Fetching Crls From An Alternate Ldap Server - D-Link DFL-1660 User Manual

9.4.4. Fetching CRLs from an alternate
LDAP server
Example 9.7. Setting Up Config Mode
In this example, the Config Mode Pool object is enabled by associating with it an already configured IP Pool
object called ip_pool1.
Web Interface
1. Go to: Objects > VPN Objects > IKE Config Mode Pool
2. The Config Mode Pool object properties web page now appears
3. Select Use a predefined IPPool object
4. Choose the ip_pool1 object from the IP Pool drop-down list
5. Click OK
After defining the Config Mode object, the only remaining action is to enable Config Mode to be
used with the IPsec Tunnel.
Example 9.8. Using Config Mode with IPsec Tunnels
Assuming a predefined tunnel called vpn_tunnel1 this example shows how to enable Config Mode for that tunnel.
Web Interface
• Go to: Interfaces > IPsec
• Select the tunnel vpn_tunnel1 for editing
• Select the pool in the IKE Config Mode Pool drop down list
• Click OK
IP Validation
NetDefendOS always checks if the source IP address of each packet inside an IPsec tunnel is the
same as the IP address assigned to the IPsec client with IKE config mode. If a mismatch is detected
the packet is always dropped and a log message generated with a severity level of Warning. This
message includes the two IP addresses as well as the client identity.
Optionally, the affected SA can be automatically deleted if validation fails by enabling the advanced
setting IPsecDeleteSAOnIPValidationFailure. The default value for this setting is Disabled.

9.4.4. Fetching CRLs from an alternate LDAP server

A Root Certificate usually includes the IP address or hostname of the Certificate Authority to
contact when certificates or CRLs need to be downloaded to the NetDefend Firewall. Lightweight
Directory Access Protocol (LDAP) is used for these downloads.
However, in some scenarios, this information is missing, or the administrator wishes to use another
LDAP server. The LDAP configuration section can then be used to manually specify alternate
LDAP servers.
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Chapter 9. VPN