Originally Posted by Thomas Jensen
It's all domains on my server, and any other server at Hetzner I've found out, which the specific users can't access. So it doesn't look like my problem, but Hetzner hasn't confirmed it yet.
To domains (different servers): http://spilcomputer.dk
(mine) and http://arwo.dk
(other server at Hetzner).
Two domains which work? http://google.dk
I asked one that not work with your users.
And One that work, are you facebook.com owner ?
Anyway dns is ok. Maybe you shoud ask to your clients the current dns(ADSL) e try from there.
Maybe just a failtoban or some website config is those domains.