Step 1: Go to settings
Step 2: Go to "General"
Step 3: Go to "VPN"
Step 4: Tap "Add VPN Configuration"
Step 5: Enter the requested information
a) Select "IPsec"
b) Put a description of the server
c) Put the IP address of the server (Ex. 188.8.131.52)
d) Put the username of the account you are connecting with
e) Put the password associated with the username
f) Enter the preshared key associated with the VPN