← Port Encyclopedia
990
Port-990
TCP
System
Low Risk
Reserved or unassigned port 990 — may appear in network scans as open, closed, or filtered
🔍 How to Scan Port 990
nmap -sV -p 990 target
nmap -sV -sC --script=banner -p 990 target
nc -zv target 990
🛡️ Security Considerations
- Scan port 990 with
nmap -sVto identify the exact service and version - If Port-990 is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit port-990to find known exploits - Monitor traffic on port 990 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation