Sorry, karath, next time I'll do that.
Thanks for appreciation, djbob. You can be right. I'm working from then office now (my home internet is slower) and it can be that's firewall as well.
I can see file structure
knowlet.heliohost.org
also from ftp(.heliohost.org)
but I can't even upload a file.
I'm anyway planning to change the ISP at home. Sorry for bothering.