All ports
Port1801/UDP
msmqPort
1801
Protocol
UDP
Category
Registered
Service
msmq
What is port 1801?
Port 1801/UDP is a Registered port, registered with IANA for specific applications. It is associated with the msmq service.
Microsoft Message Que
Useful commands
nmapnmap -p 1801 -sV example.comnetcatnc -zv example.com 1801curlcurl -v http://example.com:1801/telnettelnet example.com 1801bash(echo > /dev/udp/example.com/1801) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1801/udpDeny
sudo ufw deny 1801/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 1801 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 1801 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1801/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1801" dir=in action=allow protocol=UDP localport=1801Security Risks
- Unauthorized access to the service
- Data exposure if the service is unauthenticated
- Outdated versions with vulnerabilities
- Incorrect service configuration
Frequently Asked Questions
What service runs on port 1801/UDP?
Port 1801/UDP is associated with the msmq service. Microsoft Message Que
Is it safe to expose port 1801 to the Internet?
It depends on the service and configuration. Port 1801 (msmq) is a Registered port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.
How do I check if port 1801 is open?
You can use nmap: `nmap -p 1801 -sV example.com`, netcat: `nc -zv example.com 1801`, or the bash command: `(echo > /dev/udp/example.com/1801) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1801 on my firewall?
On Linux with UFW: `sudo ufw allow 1801/udp` (open) or `sudo ufw deny 1801/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 1801 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1801" dir=in action=allow protocol=UDP localport=1801`.
What applications and services use port 1801?
Port 1801/UDP is used by the msmq service. Specific uses depend on the software and configuration. Check our related tools section for more information.