I unable to connect to my home NAS VPN server using built-in L2TP/IPSec profile: It stays in "connecting" state for many seconds then switch back to "disconnected".
I thought it was an incompatibility between my NAS VPN stack and Android built-in client.
But yesterday I had the opportunity to make a test using a Samsung Galaxy S3 "Mini" (using same profile and settings) and it worked!
And today, I tried with two colleagues devices: a LG G3 and a Samsung Galaxy S4, both running same android version (4.4.2) as the Z, and using same mobile operator and mobile plan.
They are connecting fine too!
Would anyone have an explanation of what's happening here?