On Wednesday, September 28, 2016 at 5:09:13 PM UTC-4, Sam Roza wrote: > > Hi Matt, > > I have an LW-301 here, and I have loaded the interceptor driver, but it > seems that the interceptor basically requires putting a piece of hardware > in between the router and the OS Internet Gateway if you don't have > administration rights over your router-mine happens to be provided by my > ISP, and I cannot do a DNS takeover, or put in custom firewall rules to > redirect traffic to another box on the network. > > I'm trying to figure out how to intercept the traffic *without* putting > another piece of hardware in between the devices-for expense, power, and > complexity's sake. I do not know why, but wireshark doesn't show any > packets bleeding over from the gateway to my laptop via the switch they are > plugged into. >
hi sam, you're right - somehow you need to get between the os internet gateway and the internet. a network switch limits traffic to each physical port - your laptop will see only its own traffic, not that of other devices plugged into the switch. a few low-end switches have an option to mirror traffic to a designated port, but that kind of feature is typical of higher-end 'managed' switches. you could insert a network hub (not a switch) between the os internet gateway and your switch, then sniff the traffic on a computer plugged in to the hub. but that requires one more device (the hub). hubs are still available, but these days most people just get a switch with port mirroring if they need to tap the physical interface. if there is wifi between the os internet gateway and your switch, then you might be able to sniff traffic there. you could insert a low-end, low-power computer with two network interfaces between the os internet gateway and your router. technically this would not be an additional device, since you need a computer on which to run weewx anyway. another option is to buy a sdr dongle - about 20$US. then use the sdr driver to sniff the rf signals directly from the os sensors. it means another device (the dongle and a low-power computer such as a raspberry pi on which to run it), but you could rationalize it as a backup to the os internet gateway :) m
