I used Network Device Control. That happened to work perfectly and easily (not a very common occurrence in Linux: as much as I loathe Windoze and want to see a viable alternative, Linux ain't it yet. It's usually a pain).
Anyway, I am loath to try a different connection method, as I'm reasonably sure it would be difficult, frustrating, and unnecessarily complicated, assuming it will work at all.
I am reasonably comfortable with the command line (I cut my computing teeth on VMS in 1985, so command line work doesn't scare me. I do miss VMS, though; Unix seems to delight in being unnecessarily cryptic). So if there is a command I can use (a switch on ping, maybe?), that'd be great.