All the links work on my end Dan.

Maybe you'll need to look at browser settings or some browser add-on.

Easiest is to try a different browser.

Hi Dan, all the links you mentioned are working fine for me over here and also when tested with Ctrl+F5 and also with "down for everyone or just me".

re:
> Are there mirrors or other locations for this material?

You could try https://archive.org/ .

- Michael

Seems it's just for you!
All links work fine!

Thank you all.

I ended up switching browsers, and I now I can get access to all the sites. What a relief!

I was using Chrome; and reinstalling, eliminating extensions, flushing all DNS cache, changing DNS servers, rebooting made no difference. It was behaving as if it was trying to make connections through the wrong ports. I guess I'll never know why.

Thanks again,

Dan