Inspect a Teredo IPv6 address

What it can do

• Show longhand and shorthand IPv6 forms
• Detect a Teredo transition address
• Extract the embedded server and client IPv4 addresses
• Decode UDP port and flag metadata

Demonstration

Input:

2001:0000:4136:e378:8000:63bf:3fff:fdd2

Key result:

Teredo
server: 65.54.227.120
client: 192.0.2.45
UDP port: 40000

This is useful during packet review or incident triage because the apparent IPv6 address carries IPv4 connection context.