Any server can serve HAN exploit.
Theres a thread in here somewhere where some devs are working on a raspberry pi HAN server. So that's an option. Also there's files there for Linux to add to your own server.
I still haven't gotten round to testing these on my home server yet, but it is working from what I've read.
Basically, host the files on your server, and use ps3 browser to direct to the location (eg 192.169.0.1/han)