NET SEND
Net Send command is used to send messages to other users, computers, or messaging names on the network. The Messenger service must be running to receive messages; it is automatically enabled when you install windows. You can send a message only to a name that is active on the network.
Messenger Services can be used to send advertisements and spam to vulnerable machines on a network. A box will pop up on your screen with the text “Messenger Services” at the top, but the text will be an ad for a product or service interrupting whatever you’re doing on the computer at the time.
To make sure this doesn’t happen to you, just take the following steps:
Windows 2000
1. Click Start -> Programs -> Administrative Tools -> Services
2. Scroll down and highlight “Messenger”
3. Right-click the highlighted line and choose Properties.
4. Click the STOP button.
5. Select Disable or Manual in the Startup Type scroll bar
6. Click OK
Windows XP
1. Click Start -> Control Panel
2. Click Performance and Maintenance
3. Click Administrative Tools
4. Double click Services
5. Scroll down and highlight “Messenger”
6. Right-click the highlighted line and choose Properties.
7. Click the STOP button.
8. Select Disable or Manual in the Startup Type scroll bar
9. Click OK
Net Send Command
Net Send {name | * | /DOMAIN | /USERS} Message
Name Is the username, computer name, or messaging name to send the message to. If the name is a computer name that contains blank characters, enclose the alias in quotation marks (” “).
* Sends the message to all the names in your group.
/DOMAIN Sends the message to all the names in the workstation domain. If name is specified, the message is sent to all the names in the specified domain or workgroup.
/USERS Sends the message to all users connected to the server.
Message Is text to be sent as a message.
