1. What is proxy?

Proxy or Proxy Server is known as the door to connect users and the Internet. It is a computer system or a router that is separated, used to connect the sender and the receiver. The proxy has its own IP and a fixed access port, of course, it must be different in each locality and each country.
When using the proxy server, all Internet traffic will be transmitted through the server and then to the required addresses. This requirement will return to the server and the server to transfer data received from the website to the user.
Not only continues web requirements, proxy also perform data security and increase network performance. It acts as a firewall and a web filter, providing network connections and cache data to accelerate the requirements. Each proxy server will protect users and internal networks from bad agents from the Internet.

2. Features and operation of proxy server

2.1 Firewalls and filtering

Proxy works in Application – 7^th layer in the OSI model that supports the application of applications independently. If properly configured it will help improve the security and performance issues for the Internet. At the same time, the proxies are likely that conventional firewalls cannot provide.

2.2 Share connection with proxy server

Proxy is considered a solution that provides expansion and efficiency in Internet access. Instead of assigning each customer with a direct internet connection, in this case all connections inside will be given through one or more proxy servers and in turn these signals will be connected to the destination.

2.3 Proxy server and caching

Currently, there are 3 forms to caching of websites to improve the service quality of a network, specifically:

• Network bandwidth and enhance expansion.
• Upgrade feedback ability for guests.
• Proxy Server cache can increase service capacity with even original access or intermediate network links while offline.

3. How does proxy and server proxy operate?

Basically, each computer will connect to the Internet to its own IP address, when sending a web request, that request will be transferred to the proxy server. Here, the data will be processed and fulfilled by the system to receive and collect feedback from the web server and return to the website. Finally, the website data is returned and you can see the results displayed on the website in the browser.
In addition, the proxy server can also change the IP address to the web server not knowing the exact position of the machine. Proxy can also encrypt data so that no one can read data when shipping. In addition, proxy servers can also block access to specific websites based on IP addresses.

4. Benefits of using proxy or proxy server:

4.1 Private:

Proxy servers can change IP and identifying information when sending requests. Therefore, the purpose of the purpose will not know who has made the request, thereby helping the personal information and the web browsing habit is kept tight.

4.2 Control:

Another advantage of using proxy or proxy server is that the content of the user will be guaranteed very high safety.

4.3 Speed up and save bandwidth

Effective use of proxy server helps the total network have better performance. In addition, it also stores popular websites to save bandwidth.

4.4 Access to blocked content:

Proxy servers allow users to access certain websites. However, if you use a proxy that can change the IP address, you absolutely will access the websites easily blocked.

4.5 What is the level of Proxy security?

Users can configure server server to encrypt web requirements not for third parties to know their activities. It is possible to block the software or website that is not cool to access through the proxy server. It is possible to connect the proxy server to VPN to help users access the internet remotely via proxy.

5. Risks when using proxy or proxy server:

Every problem has two sides. Similarly, when using proxy, in addition to the benefits that it provides, I have also faced certain risks such as:

• Slow speed: For websites stored before. Caching proxy will help improve loading time. However, for new access websites, the proxy will slow down that connection.
• Unstable: The use of free proxies also brings many shortcomings such as service interrupted, sudden disconnected or almost no high capacity.
• Limiting security problems: Although the IP address may be hidden with firewalls, there are still cases where the traffic can not encrypt traffic when the user’s activities may be monitored.
• Limitation: Only a proxy can be applied to all devices because the proxy does not work according to each application facility. This is quite inconvenient, difficult in many cases

6. Classify Proxy Server

Proxy server is classified into 4 types:
– Transparent proxy
– Antonymity Proxy
– Distorting proxy
– High anonymity proxy

6.1 Transparent proxy:

As a transparent proxy, it will show websites that it is a proxy server and still use your IP address, determine the web request. Units often choose transparent proxy to filter content because it is easy to set the name of the customer and the server.

6.2 Anonymity proxy

Antonymity Proxy, also known as anonymous proxy, will not transfer your IP address to the website. This helps increase security, prevent identity theft. Also keep your web browsing habits in private mode. They can also prevent the marketing website that is targeted based on your location.

6.3 Distorting proxy

Also known as Proxy impersonation, it performs the same function as anonymous server by sending the wrong IP address to the web server, which helps access the content that is blocked easily.

6.4 High anonymity proxy

High anonymity proxy server (high anonymous proxy) regularly changes the IP address when appearing on the server of the website, making it difficult to monitor the traffic of AI. High anonymous proxies are like a very private Tor network and ensure safety when using the Internet.

7. Why should use proxy or proxy server?

There are many reasons for organizations and individuals to use Proxy servers:

• Control the use of Internet: With the inherent security mechanism of proxy, the monitoring of internet access of strangers on the family’s internal network, the agency will be pushed up very high. Proxy can completely block unsafe access from the outside.
• Save bandwidth and improve speed: To help speed up access and save bandwidth, proxy servers have produced cache with extremely good backup. Can receive and handle hundreds, thousands of hits at the same time.
• Privacy: Users can be assured of privacy when using because the Proxy server configuration allows the encryption of the Wed, avoiding the fact that people can see transactions of the user. Besides, Proxy servers also prevent malicious websites to users.
• Access to blocked resources: Users can access blocked Wed pages via proxy servers. In addition, users can completely log into proxy servers on other channels and exploit resources from there.

8. Notes when using proxy server

Although quite useful, the proxy server still has some limitations such as:

• Traceability speed is slower than reality: This situation occurs because the access must be via proxy servers instead of direct access.
• The risk of being attacked: In fact, there are a number of proxy servers created by hackers to serve bad purposes. Therefore, if you accidentally use this server, the risk of being attacked is very high.
• There may be a different proxy for each ritual: because the proxy server is required to understand the ritual to determine whether the actions are allowed or not. Therefore, sometimes, you need a proxy for each specific ritual.
• When there is no proxy for a new service, it is difficult for you to put them into the system. At this time, the most optimal way is to place it outside the firewall. Because if placed in the system, it can become a security hole.

These are notes when using Proxy Server:

Risks from free-using

There are many free proxy server service providers. But these free service providers are not for the community. In some cases, they pretended to provide proxy server service providers and try to filter payment information, steal credit cards when you use it.

Security issues

The use of a free proxy also leads to high security. Suppliers will also not pay attention to issues related to the security for users.

Unencrypted

When using no encryption proxy server, anyone can see your pure text required. If you want, they will steal this information and make you angry for losing money.

9. What is the difference between Proxy and NAT?

10. What is the difference between proxy and VPN?

The biggest difference between VPN and proxy is encryption. VPN possesses professional security and protection features, so hiding your IP address is extremely perfect.
When users connect VPN clients on the device to VPN Server, all traffic will be encrypted. All information will be different security and encrypted at a fairly complicated level.
With proxy, the internet activities of users will not be hidden because the proxy has no encryption. The browser is where Proxy performs function, while VPN performs functions at the firewall. Proxy only hides the IP address, while VPN offers more location options for users.

11. Instructions for installing free proxy

11.1 Installing proxy for Firefox

• Step 1: Open the menu section on the toolbar and select the Option.
• Step 2: Move down to the last, select Tap Connection Setting, then continue to select Manual Proxy Configuration.
• Step 3: Fill in the following information about the IP address, port of HTTP Proxy Server or HTTPS Proxy.
  

11.2 Proxy installation for Chrome

• Step 1: Open the Chrome browser, click the settings.
• Step 2: When the installation window appears, click the advanced settings. Then move to the bottom.
• Step 3: Click on the Proxy Settings Change. Finally, click Connections and click Lan Settings to complete.
  

11.3 Proxy settings for antidetect browser

For Proxy: HTTP, Socket4, Socks5 Proxy.
Enter proxy with IP format: port: user: pass. You can check your proxy details including location, country, time zone, … by clicking on the proxy test.

For Free Proxy:
In the “proxy” section, the “Connection type”, select “Free Proxy”, in the “location” section, select the country you want to fake proxy, then click “Get proxy”

The above article is what sharing about proxy as well as information related to the proxy that you need to find out. Proxy or proxy server is a familiar concept for network administrators. However, for a regular network user, it is also easy to understand the concepts, characteristics and how to install proxy for your computer. Hopefully, through this article, we could help you to understand what proxy is with how to use proxy effectively.