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I'm looking to snoop on an SSDP conversation between two devices on Wifi. I've set up a WireShark instance on a Ubuntu machine and configured condifured a "Monitor" device using these instructions: https://sandilands.info/sgordon/capturing-wifi-in-monitor-mode-with-iw

However when I now capture via the mon0 device I only see 802.11 protocol packets and can't see any SSDP packets

I had tried just ticking the the "monitor" box on the interfaces list but it would not stay "ticked". The output of iw dev is:

phy#0
        Interface mon0
                ifindex 4
                wdev 0x2
                addr c8:f7:33:8a:dc:07
                type monitor
                txpower 15.00 dBm
        Interface wlp2s0
                ifindex 3
                wdev 0x1
                addr c8:f7:33:8a:dc:07
                type managed
                channel 2 (2417 MHz), width: 20 MHz, center1: 2417 MHz
                txpower 15.00 dBm

Is there away to capture a SSDP conversation in Monitor mode?

I'm looking to snoop on an SSDP conversation between two devices on Wifi. I've set up a WireShark instance on a Ubuntu machine and condifured a "Monitor" device using these instructions: https://sandilands.info/sgordon/capturing-wifi-in-monitor-mode-with-iw

However when I now capture via the mon0 device I only see 802.11 protocol packets and can't can'ts see any SSDP packets

I had tried just ticking the the "monitor" box on the interfaces list but it would not stay "ticked". The output of iw dev is:

phy#0
        Interface mon0
                ifindex 4
                wdev 0x2
                addr c8:f7:33:8a:dc:07
                type monitor
                txpower 15.00 dBm
        Interface wlp2s0
                ifindex 3
                wdev 0x1
                addr c8:f7:33:8a:dc:07
                type managed
                channel 2 (2417 MHz), width: 20 MHz, center1: 2417 MHz
                txpower 15.00 dBm

Is there away to capture a SSDP conversation in Monitor mode?