I'm getting intermittent problems with internet access on my Ubuntu 12.04 LTS desktop when connected to my Prolink Wifi router. I have Android devices connected to the same router that are working fine so I know the router isn't the problem.
While connected, I'm able to ping my own IP address as well as 127.0.0.1, but I'm unable to ping other devices in the same network, nor are other devices able to ping me. I'm also unable to ping 18.104.22.168.
Any idea how I can fix this problem?