← Port Encyclopedia
43
WHOIS
TCP
OSINT
Low Risk
WHOIS protocol — domain registration lookup, reconnaissance tool for attackers
🔍 How to Scan Port 43
nmap -sV -p 43 target
nmap -sV -sC --script=banner -p 43 target
nc -zv target 43
🛡️ Security Considerations
- Scan port 43 with
nmap -sVto identify the exact service and version - If WHOIS is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit whoisto find known exploits - Monitor traffic on port 43 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation