Unable to catch websocket traffic (both directions)

Hello,

I have a computer A:
- 192.168.0.1 (physical laptop)
- Glassfish server (websocket endpoint)
- Wireshark

and a computer B:
- VM inside Virtualbox, which A runs (network = bridged)
- 192.168.0.2

Now, when I try to catch websocket traffic (B opens a browser, connects to endpoint A and sends text using JS. Server replies with some text), I can only see ws-traffic from A to B. However my glassfish server outputs the text that B sends, so it (A to B) must go along the 'wire' also.

Is there something wrong how I filter the traffic? I use ip-filter with value 192.168.0.2. It seems to catch tcp handshake ok and other traffic as well. But I can only see tcp from B to A and not websocket. Any ideas?

thanks, E