When we use a VPN to protect our privacy, we always want to know that the VPN is useful in security or not. To find it out, we can do the IPLeak Test, IPV6 Leak Test and DNSLeak Test. Here are some tools for you, click the link to that website and test it, You can test your WebRTC IP leak too.
IPV6 Leak Test
All these tools are easy to use, some of them will automatically test when you visit their website, you need click a “START” or “TEST” button on some website of them.
Test result is easy to understand too, it’s very clear like “left” or “right”.