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Configure Apple iPad for Cyberoam L2TP VPN Connection

Applicable to Version: 10.00 (All builds)

Layer 2 Tunneling Protocol (L2TP) can be used to create VPN tunnel over public networks such as the Internet. L2TP uses PPP over UDP (port 1701) to tunnel the data. This protocol is based on the client/server model.

The function is divided between the L2TP Network Server (LNS), and the L2TP Access Concentrator (LAC). The LNS typically runs on a network gateway such as a router and firewall, while the LAC can be a dial-up Network Access Server (NAS), or a PC with a bundled L2TP client such as Microsoft Windows.

This procedure outlines how to configure Cyberoam for L2TP connection (As a L2TP server) to Apple iPad devices (As a L2TP client) and create L2TP connection from Web Admin console:  

This document has 2 sections:

·         Cyberoam Configuration

·         Apple iPad Configuration
 

Cyberoam Configuration

The entire configuration is to be done from Web Admin Console. Access Web Admin Console with user having “Administrator” profile.

Step 1: Configure L2TP

Go to VPN à L2TP à Configuration to manage L2TP Configuration.
 

Parameters

Value

General Settings

Local IP Address

PortA – 172.16.16.16

Displays local IP address that will be assigned to L2TP server.

Assign IP

192.168.1.10 – 192.168.1.100

Specify IP address range if L2TP server has to lease IP Addresses.

Client Information

Primary DNS Server

4.2.2.2

Secondary DNS Server

8.8.8.8

 

Click ‘Apply’ button and the L2TP configuration will be added successfully.


Step 2
: Add Member
 
Define L2TP Member from VPN à L2TP à Configuration.
 
Click ‘Add Members’ button to add user or user groups to L2TP members list. A pop-up window is displayed to select the users. You can also select multiple users or user groups who are to be allowed access through L2TP Connection.
 
 
 
Click ‘Apply’ button to add these users and user groups to the L2TP members list.
 

Step 3: Create L2TP Connection

Create L2TP Connection from VPN ® L2TP à Connection and click on “Add” button with the following values:
 
 

Parameters

Value

Name

Branch

Policy

Default L2TP

Action on VPN Restart

Respond Only

Authentication Details

Authentication Type

Preshared Key

Preshared Key

Specify the preshared key to be used

Confirm Preshared Key

Confirm the preshared key to be used

Local Network Details

Local WAN Port

PortB - 203.88.140.124

Select local server

Remote Network Details

Remote Host

*

Specify IP address of remote peer/host. Specify * for any IP address. 

Allow NAT Traversal

Enabled

Remote LAN Network

Select IP addresses and netmask of remote network which is allowed to connect to the Cyberoam server through VPN tunnel.

Quick Mode Selectors

Local Port

1701

Remote Port

Specify Remote Port for TCP or UDP.

Enter ‘*’ as the value for Remote Port. The reason is that Apple devices try to connect from a higher range of port. 

 
 
Note:

It is not necessary to define Local ID and Remote ID in L2TP configuration.


Step 4: Activate Connection
 
Go to VPN à L2TP à Connection and click on “Red” button under Active Status to activate the connection. Once the status is activated, button will be changed to green.
 
 

Apple iPad Configuration

Configure Apple iPad device with the following Configuration:

Step 1

Click on the main menu of iPad and Go to Settings --> General --> Network.
 
 

Step 2

Then Click on VPN à Add VPN Configuration and make sure to turn the VPN ON.
 

 
Enter the details as shown below:
 

Parameters

Value

L2TP

Description

Cyberoam iPad L2TP

Server

203.88.140.124

Account

cyberoam

Password

Enter password

Secret

Specify Preshared Key

 


Step 3
 
After the above steps has been performed, set the VPN Connection status to “ON” and the VPN connection will be connected.
 
 

Step 4
 
Go to the Internet Browser on iPad to test whether the connectivity has been established or not.
 
 
                                                                                                      
                                                                                                   Document Version:1.0-24/05/2011
 
 
 
 
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Article ID: 1891