All ports
Port4161/UDP
omscontactPort
4161
Protocol
UDP
Category
Registered
Service
omscontact
What is port 4161?
Port 4161/UDP is a Registered port, registered with IANA for specific applications. It is associated with the omscontact service.
OMS Contact
Useful commands
nmapnmap -p 4161 -sV example.comnetcatnc -zv example.com 4161curlcurl -v http://example.com:4161/telnettelnet example.com 4161bash(echo > /dev/udp/example.com/4161) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4161/udpDeny
sudo ufw deny 4161/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4161 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4161 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4161/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4161" dir=in action=allow protocol=UDP localport=4161Security 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- Outdated versions with vulnerabilities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 4161/UDP?
Port 4161/UDP is associated with the omscontact service. OMS Contact
Is it safe to expose port 4161 to the Internet?
It depends on the service and configuration. Port 4161 (omscontact) 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 4161 is open?
You can use nmap: `nmap -p 4161 -sV example.com`, netcat: `nc -zv example.com 4161`, or the bash command: `(echo > /dev/udp/example.com/4161) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4161 on my firewall?
On Linux with UFW: `sudo ufw allow 4161/udp` (open) or `sudo ufw deny 4161/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4161 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4161" dir=in action=allow protocol=UDP localport=4161`.
What applications and services use port 4161?
Port 4161/UDP is used by the omscontact service. Specific uses depend on the software and configuration. Check our related tools section for more information.