makem
I have Openvpn on my RT-N56U router and my Android phone using the supplied client.ovpn can connect to my network server.
I use the same settings and the same client.opvn on my Nexus 7 but the handshake always fails.
Jul 2 21:34:03 openvpn[12940]: 192.168.1.19:41294 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Jul 2 21:34:03 openvpn[12940]: 192.168.1.19:41294 TLS Error: TLS handshake failed
The Nexus has a working connection to the LAN and WAN
Traffic
It is probably your firewall .. but could be other problems.
Please post your OpenVPN server and client config files and logs.
makem
Would you mind if I return to this at a later date as I was able to get a working server using a Raspberry pi2.
Thank you.