The firewall is on. When I go into 'system preferences' - 'sharing' - 'Firewall' it has a massive list. There are no ticked boxes next to any of the list apart from 'Network Time'.

I thought it wouldn't have anything to do with the firewall as I hadn't changed any of the settings before or after I connected through my friends internet. But to be fair, I dont know what im talking about.

The Netgear router is DG834G v3 -54 mbps ADSL.

I dont have any idea how to 'port forward' so if you know what to do with this model and could talk me through it, your an absolute hero