Explore the disappearance of Telnet components in Windows 7

Telnet is one of the most commonly used remote management tools for system administrators. In previous versions of Windows, you only need to run services.msc to open the service management, and the startup service can be used. However, in Windows 7, the Telnet service could not be found. It seems that Telnet has become obsolete due to security issues and has become a component that Windows 7 abandoned. So is it really we can't use it anymore? Of course not. Abandoning a component is a matter of slowness. In Windows 7, Telnet is only downgraded. There is no default installation and it becomes an optional component.

In fact, Windows 7 as a client system, it is not surprising to exclude Telnet from the default components of the system. If we really need it, just do a simple installation. However, installing Telnet and Windows Server 2008 under Windows 7 is slightly different. The operation is as follows:

Add Telnet client to the image

Click "Start" → "Control Panel" → "Program", "In Programs and Features" find and click "Open or close Windows function" "Enter the Windows Function Settings dialog. Find and tick "Telnet Client" and "Telnet Server".

Telnet function startup

In addition, we can also install "TFTP client", "Internet information service", etc. through this wizard, but this does not seem to make much sense. Just as some people like to think about installing an Oracle database in Windows 7, why bother? After the Telnet service is installed, it is disabled by default. You need to start the service through Services.msc.

People know that the Telnet connection is displayed in plain text, there are serious security problems, but in order to facilitate the occasional use of this service, you can combine with Windows Firewall, just click "Start" → "Control Panel" ”→“System Security”→”Windows Firewall”→“Advanced Settings, enter the Firewall Settings window.

Telnet Service Startup

Click “Inbound Rules” in the left pane, In the middle pane, find "Telnet Server", right click on the rule and select "Properties" to enter its property settings window. Click on the "General" tab, we can see that the firewall allows all Telnet connections by default. We choose "Allow the Connection if it is sevure, then you can customize the security rules. Click on the "Computer" tab, under which you can set up the computer and exception computer that authorize Telnet connection. Click on " Scope" tab, under this tab we can set the local and remote IP to control the Telnet connection. Click on the "Users" tab, Under this tab we can add users who can remotely Telnet.

Although Telnet is not very secure, it is a very convenient tool, and Windows Security Firewall has improved its sense in a certain sense. Security.