Digi TransPort WR11 User Manual page 277

Configuring network interfaces
Mask
The IP netmask for the Remote network. Use this setting to create a dynamic route to the
remote network whenever the ISDN interface is active.
Primary DNS server
The answering ISDN interface would normally supply its own PPP IP address to the peer for
DNS requests. This parameter allows you to specify an alternative DNS IP address.
Secondary DNS server
A secondary DNS server IP address to the peer for DNS requests, if required.
Enable NAT on this interface
Enables or disables IP Network Address Translation (NAT) on the answering ISDN interface.
When enabled, displays the following options:
IP Address
Enable standard Network Address Translation (NAT).
IP address and Port
Enable Network Address and Port Translation (NAPT).
Enable IPsec on this interface
Enables or disables IPSec processing on the ISDN interface. If enabled, packets sent or
received on this interface must pass through the IPSec code before being transmitted. IPSec
may drop the packet, pass it unchanged, or encrypt and encapsulate within an IPSec packet.
When enabled, displays the following parameters:
Keep Security Associations (SAs) when this ISDN interface is disconnected
Configures the router to keep any existing IKE and IPsec associations should the link drop. This
is usually applied on head-end routers with fixed IP addresses.
Use interface X, Y for the source IP address of IPsec packets
By default, the source IP address for an IPSec Eroute is the IP address of the interface on
which IPSec was enabled. By setting this parameter to either a PPP or Ethernet interface, the
source IP address IPSec uses will match that of the specified Ethernet or PPP interface.
Enable the firewall on this interface
Enables or disables the Firewall script processing for the mobile interface.
Note If the firewall is enabled on an interface and with the absence of any firewall rules, the
default action is to block ALL traffic. To configure the firewall, see Firewall.
3. Click Apply.
Digi TransPort® Routers User Guide
Configure ISDN interfaces
277