← Port Encyclopedia
513
rlogin
TCP
Remote Access
Critical Risk
Remote login — cleartext remote login, trust relationship exploitation
🔍 How to Scan Port 513
nmap -sV -p 513 target
nmap -sV -sC --script=banner -p 513 target
nc -zv target 513
🛡️ Security Considerations
- Scan port 513 with
nmap -sVto identify the exact service and version - If rlogin is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit rloginto find known exploits - Monitor traffic on port 513 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation