To configure an iOS device to connect to the client VPN, follow these steps:
Navigate to Settings > General > VPN & Device Management > Add VPN Configuration.
Type: Set to IPsec.
Description: This can be anything you want to name this connection, for example, "Work VPN"
4. Server: Enter the hostname, the admin can find the hostname from Configure > Gateway> Client VPN
5. Account: Enter the username that the admin created on the Configure > Users > ESG VPN Users
6. Password: Enter the password that the admin created on the Configure > Users > ESG VPN Users
7. Secret: Enter the Pre-shared key that the admin find the key from Configure > Gateway> Client VPN
8. Click Done and Enable the VPN connection on the IOS Device.