either click this: click me or add a new network. network settings and info are below.
(Setting < Network < Add Connection < Add built-in VPN...)
name: UnblockVPN
provider type: L2TP/IPsec
server hostname: Public-vpn-121.opengw.net
authentication type: Pre-Shared Key
username: vpn
password: vpn
group name: (leave blank)
pre-shared key: vpn