Microsoft Message Que

Microsoft Message Queuing (MSMQ) is a messaging protocol that enables applications to communicate asynchronously across different networks and systems. It ensures reliable message delivery, even in the event of network failures. MSMQ is commonly used in distributed systems to facilitate communication between different components.

What is Microsoft Message Que

Microsoft Message Queuing (MSMQ) is a messaging protocol developed by Microsoft that allows applications running on separate servers and systems to communicate with each other in a reliable and asynchronous manner. Introduced in the mid-1990s, MSMQ has been a critical component in the development of distributed systems, enabling seamless communication between different parts of an application.

MSMQ works by placing messages in queues, which can be read by the receiving application at its own pace. This decoupling of the sender and receiver ensures that messages are not lost even if the receiving application is temporarily unavailable. MSMQ supports various features such as message prioritization, transactional messaging, and security, making it a robust solution for enterprise-level applications.

Over the years, MSMQ has been integrated into various Microsoft products and services, including Windows Server and the .NET Framework. It is widely used in scenarios where reliable message delivery is crucial, such as financial services, healthcare, and e-commerce. Despite the emergence of newer messaging technologies, MSMQ remains a viable option for many legacy systems and applications.

Microsoft Message Que runs on TCP and UDP port 1801 and is official IANA port.

Security risk

If port 1801 is open and MSMQ is running, it could be a target for unauthorized access or attacks. An attacker could potentially intercept or manipulate messages, leading to data breaches or system disruptions. Proper security measures, such as firewalls and authentication, should be in place to mitigate these risks.

In our UFW tutorial you can follow instructions how you can configure UFW to close port 1801. Use StackChanges to monitor if the Microsoft Message Que port is closed and stays closed. StackChanges will send an alert if port 1801 is open again.