I just did a test download from that site and it never asked me for a kind of password or login.
That's weird it just did for me, Which web browser did you use? also can you open the file you downloaded, I do get zero byte leftovers from the attempt
I use Chrome. And you're right, I was able to open the zip file, but it was empty.
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Before the Web - telnet: furmenservices.net:23232
Legends of Yesteryear (FIDO 1:123/256) - telnet: furmenservices.net:23322
Sound Source ]|[ - telnet: furmenservices.net:2323
Furmen's Folly (FIDO 1:123/257) - telnet: furmenservices.net:23
--- Mystic BBS v1.12 A44 2020/02/04 (Windows/64)
* Origin: Before the Web (21:4/102)