WESM zl Management and Configuration Guide WT.01.28 and greater

8-33
Configuring Network Address Translation (NAT)
Configuring NAT
Figure 8-20. Add Static Translation Screen
3. In the NAT section, select the Interface Type and Address Type:
a. The Interface Type determines to which interfaces the Wireless Edge
Services zl Module applies the static NAT definition:
– Outside (Public)—incoming traffic on an outside interface
– Inside (Private)—incoming traffic on an inside interface
b. For the Address Type, select Destination—the module translates the desti-
nation IP address in the IP header.
The correct settings depend, of course, on the goal of the NAT configuration and
on how you have defined interfaces in your network.
Remember: destination NAT allows client traffic to reach servers at public IP
address, and servers are typically in your wired network. If you define VLANs
for wired servers as outside interfaces, you should define VLANs for wireless
traffic as inside interfaces. Then select Destination for the Address Type and
Inside(Private) for the Interface Type. On the other hand, you might define
VLANs for wireless traffic as outside interfaces. In this case, select Destination
for the Address Type and Outside(Public) for the Interface Type. In either case,
NAT applies to traffic from wireless stations destined to wired servers.
See the “Static, or One-to-One, NAT” on page 8-7 and “Planning the NAT
Configuration” on page 8-13 for more guidelines on choosing these settings.
4. Select either TCP or UDP in the Protocol drop-down menu.