Greg Oster writes:
> Are the hosts that you are conneting to linux-based?  I seem to only have 
> trouble connecting to linux boxes for whatever reason... (non-linux hosts on 
> the same network segment do not seem to trigger this :-( ) 
>
> [...]
> 
> I've got a CyberSURFR here, if that matters.  I'm more than willing to test 
> any drivers if it gets this resolved :-)  

They're HP boxen running HPUX 10.20
There is ICMP filtering between me at the HP/UX boxen.
My cable modem is a rebadged Motorola CyberSURFR.

As per thorpej's suggestion, I'll try and get an ne2k card from
somewhere (i'm sure we've got boxes of them here) and try it out...