On Wed, Oct 10, 2001 at 02:55:39PM -0700, Jeremy C. Reed wrote:
> 
> I am curious about this, because I wrote a simple tool to analyze traffic
> -- and I want to be able to also analyze traffic to network address
> aliases and traffic going through the gateway (by IP). 9I guess i should
> have a closer look at where mrtg or snmp gets this info.) Here is an
> example report:  
> http://www.reedmedia.net/software/analyze_interface_bytes/example-20011010.txt
> (I plan on changing the name.)

I'm not sure if it'll do what you need, but have you tried the nmap package
from pkgsrc/net ?

Regards
Nigel