Netsend (historically net send) is a legacy command-line tool used in older Windows operating systems to send messages to other users or computers on a local network. In modern Windows systems, this functionality has been replaced by the msg command.
Here is how to enable, use, and troubleshoot network communication for both versions. Modern Alternative: The MSG Command
Because net send was removed after Windows XP, modern Windows networks use the msg command.
Basic Syntax: msg /server:ServerName Username “Your message” Send to Everyone: msg/server:ComputerName “Hello Team”
Registry Prerequisite: The receiving machine must allow remote messages. Open regedit.
Navigate to HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server. Change AllowRemoteRPC value data to 1. Restart the computer. Enabling Legacy Netsend (Windows XP / 2000)
If you are working on a legacy environment, net send relies strictly on the Messenger service and NetBIOS.
Start the Service: Open services.msc, locate Messenger, change startup type to Automatic, and click Start. Enable NetBIOS: Open Network Connections →right arrow IPv4 Properties →right arrow →right arrow →right arrow Click Enable NetBIOS over TCP/IP. Troubleshooting Network Communication
If your network messages are failing to send or receive, follow these steps to isolate the issue:
Check Windows Firewall: Blocked ports are the most common cause of failure. For msg, allow TCP Port 445 (SMB/RPC).
For net send, allow UDP Ports 137 and 138, and TCP Ports 139 and 445. Verify Network Discovery: Go to Network and Sharing Center →right arrow Advanced sharing settings →right arrow Turn on network discovery.
Test Basic Connectivity: Run ping [Target_IP] in the command prompt to ensure the machines can see each other.
Match Credentials: The sending user account often needs administrative privileges or valid access permissions on the target computer. To help narrow down the issue, let me know: What Windows version are you currently operating on?
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