First patch looks up connections in Linux's connection tracking (NAT) table. Handy to iftop the WAN interface on my router and still see LAN IPs.

Second series (4 patches) enables combining multiple network interfaces. I'm using this to monitor my real WAN plus inside-a-VPN traffic (and a filter rule to exclude the VPN traffic on the real WAN).

(It would have been nicer to take multiple -i options rather than use a comma separator, but the options code was too messy and I didn't care to spend additional time figuring out how to refactor it.)

Luke