![]() ![]() This article describes the fixes that are available for issues that can occur in Remote Desktop Services in Windows Server 2016 environments. In addition, the Alerter service uses Messenger to send administrative alerts to network subscribers.This article introduces the recommended hotfixes and updates for Remote Desktop Services in Windows Server 2016.Īpplies to: Windows Server 2016 Original KB number: 4039839 Summary Messenger service can be used by either Net Send command from a command-line interface. (NetBIOS is not installed with Windows 2000. ![]() In Windows NT 3.5, NT 3.51 and NT 4.0, Messenger used the older NetBIOS protocol. If access to the ports from outside a network is not blocked, it can lead to the aforementioned spam issue. It requires UDP ports 135, 137, and 138 and TCP ports 135, 139, and 445 to work. The alternative way to send a message is to write it to a MailSlot named messngr. The service waits for a message, then it displays it onscreen. ![]() The Messenger service in Windows 2000 and Windows XP uses the NetBIOS over TCP/IP (NetBT) protocol. ![]() The Messenger Service was discontinued in Windows Vista and Windows Server 2008 and replaced by the old MSG.exe. As a result of this abuse, the Messenger Service was disabled by default in Windows XP Service Pack 2. Because of this, many users received such messages. Even though Windows XP included a firewall, it was not enabled by default. It was used maliciously to present pop-up advertisements to users over the Internet (by using mass-messaging systems which sent a desired message to a specified range of IP addresses). The Messenger Service was originally designed for use by system administrators to notify Windows users about their networks. Example of Messenger service spam from 2007. ![]()
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