We've been adding new references to articles that we wrote some time ago, but a new issue has just arisen. Some of our articles are relatively ambiguous because they are based more on rumor and conjecture than on fact. To fill in some of the facts, we will be including small Update articles every now and then. You can copy these updates into the original articles or leave them here-whatever is easier for you.
Improve Apple Services with AirPort Base Stations
You can make iChat file transfers, iDisk, and Back to My Mac work better by turning on a setting with Apple AirPort base stations released starting in 2003. Launch AirPort Utility, select your base station, click Manual Setup, choose the Internet view, and click the NAT tab. Check the Enable NAT Port Mapping Protocol (NAT-PMP) box, and click Update. NAT-PMP lets your Mac OS X computer give Apple information to connect back into a network that's otherwise unreachable from the rest of the Internet. This speeds updates and makes connections work better for services run by Apple.