All ports
Port198/UDP
dls-monPort
198
Protocol
UDP
Category
Well-Known
Service
dls-mon
What is port 198?
Port 198/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the dls-mon service.
Directory Location Service Monitor
Useful commands
nmapnmap -p 198 -sV example.comnetcatnc -zv example.com 198curlcurl -v http://example.com:198/telnettelnet example.com 198bash(echo > /dev/udp/example.com/198) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 198/udpDeny
sudo ufw deny 198/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 198 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 198 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=198/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 198" dir=in action=allow protocol=UDP localport=198Security 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- Outdated versions with vulnerabilities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 198/UDP?
Port 198/UDP is associated with the dls-mon service. Directory Location Service Monitor
Is it safe to expose port 198 to the Internet?
It depends on the service and configuration. Port 198 (dls-mon) 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 198 is open?
You can use nmap: `nmap -p 198 -sV example.com`, netcat: `nc -zv example.com 198`, or the bash command: `(echo > /dev/udp/example.com/198) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 198 on my firewall?
On Linux with UFW: `sudo ufw allow 198/udp` (open) or `sudo ufw deny 198/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 198 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 198" dir=in action=allow protocol=UDP localport=198`.
What applications and services use port 198?
Port 198/UDP is used by the dls-mon service. Specific uses depend on the software and configuration. Check our related tools section for more information.