I used the network-manager-openvpn but i couldn't import the configuration file so i had to set it up manually, i post the configuration here in case anyone need to use it..
After you install the network-manager-openvpn configure a new VPN connection:
In the General Tab keep the default values.
In the VPN tab, you have to complete with the values especified (username and password are the ones in the user-pass.txt; the certs and the key are the ones providen here https://ctf365.com/vpn/cert.tgz):
Then go to Advanced:
- In the General tab select LZO data compression and Randomize remote hosts
- Mark the check "Use this connection only for resources on its network"
- In the Tab IPv6 Settings in Method, select Ignore:
If everything was good, you should be able to connect to the VPN.
in Terminal you should see a tun interface(in my case is tun0):
And with the route command you can see if the routes have been enabled correctly:
I hope this information to be useful for anyone that required it.