How to set up internet on VirtualBox?

Question

virtual box

I can not understand why the Internet falls off with the error no buffer space available freebsd ?
I set up the network via an external wi-fi adapter ASUS WL-167G settings on the screenshots.

After starting the virtual machine, it finds a Wi-Fi network and connects without problems. I start ping a remote server, for example mail.ru, the ping goes fine, but as soon as I start the browser and open some site, the ping immediately falls off and writes no buffer space available freebsd . What is it and how to defeat it?
Xubuntu is on the virtual machine, I don’t remember which version))