Users Guide

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350 | Virtual Private Networks Dell PowerConnect ArubaOS 5.0 | [User Guide
f. In the Destination NAT IP Address field, enter the destination NAT IP address in dotted-decimal format.
If you do not enter an address into this field, the NAT pool will use the destination NAT IP 0.0.0.0.
g. Click Done to close the NAT pools tab
h. Navigate to Configuration > Advanced Services > VPN Services and click the IPsec tab to return to the
IPsec window.
i. Click the NAT Pool drop-down list and select the NAT pool you just created.
IKE Shared Secrets
You can configure a global IKE key or configure an IKE key for each subnet. Make sure that this key matches the
key on the client.
1. In the IKE Shared Secrets section, click Add to open the Add IKE Secret page.
2. Enter the subnet and subnet mask. To make the IKE key global, specify 0.0.0.0 and 0.0.0.0 for both values.
3. Enter the IKE Shared Secret and Verify IKE Shared Secret.
4. Click Done to apply the configurations.
IKE Policies
1. In the IKE Policies section, click Add to open the IPsec Add Policy configuration page.
2. Set the Priority to 1 for this configuration to take priority over the Default setting.
3. Set the Encryption type from the drop-down menu.
4. Set the HASH Algorithm to SHA or MD5.
5. Set the Authentication to Pre-Share.
6. Set the Diffie Hellman Group to Group 1 or Group 2.
The IKE policy selections, along with the preshared key, need to be reflected in the VPN client configuration.
When using a third-party VPN client, set the VPN configuration on clients to match the choices made above.
In case the Dell dialer is used, these configuration need to be made on the dialer prior to downloading the
dialer onto the local client.
7. Click Done to activate the changes.
8. Click Apply to apply the changes made before navigating to other pages.
Configure the VPN via the CLI
Authentication Method and Server Addresses
vpdn group l2tp
enable
ppp authentication {cache-securid|chap|eap|mschap|mschapv2|pap}
client configuration {dns|wins} <ipaddr1> [<ipaddr2>]
Address Pools
ip local pool <pool> <start-ipaddr> <end-ipaddr>
Source NAT
ip access-list session srcnat
user any any src-nat pool <pool> position 1
IKE Shared Secrets
crypto isakmp key <key> address <ipaddr> netmask <mask>