[mythtv-users] setting up a AirTV Anywhere tuner with MythTV

[Stephen Worthington]

On Sat, 25 Jun 2022 20:00:29 +0100, you wrote:

>Stephen Worthington <stephen_agent at jsw.gen.nz> wrote:
>
>> It is also possible to set up a "man in the middle" PC which connects
>> to the device you are trying to see the traffic from and bridges that
>> traffic to the subnet it is normally supposed to go to.  But that
>> requires a higher level of networking expertise, and two network
>> interfaces.  It is much easier to do with Ethernet than WiFi, but then
>> requires two Ethernet ports.
>
>From memory :
>
>brctl adder br0
>brctl addif br0 eth0
>brctl addif br0 eth1
>ip address add <address> dev br0
>
>There might be a need for some link up commands, it’s a long time since I last did this.
>
>or in /etc/network/interfaces 
>
>auto br0
>iface br0 inet static
>  bridge_ports eth0 eth1
>  address <address>
>  netmask 255.255.255.0
>  gateway <address>
>
>In either case you now have a bridge which is functionally the same as a hardware network switch. Packets will be forwarded automatically as needed. And you can sniff packets on the physical interfaces as they pass through.
>
>
>Simon

It is usually better to sniff the packets on the bridge interface
rather than the physical interfaces.