I have to think this has been asked before, but Googling and archive-searching didn't show me anything enlightening. I'd like to measure bandwidth on my enc0 interface. I can easily monitor the physical interfaces on my routers using netstat or snmp, but all the statistics for enc0 (and pflog0, and pfsync0) are zero. Ok, so I can't monitor bandwidth on virutal interfaces -- I can understand that. The next most obvious option is to set up something like tcpdump and a few other things to count packets on enc0, or to count esp packets on my external interface, or even to count packets on the internal interface headed to the network on the other side of the tunnel, or something. That's certainly possible, and not terribly daunting, but I was hoping someone had a better solution (where better = "here's a command that pulls a counter from the kernel" or "this package makes the value available over snmp" or even "here's the script I use"). I appreciate any pointers anyone is willing to give.
-Josh
