Here you can optionally specify a loopback address for the device to use as the target address instead of the one that would normally be selected automatically.
Note: If the list of IP networks or loopback addresses contains an entry named "DMZ" then the associated IP
				address will be used.
			Important: If the source address set here is a loopback address, this will be used unmasked even on masked remote
				clients.
		- SNMP ID:
 - 2.2.35.10
 - Console path:
 - Setup > WAN > L2TP-Endpoints
 - Possible values:
 Name of the IP networks whose address should be used, any valid IP address, or the name of a loopback address.