Tuesday, August 13, 2019
Proxy Server
In general, proxy servers are used to secure private computer networks that are connected to public networks. So, from the proxy server, usually the server is placed between the server application with the client application, where the client application is a web browser, FTP client and others while the server application is an FTP server and a web server.
How Proxy Server Works
After understanding the meaning of a proxy server, of course we also need to know how the principle of how a proxy server works and why a proxy is needed.
From the understanding of the proxy server above we know that the proxy server acts as a liaison computer with the internet, then the way this program works is that the user uses the service on the proxy server and then requests data or files contained on the internet (public server). Then the proxy will forward the request to the internet as if the server requested it.
If the user has gotten the request, the proxy will respond to the user, as if he were the public server. In essence, here the proxy server can hide the identity of a person's or company IP address.
Proxy Server Function
From the explanation of the definition of proxy and how it works, then the following 3 main functions of a proxy server that must be known:
1. Connection Sharing Function
So if the company computer network embeds a proxy server program, it can access the gateway connection from the local network to the internet network simultaneously.
2. Filtering function
In this function, the proxy server acts like a firewall as a filtering media or filtering of an internet network where every packet of data that is transmitted will be scanned and filtered to reduce failure.
Another goal is also to protect the company's local network from outside attacks such as hacks. In addition, a proxy server can also help minimize harmful virus and malware attacks.
3. Caching function
The existence of a proxy server can store objects and data that have been searched or requested by users when browsing using internet applications. For example when you do a search on a particular site then the data will be stored in the form of cache.
All data requested and accessed will be stored on the proxy server. So that this function can be used to detect what documents are often accessed on the company's computer.
Benefits of Proxy Server
Apart from the main functions above, using a proxy server also has the following benefits for users:
1. Save Bandwidth
Proxy servers can be used to save bandwidth usage from the user's internet connection because of the caching process that stores cookies from sites that have been visited.
2. Improve Internet Performance
Proxy servers can help improve the performance of internet users because they have flexibility with bandwidth.
3. Blocking Certain Sites
The proxy server can automatically load sites that contain sara or unwanted sites with the filtering feature. Associated with these Benefits can avoid employees Opening banned sites through the local company's internet network.
4. Computer Network Security
As agreed at the beginning of the article, proxy servers can increase computer security from virus attacks and malware disturbances.
Although proxies are of great benefit to network security, they still lack proxy use. One that is often a misunderstanding of a site that is considered to be blocked by the server so that it needs to be done unblock manually.
5. Faster Internet Access
Still related to point # 2, proxy servers can improve internet performance. That way internet access will be faster.
Types of Proxy Servers
1. Anonymous Proxy
This is a type of proxy that provides information about the user's computer. When a user makes a request on a website, the website will not know the user's private IP address, only his IP address.
2. High Anonymity Proxy
This is a type of proxy that does not identify itself as a proxy server and does not provide an original IP address.
This proxy uses the REMOTE_ADDR header with an IP address to the proxy server, so the user will see that the proxy server acts as a client.
3. Transparent Proxy
This is a type of proxy that continues the user's request to the desired source without revealing the user's computer information. In general, this type of proxy is widely used on computers in offices.
4. Reverse Proxy
This is a type of proxy used to prevent clients connecting with sensitive data / information. And when caching on this type of proxy is activated then network traffic will decrease.
Web Proxy Usage
Web proxy is a server computer that can act as another computer. This web proxy serves to make requests for content from the internet and intranet networks.
Web proxy can do the following things:
1. Hide the computer's IP address
2. Access sites blocked by the ISP
3. Block access to sensitive or dangerous sites
4. Filter unwanted cookies
5. Increase the security and privacy of internet users
