Description:
This document describes how to set up an IKEv2 connection between an Apple iPhone/iPad and a LANCOM R&S®Unified Firewall.
Requirements:
Scenario:
1) The Unified Firewall is connected directly to the Internet and has a public IPv4 address:
2) The Unified Firewall is connected to the Internet via an upstream router:
Procedure:
The setup for scenarios 1 and 2 are basically the same. Scenario 2 additionally requires port and protocol forwarding to be set up on the upstream router (see section 3).
1) Configuration steps on the Unified Firewall:
1.1) Connect to the configuration interface of the Unified Firewall and navigate to VPN → IPSec → Settings.
1.2) Activate IPSec.
1.3) Switch to VPN → IPSec → Connections and click on the “+” icon to create a new IPSec connection.
1.4) Save the following parameters:
If you have created your own template or security profile , you can use these here. |
1.5) Change to the Tunnels tab and enter the following parameters:
If an IP address from a local network should be assigned to the VPN client instead of an address from the Virtual IP Pool (via the field Virtual IP), Route-based IPSec has to be activated and a routing entry for the VPN interface has to be created in the Routing Table 254 which refers to the virtual IP address in the local network. |
1.6) Change to the Authentication tab and enter the following parameters:
Important:
The local and remote identifiers must not match!
1.7) Click the icon to create a new VPN host.
1.8) Save the following parameters:
1.9) In the VPN host click on the "connection" icon and, to open the firewall objects, click on the network object that the iPhone/iPad should access.
1.10) Use the “+” sign to assign the required protocols to the VPN host.
A Unified Firewall uses a deny-all strategy. You therefore have to explicitly allow communication. |
1.11) Finally, implement the configuration changes by clicking Activate in the firewall.
1.12) This concludes the configuration steps on the Unified Firewall.
2) Manual setup of the VPN connection on the iPhone/iPad:
2.1) Open the Settings menu and select the option VPN.
2.2) Add a new IKEv2 VPN connection with the following parameters:
2.3) Click on Done to save the configuration.
2.4) Click on Connected to establish the VPN connection. The connection status is displayed.
3) Setting up port and protocol forwarding on a LANCOM router (scenario 2 only):
IPSec requires the use of the UDP ports 500 and 4500 as well as the protocol ESP. These must be forwarded to the Unified Firewall.
Forwarding the UDP ports 500 and 4500 automatically causes the ESP protocol to be forwarded.
If you are using a router from another manufacturer, ask them about appropriate procedure. |
If the UDP ports 500 and 4500 and the ESP protocol are forwarded to the Unified Firewall, an IPSec connection to the LANCOM router can only be used if it is encapsulated in HTTPS (IPSec-over-HTTPS). Otherwise, no IPSec connection will be established. |
3.1) Open the configuration for the router in LANconfig and switch to the menu item IP-Router → Masq . → Port forwarding table .
3.2) Save the following parameters:
3.3) Create a further entry and specify the UDP port 4500.
3.4) Write the configuration back to the router.