All ports
Port748/UDP
ris-cmPort
748
Protocol
UDP
Category
Well-Known
Service
ris-cm
What is port 748?
Port 748/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the ris-cm service.
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Useful commands
nmapnmap -p 748 -sV example.comnetcatnc -zv example.com 748curlcurl -v http://example.com:748/telnettelnet example.com 748bash(echo > /dev/udp/example.com/748) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 748/udpDeny
sudo ufw deny 748/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 748 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 748 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=748/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 748" dir=in action=allow protocol=UDP localport=748Security 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- Outdated versions with vulnerabilities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 748/UDP?
Port 748/UDP is associated with the ris-cm service. Russell Info Sci Calendar Manager
Is it safe to expose port 748 to the Internet?
It depends on the service and configuration. Port 748 (ris-cm) is a Well-Known 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 748 is open?
You can use nmap: `nmap -p 748 -sV example.com`, netcat: `nc -zv example.com 748`, or the bash command: `(echo > /dev/udp/example.com/748) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 748 on my firewall?
On Linux with UFW: `sudo ufw allow 748/udp` (open) or `sudo ufw deny 748/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 748 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 748" dir=in action=allow protocol=UDP localport=748`.
What applications and services use port 748?
Port 748/UDP is used by the ris-cm service. Specific uses depend on the software and configuration. Check our related tools section for more information.