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UDP
Unknown
68 DHCP Client
DHCP clients listen for lease offers and renewal traffic after broadcast discovery.
Security Context
Port 68 is context-dependent. Its risk depends on the daemon behind it, whether the traffic is encrypted, and how tightly the listener is scoped to trusted networks.
Nmap Check
Use a version probe first so you confirm whether the expected service is really what is listening on this port.
nmap -sU -p 68 <host>Firewall Commands
UFW
sudo ufw allow 68/udpiptables
sudo iptables -A INPUT -p udp --dport 68 -j ACCEPT