That’s true for many, but my passport isn’t very strong, so I still have to deal with a lot of paperwork for most transits.
There's probably special rules for those people in some places, which makes the situation even more complicated.
stumbling into great forums and blogs while searching for something is a rare thing now.
dynamodb.us-east-1.api.aws
cross check the package json with list.
https://dprk-research.kmsec.uk/
nginx do support it.
https://nginx.org/en/docs/quic.html
https://nginx.org/en/docs/http/ngx_http_v3_module.html
He might have setup IPv4 internal DNS server and java might have used the public IPv6 DNS to resolve the domain.