All ports
Port3979/UDP
smwanPort
3979
Protocol
UDP
Category
Registered
Service
smwan
What is port 3979?
Port 3979/UDP is a Registered port, registered with IANA for specific applications. It is associated with the smwan service.
Smith Micro Wide Area Network Service
Useful commands
nmapnmap -p 3979 -sV example.comnetcatnc -zv example.com 3979curlcurl -v http://example.com:3979/telnettelnet example.com 3979bash(echo > /dev/udp/example.com/3979) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3979/udpDeny
sudo ufw deny 3979/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 3979 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 3979 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3979/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3979" dir=in action=allow protocol=UDP localport=3979Security 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- Outdated versions with vulnerabilities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 3979/UDP?
Port 3979/UDP is associated with the smwan service. Smith Micro Wide Area Network Service
Is it safe to expose port 3979 to the Internet?
It depends on the service and configuration. Port 3979 (smwan) 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 3979 is open?
You can use nmap: `nmap -p 3979 -sV example.com`, netcat: `nc -zv example.com 3979`, or the bash command: `(echo > /dev/udp/example.com/3979) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3979 on my firewall?
On Linux with UFW: `sudo ufw allow 3979/udp` (open) or `sudo ufw deny 3979/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 3979 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3979" dir=in action=allow protocol=UDP localport=3979`.
What applications and services use port 3979?
Port 3979/UDP is used by the smwan service. Specific uses depend on the software and configuration. Check our related tools section for more information.