File captured but no Voip traffic inside

[a5464c9f32]

Hi,

using the command
fritzcap.py -c -m -d --cap_interface 1-lan
i can capture a file with what seems to be all of my network activity, but there's no Voip call in there. It triggers the recording automatically and the command line info about caller etc. is also correct. If i do not specify any interface, i get an empty file. I also tried many of the other interfaces and nothing seems to have any traffic, except 1-lan.

FritzCap version 2.3.1 started.
Fritz!Box interfaces from http://......
1-:acc0             = :acc0
1-:acc0             = :acc0
1-:acc0.4           = :acc0.4
1-:acc0.4           = :acc0.4
1-:l2sd0            = :l2sd0
1-:l2sd0            = :l2sd0
1-:l2sd0.2          = :l2sd0.2
1-:l2sd0.2          = :l2sd0.2
1-:l2sd0.3          = :l2sd0.3
1-:l2sd0.3          = :l2sd0.3
1-:l2sm0            = :l2sm0
1-:l2sm0            = :l2sm0
1-:lan0             = :lan0
1-:lan0             = :lan0
1-acc0              = acc0
1-acc0.4            = acc0.4
1-ath0              = ath0
1-ath1              = ath1
1-eth0              = eth0
1-eth1              = eth1
1-eth2              = eth2
1-eth3              = eth3
1-eth_udma0         = eth_udma0
1-eth_udma1         = eth_udma1
1-guest             = guest
1-guest4            = guest4
1-guest5            = guest5
1-guest_st2         = guest_st2
1-guest_st3         = guest_st3
1-ing0              = ing0
1-lan               = lan
1-vlan_master0      = vlan_master0
1-wifi0             = wifi0
1-wifi1             = wifi1
2-1                 = 1. Internetverbindung
2-2                 = 2. Internetverbindung
2-3                 = 3. Internetverbindung
3-0                 = Routing-Schnittstelle
3-17                = Schnittstelle 0 ('internet')
3-18                = Schnittstelle 1 ('lan0')
3001                = Minor = 3001 [':docsis_mng']
3001                = Minor = 3001 [':docsis_mng']
4-128               = WLAN Management Traffic - Schnittstelle 0
4-129               = HW (2.4 GHz, wifi0) - Schnittstelle 0
4-131               = AP (2.4 GHz, ath0) - Schnittstelle 0
4-132               = AP (2.4 GHz, ath0) - Schnittstelle 1
4-138               = AP2 (2.4 + 5 GHz, ath1) - Schnittstelle 1
4-141               = Guest (2.4 GHz, guest4) - Schnittstelle 0
4-142               = Guest (2.4 GHz, guest4) - Schnittstelle 1
4-144               = Guest2 (2.4 + 5 GHz, guest5) - Schnittstelle 1
5-161               = usb1
5-162               = usb2
5-163               = usb3
FritzCap version 2.3.1 finished.

I have a Fritz!Box 6490 Cable that is running FRITZ!OS: 07.02.
Can anybody help me trying to figure out what is going wrong?

[muhvw]

I am not sure, but sometimes there is a VOIP interface mentioned, I don't have one either, but I have actualy way less interfaces than you have.

[jpluimers]

Sorry for responding very late, as it has been a rough few years (see https://twitter.com/jpluimers).

Please understand 1-lan is your LAN which is only local traffic.

Most people have more success with 2-1 which usually is the primary internet connection 1. Internetverbindung.

Sometimes you need 1-lan, for instance when your Fritz!Box is configured as switch instead of router. I have that, so I use --cap_interface 1-lan there. But before that, the Fritz!Box was a router, and I had to use --cap_interface 2-1.

If you can read German: the various posts about --cap_interface parameter here: https://www.ip-phone-forum.de/search/736094/?q=--cap_interface&o=date show more about which the available interfaces work best for various configurations involved.

In fritzcap-interfaces-table.md, I try to keep a list of interface names I have seen myself or on the internet.