By Shiva.Thorny 2024-10-30 08:05:41
The .net framework update is just a change to runtime code for a specific set of software development tools. FFXI doesn't use it, and it's not actually (inherently) related to networking, so I wouldn't say it's likely to be the cause.
I've seen various amounts of my characters get the 4001 disconnect overnight, often not every character on the same connection. If I had to guess, I would say it's SE's fault and you probably can't do anything about it, but I don't have much real evidence to support that take.