Android Device cannot connect to remote host

My android tablet, with full permissions, does not allow a login with computers, aka it won't allow me to type in the boxes.   Also when I try and use a partner id it says "connection could not be establish"  "check your internet connection."   The machine running host is a Ubuntu linux box and seems to work fine with windows and mac devices both inside my network and externally.   I have allowed full permissions for the app.

Thanks for any help in advance,

Gary