The parental control software subscription on kids' systems will expire soon. I'm testing to see if NextDNS is a reliable alternative. I have the following problems.
1. My internet connection has both IPv4 and IPv6.
2. NextDNS DoH supports IPv4 only. I thought I'd add DoH for IPv4 and unencrypted IPv6 for IPv6.
3. Wi-Fi - Hardware Properties - DNS Assignment - I tested NextDNS DoH IPv4, but it didn't block adult sites. I then tried unencrypted IPv6, and it worked as expected.
4. I thought I'd use IPv6 only and disable IPv4, but some sites don't work, including the NextDNS website, if I disable IPv4.
5. All sites work if I use IPv4 and disable IPv6, but NextDNS DoH, which supports IPv4, doesn't work when added to Windows 11 23H2.
6. If I use IPv6 with NextDNS unencrypted IPv6 and keep IPv4 enabled, I could access adult sites sometimes and sometimes not.