Hi,

I'm running Gentoo on an Acer Travelmate 7750 laptop. This particular
laptop has a Broadcom wireless NIC that only works with the
proprietary Broadcom wl driver as provided by the broadcom-sta ebuild.

Wireless by itself works perfectly fine, but when I use virtualbox
with the virtual NIC bridged to my wlan0 interface, networking in the
guest OS doesn't work properly.

I have made the following observations:

* when the guest OS is configured to use DHCP it doesn't get an IP
  from my DHCP server, but get an autoconfig IP instead
* however, I can see the DHCP requests towards my DHCP server in
  Gentoo when monitoring the wlan0 interface with
    # tcpdump -i wlan0
* when I configure a static IP on the guest OS, I cannot ping from the
  guest to the Gentoo host or my default gateway, but pinging from the
  Gentoo host or my gateway to the guest OS works fine

I manage my wireless NIC through /etc/conf.d/net, using wpa_supplicant
with the wext driver. I also tried using networkmanager, but that gave
the exact same result.

Under Ubuntu 12.04 the network bridge between the vbox NIC and the
wireless NIC works fine. This is also with the proprietary wl driver,
same version and all.

Anyone an idea what might be wrong with my setup?

Best,
Tommy

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