Port 1801MSMQ
Microsoft Message Queuing (MSMQ) is a messaging protocol developed by Microsoft that enables applications running at different times to communicate across heterogeneous networks and systems that may be temporarily offline. It provides guaranteed message delivery, efficient routing, security, and priority-based messaging, facilitating reliable distributed application development and integration within enterprise environments..
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 8,898
2 transports registered
payload readable on path
registered with iana
caution
rank 557 of 993 · top 56%
Technical Details
what runs on :1801Microsoft Message Queuing (MSMQ) is a message-based communication platform designed to enable applications on disconnected or distributed systems to communicate asynchronously. It employs a store-and-forward mechanism that ensures messages are held in queues until the receiving application is available. This design supports robust messaging in environments prone to network fluctuations or temporary outages.
MSMQ operates over TCP port 1801 for direct communication and can use UDP for certain multicast operations. It integrates deeply with Windows operating systems, providing APIs for message queuing and management. Features include transactional messaging to ensure atomic delivery, message journaling, priority-based message handling, and support for both private and public queues.
The technology facilitates scaling by decoupling the communication between components of distributed applications. It is widely used in enterprise solutions, including financial services, supply chain management, and service-oriented architectures, where reliable, asynchronous message exchange is required between heterogeneous systems.
Security Information
exposure of :1801risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
network services averages 3.9 across 604 ports — this one sits 0.1 above.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
tcp · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common Vulnerabilities:
- Unauthorized access due to improper queue permissions
- Message interception or tampering when used without encryption
- Exploitation of unpatched MSMQ service vulnerabilities, potentially leading to DoS or privilege escalation
- Exposure to SMB-related vulnerabilities if integrated with Active Directory or other Windows services
Common Mitigations:
- Implement strict access controls and permissions on queues
- Enable message encryption and signing features where supported
- Regularly patch MSMQ services and underlying OS
- Restrict network exposure using firewalls to limit access to port 1801
- Monitor and audit MSMQ activity for unusual behavior or unauthorized access attempts
Related Ports
the 8 most looked-up other ports in network services — 604 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :9080 | Groove RPC | TCPUDP | Web Services | caution | 70.8k |
| :6543 | Jetnet | UDP | Network Services | caution | 65.3k |
| :5938 | TeamViewer | TCPUDP | Remote Access | caution | 65.0k |
| :8291 | Winbox MikroTik Admin | TCP | Security | caution | 62.9k |
| :3233 | WhiskerControl Protocol | TCPUDP | Network Services | caution | 61.9k |
| :3268 | Microsoft Global Catalog (GC) | TCPUDP | Security | caution | 54.6k |
| :135 | Microsoft EPMAP | TCPUDP | Security | caution | 51.9k |
| :3128 | Tatsoft Default HTTP Proxy | TCP | Web Services | caution | 46.8k |
risk mix of the 8 listed
- caution100%
0 of 8 encrypted