Adding DNS with ipv6 does not work in AdGuard for IOS and Android

[maxikuzmin]

When adding DNS with ipv6 protocol, the addition does not happen.

In AdGuard for IOS writes "You have entered an invalid upstream"

In AdGuard for Android writes "No connection"

[grumaxxx]

Please check this issue again, seem it is working fine if there are IPv6 network. Otherwise, please send debug logs to make sure what happened.

[sfionov]

@grumaxxx May not be it caused by link-local DNS bootstrap?

[grumaxxx]

@sfionov I suggested it as an option.