This morning, between 7h00 and 8h45, there were some stability issues with my Home ISP, and this site is being hosted on a home computer of mine, which is acting as a server. As a result, IPv4 accessibility to this site and to this blog were in fact impaired. Further, it took until about 16h30 for me to restore IPv6 accessibility manually.
I apologize for any inconvenience.
Dirk