All ports
Port246/UDP
dsp3270Port
246
Protocol
UDP
Category
Well-Known
Service
dsp3270
What is port 246?
Port 246/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the dsp3270 service.
Display Systems Protocol
Useful commands
nmapnmap -p 246 -sV example.comnetcatnc -zv example.com 246curlcurl -v http://example.com:246/telnettelnet example.com 246bash(echo > /dev/udp/example.com/246) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 246/udpDeny
sudo ufw deny 246/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 246 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 246 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=246/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 246" dir=in action=allow protocol=UDP localport=246Security 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- Outdated versions with vulnerabilities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 246/UDP?
Port 246/UDP is associated with the dsp3270 service. Display Systems Protocol
Is it safe to expose port 246 to the Internet?
It depends on the service and configuration. Port 246 (dsp3270) 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 246 is open?
You can use nmap: `nmap -p 246 -sV example.com`, netcat: `nc -zv example.com 246`, or the bash command: `(echo > /dev/udp/example.com/246) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 246 on my firewall?
On Linux with UFW: `sudo ufw allow 246/udp` (open) or `sudo ufw deny 246/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 246 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 246" dir=in action=allow protocol=UDP localport=246`.
What applications and services use port 246?
Port 246/UDP is used by the dsp3270 service. Specific uses depend on the software and configuration. Check our related tools section for more information.