Once I'd actually managed to get a UMTS connection, I thought I'd share the love and let larsen, who I'm temporarily sharing with, connect via wifi. Dorward kindly dug up some links on masquerade, a way to share your internet connection that appears to require grokkage. He also passed me this cookbook, which was much nicer (though not especially successful).
Of course, the next day, I tried to dial up again, and failed. I hates computers. Yesterday, with some more random modprobeing and editing of wvdial.conf, a lot of swearing, and the odd reboot of phone and laptop, I managed to get an IP address! But no data transfer.
All was revealed when I got into work and couldn't connect to the LAN either. Using the cookbook, I'd managed to get my iptables to drop all packets. Handily $colleague{Riccardo} knew the incantation to reset iptables
iptables -F; iptables -P INPUT ACCEPT; iptables -P OUTPUT ACCEPT; iptables -nLand all was well.
But I shouldn't have to know all this. I want a big button labelled "Make it all worky!" (As nnunley suggests, the button is optional, merely there to assuage your techy self-worth, much like the egg in shop-bought cake-mix).
