Righto, it works

Based on the premise of "it worked for me and heres what I think I did to make it work" is a minimal guide to accessing whats on a PC from your PS3

PC: Generic Athlon64 3200 with 1Gb ram running FedoraCore 6
PS3: wireless attached

On the PC
yum install ushare (it also fetched dependancies for uPNP libraries)
mkdir /ushare
Drag and drop some content into /ushare

iptables stop
ushare -d -c /ushare

I also enabled uPNP on my router as the PS3 was saying no uPNP was available.
Now I can watch a grainy video clip of DuranDuran Girls On Film.MPG on a really big screen.
Yay, I think.

The next step is to modify the firewall config to allow uPNP to work rather than just turning everything off.
I copied that from: http://forums.teamphoenixrising.net/...ad.php?t=46827

The discussion is dead, and the command doesn't work in ubuntu. I'm have difficulty with iptables stop in particular.

Can someone explain what this does? And why this would require it? Does anyone know of a simpler way of getting this to work? Or does anyone know of a command with this equivalence (iptables stop)?