Nope, I haven’t. I haven’t touched it really. That IP is my default gateway (my router). The only thing I have done with IPv6 involved a perl module, but that was ages ago. This appears to be very much linked to the fact that I enabled security only for external users.
@rlkoshak@rossdargan This looks a bit different to me. Based on looking at the source code, the log message seems to be from an UnknownHostException when trying resolve the address given in the HTTP request. I have no idea how that would happen and unfortunately the exception bypasses the TRACE-level logging that would show the incoming address.
The problem I had was related to the IPv4 security mask not matching the IPv6 request address and it only caused the authentication dialog to be shown in the browser with no logged errors by OH.
If you are handy with packet capture software like Wireshark you could determine what’s being sent to OH that way.
P.S. Please trim down the stacktrace in the original post. There’s not a good reason to show the same log error so many times and it makes it difficult to navigate this thread using a device with a small screen (like a smartphone).