Hi guys, I have a small network question. On a MacBook, is it possible to use a USB aircard (to use AT&T 3G for internet access) and at the same time connect via the Mac's airport to an airport extreme in order to utilize wireless printing? Thank you for any help
If the kernel sees both network devices and you can fiddle with them via "ifconfig", then yes. You'll probably have to manally dink your routing table to send stuff in the right directions, as the config-manager [the backend for the GUI network system preferences] might not handle it quite right. . Make sure forwarding is off: sysctl -w net.inet.ip.forwarding=0 . _H*
I remember reading something about how 10.6.x (Snow Leopard) should actually automatically figure out that one device is local (LAN) and the other device has internet access (WAN) and direct traffic appropriately. If I find that link I'll add it here. That does assume, of course, that the LAN (i.e., airport extreme) does not also have an internet connection. If it does, you will have to do the routing manually.
