VPN software can actually leak your original IP address or other sensitive information.There are easy ways to test for a leak.
You'll get results that tell you the IP address and owner of the DNS server you're using. If it's your ISP's server, you've got a DNS leak.WebRTC is a protocol that allows two computers to communicate with one another, making browser-based video conferences or data transmissions possible.
IPv6 is a relatively new Internet protocol that is expected to replace IPv4, which is currently in use. However, many computers, networks, and websites are already fully IPv6 capable. Should you visit a website that is only accessible via IPv6, your computer will use IPv6 to access it. However, if your VPN is only configured for IPv4, your original IPv6 address will be displayed.