What Is A Proxy Server

Technology Posted at : June 29, 2021

What Is A Proxy Server

A proxy server connects to the Internet, responds to it and receives traffic from the Internet by changing the origin address of traffic coming to it and passes it through the Internet on behalf of the client computer or NAT device. [Sources: 9] 
    
A proxy is the user's local computer and its target server on the Internet. When you connect, you can connect from an external host to a specific website, video streaming app or file-sharing program. Whether you connect to your laptop, tablet, smartphone or other device, you connect to a proxy. [Sources: 2, 15] 
    
If you use a proxy server, Internet traffic flows to the address you requested via the proxy server. When you request the return of data to your Internet request on the Web and on other servers, the proxy address will return the data to you. If a request comes through a proxy server, there are exceptions to this rule, but because the server is a proxy, the data from the website are received from where you are located. [Sources: 12, 13] 
    
An anonymous proxy server, also known as a web proxy, attempts to anonymize Internet surfing. Internet resources such as web pages are returned to the proxy server, which refers to how they were requested, not how they themselves are for the user. A proxy server is invisible to the user, and an Internet request is returned in response that appears to come from a different address on the Internet server. [Sources: 3, 6] 
    
A proxy server is a dedicated computer or software system located at the end of a client (such as a desktop computer or mobile device) and in a desired destination such as a web site, server or web-based application. By acting as an intermediary between the client and the destination, a proxy shields the client's IP address from the destination and provides a level of privacy. The target server is the server that responds to the web request and receives the request from the anonymous proxy server (sometimes referred to as the web proxy) and does not receive information about the end user's address. [Sources: 6, 8] 
    
A proxy server is a server or application application that acts as an intermediary between a client's request for a resource and the server providing the resource in computer networks. Proxy servers prevent attackers from infiltrating private networks and are one of several tools used to build a firewall. The word proxy means "do on behalf of" and proxy servers act on behalf of users. [Sources: 6, 14] 
    
Forwarded proxy servers provide full administrative control over the local network connection. They act as a shield or firewall, which allows administrators to restrict access to unwanted web resources and internal network clients. All requests from the Internet go through the proxy server, which evaluates the request as it is. [Sources: 10, 14] 
    
A forward proxy server or reverse proxy server operates on the side of a website or web service to hide the IP address of the internal network from external users. [Sources: 10] 
    
Reverse proxy services provide an additional level of abstraction and control and support a smooth flow of network traffic between clients and servers. They also provide increased security by implementing traffic filters that make it impossible for external users to gain direct access to an organization's servers. The use of reverse proxies allows a company page to be served by multiple servers that appear to be from the same machine. [Sources: 0, 1] 
    
Proxies are used as a security mechanism to scan and filter harmful HTTP content from unsecured websites before it reaches your computer or smartphone. When websites are blocked or distorted, proxies prevent end users from accessing the websites they need. Data centre proxies are not connected to an Internet Service Provider (ISP), but are provided by companies as data centres. [Sources: 5, 7] 
    
Proxies protect web servers from all kinds of client-side cyber attacks, including DDoS attacks and exploits such as buffer overflows. Businesses use them for security and network performance, private individuals for privacy reasons and there are some cool features you can tap into by using a proxy server for your Internet browsing which we will talk about below. Examples of web proxy servers are Apache mod proxy, Traffic Server, HAProxy, IIS (configurated for proxy request routing), Nginx, Proxy, Squid, Varnish, Reverse Proxy, Wingate, Zipxy, TinyProxy, Rabbit and Polipo. [Sources: 6, 7, 11] 
    
You can set up a proxy on your home computer or deploy one in the cloud. If your computer is connected to a local network protected by an Internet firewall, you must specify a proxy server that uses FTP or passive mode (PASV) to access Internet pages. [Sources: 4, 11] 
    
A proxy VPN protects your identity A virtual private network (VPN) encrypts your data while you surf the Internet. This means that it helps to hide your online activities from hackers, government agencies and companies that want to know how you spend your time on the Internet. This data flow means that no server can log a user's Internet history, putting privacy and security at risk. [Sources: 1, 2] 
    
Proxies can also log their interactions, which can be helpful in troubleshooting. For example, an HTTP proxy can intercept web access, while an SMTP proxy can intercept e-mail. [Sources: 3, 9] 
    
A proxy server works like this: When a proxy server receives a request for an Internet resource like a web page, it takes its local page cache into account. [Sources: 3] 
    
A forward proxy is sitting in front of the client and is used to receive data from a group of users on an internal network. Forward proxies are well suited for internal networks that require a single entry point. They ensure the security of IP addresses in the network and enable simple administrative control. [Sources: 5] 
    
The IP address of the original client can be used to debug statistics and generate location-specific content. If a proxy makes a request appear as if it came from the IP address of the proxy. This can be useful when the proxy is used to ensure anonymity of the client, but in other cases the original request is lost information. [Sources: 15] 
    
You make your internet activity look as if it comes from another place. Websites communicate with your browser to see what your computer is doing and talk to it. They can block websites that distract employees from important tasks. [Sources: 5, 7, 11] 
    

    

        
    

##### Sources #####
    
[0]: https://www.nginx.com/resources/glossary/reverse-proxy-server/
    
[1]: https://www.checkpoint.com/cyber-hub/network-security/what-is-a-proxy-server/
    
[2]: https://us.norton.com/internetsecurity-privacy-proxy-vs-vpn.html
    
[3]: https://whatis.techtarget.com/definition/proxy-server
    
[4]: https://support.apple.com/guide/mac-help/enter-proxy-server-settings-on-mac-mchlp2591/mac
    
[5]: https://www.fortinet.com/resources/cyberglossary/proxy-server
    
[6]: https://en.wikipedia.org/wiki/Proxy_server
    
[7]: https://www.avast.com/c-what-is-a-proxy-server
    
[8]: https://www.paloaltonetworks.com/cyberpedia/what-is-a-proxy-server
    
[9]: https://kb.iu.edu/d/ahoo
    
[10]: https://dzone.com/articles/what-is-a-proxy-server-and-how-do-proxies-work
    
[11]: https://www.freecodecamp.org/news/what-is-a-proxy-server-in-english-please/
    
[12]: https://www.varonis.com/blog/what-is-a-proxy-server/
    
[13]: https://www.avg.com/en/signal/proxy-server-definition
    
[14]: https://www.pcmag.com/encyclopedia/term/proxy-server
    
[15]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Proxy_servers_and_tunneling
    

 

 

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