New answers tagged networking
I would use a linux system on a pc or laptop to troubleshoot this wifi connection, using ifconfig, ping, iwconfig. There are also nice dhcp tools on linux. When I had wifi connection problems on an Android phone, with a linux system I found the error in the dhcp server setup. After fixing this, the Android phone connected effortless.
Setup DNS options for VPN connection. You may use any public-available DNS servers, for example 22.214.171.124 Note: Android 4.4+ have bug in the Always-On VPN feature: VPN stay connected, but all traffic is blocked because bug in system firewall. For fix this issue search AlwaysOnVpnFix application on Google Play.
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