OpenVPN

TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)

 
This error occurs When a OpenVPN Server is enabled with TLS Authentication. In this case we need to check for the line
tls-auth ta.key 0 
line is enabled in the server config file. If its, then uncomment and try it. That should work. If it does'nt work in that case also then its the problem of your network Firewall. Please check with your System Administrator.