Port 4500 — ipsec-nat-t

IPsec NAT-Traversal

Transport protocols: tcp, udp

Registered Services

• ipsec-nat-t / tcp — IPsec NAT-Traversal (RFC9329)
• ipsec-nat-t / udp — IPsec NAT-Traversal (RFC3948][RFC7296)

Assignment from the IANA Service Name and Transport Protocol Port Number Registry.