(Tracking) Brave VPN IPv6 tests

[bsclifton]

Description

Before we go live with Brave VPN, we need to verify the IPv6 solution that we worked with the vendor on. Basically, they have a config on Windows only (does not apply to other platforms) which will assign a local link IPv6 IP (which is not routable). This prevents requests being made on another adapter (if another adapter is configured with IPv6 and a website has IPv6 DNS records; ex AAAA record)

Steps to Reproduce

1. Be on a Windows machine with IPv6 setup
2. Visit https://test-ipv6.com/ and make sure you get a good IPv6 score
3. Buy Brave VPN and login to account.brave.com (or staging equivalent) to get credentials issued
4. Connect to Brave VPN (any server)
5. Run a few tests:
   • Open an instance of cmd.exe and run ipconfig /all. Verify that the Brave VPN (name differs depending on channel) connection:
     • Has an IPv4 address assigned
     • Has a local-link IPv6 IP address assigned (starts with fe80)
   • Is in the region you selected - visit https://whatismyipaddress.com/
   • https://test-ipv6.com/ should give a failing score (ex: IPv6 is not enabled)

Expected result:

All of the tests should pass

cc: @stephendonner @LaurenWags @kjozwiak

[stephendonner]

Verified PASSED using

Brave	1.49.101 Chromium: 110.0.5481.104 (Official Build) beta (64-bit)
Revision	46de4a7f41979e829b430bc1ee30ef483aa227ac-refs/branch-heads/5481_77@{#19}
OS	Windows 10 Version 22H2 (Build 19045.2604)

NOTE: All tests performed were using the production-purchased BraveVPN connection 👍

Confirmed:

• link-local fe80:: IPv6 address
• 0/10 on IPv6 test
• no DNS-server (ISP) leaks
• Cloudflare was used as the DoH Multi-Home Name Resolution mitigation DNS provider

default, 10/10 IPv6	Brave VPN, 0/10 IPv6	whatismyipaddress.com	browserleaks.com/dns	dnsleaktest.com	link-local fe80::

[stephendonner]

Verification PASSED using

Brave	1.49.106 Chromium: 110.0.5481.104 (Official Build) beta (x86_64)
Revision	46de4a7f41979e829b430bc1ee30ef483aa227ac-refs/branch-heads/5481_77@{#19}
OS	macOS Version 11.7.4 (Build 20G1120)

default, 10/10 IPv6	Brave VPN, 0/10 IPv6	whatismyipaddress.com	browserleaks.com/dns	dnsleaktest.com	link-local fe80::