A PowerShell script to activate (and update) a 6-in-4 tunnel in Windows 10/11 using Hurricane Electric IPv6 Tunnel Broker

IPv6Tunnel.ps1

$TunnelName = "IPv6Tunnel"
$TunnelID = "123456"

$ServerIPv6Address = "2001:a:b:c::1"
$ServerIPv4Address = "200.1.2.3"

# When behind a firewall appliance that passes protocol 41, 
# use the IPv4 address you get from your appliance's DHCP service 
# instead of the IPv4 endpoint you provided to Tunnelbroker

$ClientIPv6Address = "2001:a:b:c::2"
#$ClientIPv4WANAddress = "100.4.5.6"    # Public Address (autodetected later)
$ClientIPv4NATAddress = "192.168.1.2"   # Local LAN Address

$Username  = "your_he_username"
$UpdateKey = "he_secret_token"

### End of configuration ###

function PingCheck($ip) {
	$pingResult = Test-Connection -ComputerName $ip -Count 1 -Quiet
	if ($pingResult) {
		Write-Output "Ping $ip ... Pass."
	} else {
		Write-Output "Ping $ip ... Fail!"
		exit 1
	}
}

### End of Helper Functions ###

# Check Elevated Prompt
$executionPolicy = Get-ExecutionPolicy
if ($executionPolicy.ExecutionPolicy -ne 'Unrestricted') {
	Write-Output "This script requires elevated privileges (Run as administrator). Exit."
	exit 2
}

# Check Server Endpoint, Update Client Endpoint and (bonus) get ClientIPv4WANAddress
$Credentials = New-Object System.Management.Automation.PSCredential($Username, (ConvertTo-SecureString $UpdateKey -AsPlainText -Force))
$UpdateURL = "https://${Credentials}@ipv4.tunnelbroker.net/nic/update?hostname=${TunnelID}"
$Response = Invoke-WebRequest -Uri $UpdateURL -Credential $Credentials | Select-Object -Expand Content
if ($Response -match "[\d\.]+$") {
	$clientIPv4WANAddress = $matches[0]
	Write-Output "Update Endpoint ... Pass. (IPv4: $clientIPv4WANAddress)"
} else {
	Write-Output "Update Endpoint ... Fail! (URL was: $UpdateURL )"
	throw $Response
}

# Requirements
netsh interface 6to4 set state disabled
netsh interface isatap set state disabled
netsh interface teredo set state disabled

# Cleanup possible remainings
netsh interface ipv6 delete address interface=$TunnelName address=$ClientIPv6Address
netsh interface ipv6 delete interface $TunnelName

# Setup interface, set IPv6 address
netsh interface ipv6 add v6v4tunnel interface=$TunnelName localaddress=$ClientIPv4LANAddress remoteaddress=$ServerIPv4Address
netsh interface ipv6 add address interface=$TunnelName address=$ClientIPv6Address

# Test IPv6 Tunnel
PingCheck($ServerIPv6Address)

# Setup Routing
netsh interface ipv6 delete route interface=$TunnelName ::/0
netsh interface ipv6 add route prefix=::/0 interface=$TunnelName nexthop=$ServerIPv6Address

# Test IPv6 Web
PingCheck("ipv6.google.com")


Write-Output "All done. Good IPv6 surfing."

Hi @sevenissimo, I have found some bugs in your original code.

Please, find fixed version of this script here:
https://gist.github.com/socketz/72322d155f0529537b39e7dee3a05356

Thanks for sharing it! It works.