Ubuntu 14.04.2 LiveCD, why does internet disappear after some time?

Question

ubuntu

In general, I sit so far without a hard drive. I just wanted to hack a flash drive with Ubuntu 14.04 (specifically Runtu 14.04.2 64bit) and surf... but for some reason the Internet disappears after some time. Time is not always the same.
The internet icon continues to indicate that there is a connection. Ping ya.ru no hell... If you make a disconnect connection, the connection process remains eternal.
The cable is connected to a WiFi router, the Internet is caught on other devices. Before that, the same system was on the hard drive, everything worked fine.
What could be the problem?

Answer 1

As it falls off next time, go to the admin panel of the router from any other device and see if there are connections and their status. At the same time, check that the router is not hanging / losing connection.