I tried to use OpenVPN+Scramble in China. After 0,5-1 minute connections is dropped with error (something like "can not resolve DNS", I don't remember exactly). I guess that it is because VPN was used provider's DNS servers which being Chinese prevented the connection to 'wrong' resources.
I tried dnsleaktest.com and it shows provider's DNS even when OpenVPN is connected and green.
Changes in ovpn config file didn't help. I tried to add to the config file the following:
1) dhcp-option DNS <dns_server_ip_address> - no effect
2) block-outside-dns - initial connection can not be established
3) tried
https://github.com/ValdikSS/openvpn-fix-dns-leak-plugin - gives error right after connection
How to force OpenVPN+Scramble not to use provider's DNS servers?