your location.
Forward proxies can also be used in systems of centralized security and permission dependent access, such as, in workplaces. When all internet traffic is routed through an common forward proxy, an administrator can restrict access for only a select set of users to the internet, which is filtered through an common firewall. Instead of putting firewalls in place for the client layer which may comprise several computers with various environments and users, there is the possibility to install a firewall at the front proxy layer.
It is essential to note the fact that forward proxy servers have to be set up manually for be utilized, whereas reverse proxy servers may be hidden from clients. Based on the kind of IP address the client, it will be passed to the server which created it by the forward proxy privacy and security can be granted or left secret.
There are a myriad of choices to think about when it comes to forward proxy options:
Apache is a well-known open-source web server offering forward proxy capabilities.
Nginx: Another well-known open-source web server with forward proxy capabilities.
Squid: A free forward proxy that uses the HTTP protocol. This doesn't offer an entire Web server app. You can read our instructions on how to set up Squid proxy to allow private connections with Ubuntu 20.04.
Dante Forward Proxy that utilizes the SOCKS protocol instead HTTP, making it better suitable for applications such as peer-to -peer traffic. It is also possible to discover how to set up the Dante proxy to allow private connections on Ubuntu 20.04
Understanding Reverse Proxies
A reverse proxy is an agent for web servers that handle incoming requests by clients on behalf of. The web server could comprise a single server or several servers. Additionally, it could be an application server, such as Gunicorn. In any case, the request is made by an internet user generally. In the majority of cases, the request will be transmitted directly to the server which has all the resources the client requires. Contrarily reverse proxy acts as an intermediary and isolates Web server from direct contact with the internet.
From the consumer's point of view, interacting with reverse proxy is not any different from interacting with an internet server direct. It's the same thing, and the client cannot see the difference. The client requests it, then is then granted without additional configurations that need to be performed by the customer.
Reverse proxies provide features such as:
A central layer of security to guard the server.
Controlling traffic inbound based on rules you can establish.
A new feature to cache has been added.
While central security is an advantage of both forward and reverse proxies, reverse proxies provide this to only the server layer but not to the client layer. instead of maintaining firewalls at Web server layers which can contain many servers and different configurations, most security measures for firewalls are targeted towards the reverse proxy layer. Furthermore, taking the burden of interfacing with firewalls and communicating with customers who aren't connected to web servers permits the firewall to focus on addressing the needs of their clients.
In the case of multiple servers operating within a reverse proxy it also manages controlling which requests go to which servers. There are many web servers working on the same server, serving different kinds of resources or a combination of both. These servers use the HTTP protocol like a traditional web server. However, they could also be equipped with application server protocols like FastCGI. You can set up a reverse proxy to direct the clients towards specific servers according to the type of resource they are searching for, or follow certain rules regarding traffic load.
Reverse proxies also have the ability to benefit from their positioning ahead of web servers by providing caching functions. Large static assets are able to be configured with caching rules, so that you do not need to call web servers on every request. Some solutions offering an option to serve static assets directly without having to connect to the web server for even one time. Additionally reverse proxy solutions can manage compression of these files.
The popular Nginx web server can also function as an effective reverse proxy option. It is true it's true Apache webserver is also equipped with a reverse proxy that is a different option to Apache but Nginx was designed originally to and is primarily focused on the reverse proxy feature.
Differentiating Forward Proxy and reverse Proxy Examples
Because "forward" as well as "reverse" are associated with the notion of directionality as well as inaccurate comparisons with "incoming" and "outgoing" traffic. It could be confusing because both types of proxies handle requests and respond. The best way to differentiate between forward and reverse proxy services is to take into account the requirements of the app that you're developing.
A reverse proxy is useful when you're developing a solution to offer web-based services via the internet. They act as your servers when you interact with the Internet.
Forward proxy applications are advantageous when put in front of a client for your personal usage as well as in an office setting. They are your client's representative whenever you use the internet.
The use case-based differentiation instead of focusing solely on common naming conventions can assist in avoiding confusion.
Conclusion
This article clarified what a proxy is along with two types: the forward proxy and the reverse proxy. Practical applications and an exploration of the benefits were used to differentiate between reverse and forward proxies. If you're interested in learning more about the implementation of proxies we recommend you follow our guide on how to configure Nginx as a web server and reverse proxy with Apache on the Ubuntu 20.04 server.
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