Guide
IPv6 leak test: does your VPN cover IPv6?
Many networks now use IPv6 alongside IPv4. If a VPN handles only one of them, some traffic can travel outside the tunnel. Here is what an IPv6 leak is and how to check.
What to know
A device with IPv6 can reach many sites over either protocol. When a VPN protects IPv4 but leaves IPv6 alone, sites that support IPv6 can see your provider’s address even though the VPN looks connected.
How to use it
Connect your VPN and open our free IP check. Compare the IPv6 row with what you see with the VPN off. No IPv6 detected, or an address that is not your provider’s, is what you want. The FollowNet app also includes a privacy check that tests IPv6 through the tunnel.
Limits and honest expectations
Not every network has IPv6, so “not detected” may simply mean your provider does not offer it. Test on each network you use, especially mobile data, where IPv6 is common. A result only describes the current network.
Key points
- Free includes a weekly traffic allowance
- Current plan details always appear in the app
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