I was provided with an access to the VPN server. All I got were server's IP, username and password. Under Windows connecting to the server was easy - I just had to type the information I received.
Problems started when I wanted to connect to the server from Ubuntu (14.04). I tried with pptp using many manuals from the web but nothing worked. Then openvpn - it requested a certificate I didn't have.
I asked server's admin if he can give me a bit more information about configuration and he told me
The VPN is set on a Cisco 2911 router
I downloaded vpnc but it requires me to provide a group name and a group password but I don't have those. I'm in dark now.
Does someone know what should I do in order to connect to this server? Thanks in advance.