← Port Encyclopedia
68
DHCP-Client
UDP
Network
Medium Risk
DHCP client — receives IP configuration, DHCP spoofing vulnerability
🔍 How to Scan Port 68
nmap -sV -p 68 target
nmap -sV -sC --script=banner -p 68 target
nc -zv target 68
🛡️ Security Considerations
- Scan port 68 with
nmap -sVto identify the exact service and version - If DHCP-Client is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit dhcp-clientto find known exploits - Monitor traffic on port 68 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation