A central syslog and firewalled 8291 ports with
logging would be a better solution imho :)
Grep seems less of a strain than tshark and would be quicker I imagine
If you would want to do this permanently, yes. But this is only something I would run
maybe
for 3-4 days and then be bored.
First night I did the tshark logging without the postprocessing (so file gets the
1-line-per-packet
trace info) and it collected 500MB in a single night. Maybe you don't want that all
in the syslog...
Now I keep only the source addresses,
Rob