Configure Advanced interfaces settings
Digi TransPort User Guide
297
Enable NAT on this interface
When enabled, causes the router to apply Network Address Translation (NAT) to IP packets on
this interface. When enabled, the following additional parameters appear:
IP address/IP address and Port
These radio buttons select whether IP address translation only should be applied or whether
port number translation should also be applied to IP packets.
NAT Source IP address a.b.c.d
The IP address of the interface that should be used as the source address in IP packets
crossing the NAT interface.
Enable IPsec on this interface
When enabled, causes the router to use the IPsec protocol to secure the connection.
When enabled, the following additional parameters are displayed:
Keep Security Associations (SAs) when this PSTN interface is disconnected
When enabled, causes the router to maintain (such as not flush) the SA when the interface
becomes disconnected. The normal behavior is to remove the SAs when the interface
becomes disconnected.
Use interface x,y for the source IP address of IPsec packets
If it is required to use another interface (such as not the interface currently being configured)
as the source address for IPsec packets, this may be achieved by selecting the desired
interface from the drop-down list and typing the desired interface instance number into the
adjacent text box.