Ah, thanks, Makosuke.
When I installed the AirPort (with the help of Apple), I wrote down its IP address and other information.
Should I use this information in setting up Azureus, and if so, how, please?
I phoned my ISP, who provide me with broadband through an antenna on the roof beaming in my connection from across the city, and a helpful techie there explained that my NAT errors were coming from the AirPort.
Then I phoned the Apple helpdesk, and got a *very ill-tempered* guy who was clearly delighted not to help, and blamed Azureus. He said that if Azureus was the only program that announced NAT errors, it was clearly the only program that *had* NAT errors.
Incidentally, if I could find the programme referred to in ths this article:
http://tvnz.co.nz/view/page/411749/618188
on a torrent, subtitled, I'd be very interested in watching it. What an insight into cultures that are different from my own!