← Port Encyclopedia
83
HTTP-Alt
TCP
Web
Medium Risk
Alternative HTTP — third alternative web port
🔍 How to Scan Port 83
nmap -sV -p 83 target
nmap -sV -sC --script=banner -p 83 target
nc -zv target 83
🛡️ Security Considerations
- Scan port 83 with
nmap -sVto identify the exact service and version - If HTTP-Alt is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit http-altto find known exploits - Monitor traffic on port 83 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation