Is port 546 (DHCPv6 Client) dangerous?

Port 546 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 546 be open on my firewall?

Port 546 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 546 use?

Port 546 (DHCPv6 Client) uses the UDP transport protocol and falls under the System & Infrastructure category.

:546 (UDP)

DHCPv6 Client

Medium Risk

UDP — System & Infrastructure

Port Overview

Port Number 546

Service Name DHCPv6 Client

Transport Protocol UDP

Category System & Infrastructure

Security Risk Medium

Port Range Well-Known (0-1023)

What is Port 546?

Port 546 is assigned to DHCPv6 client, used by IPv6 hosts to receive dynamic address configuration from DHCPv6 servers (RFC 3315). Critical for IPv6.

UDP System & Infrastructure Commonly Used

Security Considerations

Port 546 (DHCPv6 Client) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.

Recommendation: Keep the service updated. Monitor logs for unusual activity.

Related Ports — System & Infrastructure

0 Reserved 1 TCPMUX 2 Management Utility 3 CompressNET 4 Unassigned 5 RJE 6 Unassigned 7 Echo

Related Terms

Bandwidth Latency Packet Loss Ping Throughput ASN