https://support.apple.com/en-il/102281
Third-party security software that monitors or interacts with network connections can potentially block some connections, such as those required to access the...
network connectivitydeviceissuescheckvpn
https://mullvad.net/ko/blog/android-leaks-connectivity-check-traffic
An ongoing security audit of our app identified that Android leaks certain traffic, which VPN services cannot prevent. The audit report will go public soon....
connectivity checkmullvad vpnandroidleakstraffic
https://chromewebstore.google.com/detail/ipv6-ipv4-connectivity-ch/ommkiejjeapchdhpjeomcojalnabkmko
Quick check for IPv4 and IPv6 network connectivity
chrome web storeconnectivity check