← Port Encyclopedia
563
NNTPS
TCP
Messaging
Low Risk
NNTP over SSL — encrypted Usenet access
🔍 How to Scan Port 563
nmap -sV -p 563 target
nmap -sV -sC --script=banner -p 563 target
nc -zv target 563
🛡️ Security Considerations
- Scan port 563 with
nmap -sVto identify the exact service and version - If NNTPS is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit nntpsto find known exploits - Monitor traffic on port 563 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation