PublicVPN.com

Here are generic settings that you need to set up any generic L2TP/IPsec client.

Server Name: gateway.publicvpn.net
Username: your publicvpn.com username
Password: your publicvpn.com password
Shared Secret: publicvpn.net
DHCP: on

Note: your L2TP/IPsec client must support NAT-T if it is behind NAT. Ask your VPN client vendor for more information on your VPN client's NAT-T capability.