All ports
Port1881/UDP
ibm-mqseries2Port
1881
Protocol
UDP
Category
Registered
Service
ibm-mqseries2
What is port 1881?
Port 1881/UDP is a Registered port, registered with IANA for specific applications. It is associated with the ibm-mqseries2 service.
IBM WebSphere MQ Everyplace
Useful commands
nmapnmap -p 1881 -sV example.comnetcatnc -zv example.com 1881curlcurl -v http://example.com:1881/telnettelnet example.com 1881bash(echo > /dev/udp/example.com/1881) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1881/udpDeny
sudo ufw deny 1881/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 1881 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 1881 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1881/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1881" dir=in action=allow protocol=UDP localport=1881Security 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- Outdated versions with vulnerabilities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 1881/UDP?
Port 1881/UDP is associated with the ibm-mqseries2 service. IBM WebSphere MQ Everyplace
Is it safe to expose port 1881 to the Internet?
It depends on the service and configuration. Port 1881 (ibm-mqseries2) 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 1881 is open?
You can use nmap: `nmap -p 1881 -sV example.com`, netcat: `nc -zv example.com 1881`, or the bash command: `(echo > /dev/udp/example.com/1881) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1881 on my firewall?
On Linux with UFW: `sudo ufw allow 1881/udp` (open) or `sudo ufw deny 1881/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 1881 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1881" dir=in action=allow protocol=UDP localport=1881`.
What applications and services use port 1881?
Port 1881/UDP is used by the ibm-mqseries2 service. Specific uses depend on the software and configuration. Check our related tools section for more information.