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Configuring an Interface with NAT
This section describes how to configure an interface with NAT. It also includes information about:
•
"Adding Default rules" on page 739
•
"Adding a Rule to an interface" on page 740
•
"Modifying a Rule to an Interface" on page 741
•
"Deleting a Rule to an Interface" on page 742
•
"Configuring the Rule order" on page 742
•
"Examples of common NAT configurations" on page 743
Adding Default rules
1
On the navigation tree, click the Services key and click the NAT key.
2
Click the interface you want to configure. For example: LAN1.
The Rule Order screen appears.
Note: Rules can be configured in several ways, using default rules, setting up
individual rules or a combination of the two.
3
Click the Default Rules box and click Disabled, Enabled - include IP phones, or
Enabled - do not include IP phones.
If you choose Enabled - include IP phones, the NAT default rules apply to all data traffic
including IP telephony traffic.
There are three default rules set. The first rule is for outbound TCP/UDP traffic. The second
rule is for outbound IP traffic. The third rule is for inbound TCP/UDP traffic on port 7000. The
IP address for the Public address is the IP address of the interface you configure. The system
automatically fills in the rule order. If you choose to add additional rules, the default rules still
remain.
If you choose Enabled - do not include IP phones, the NAT default rules do not apply to IP
telephony traffic, but does apply to all other traffic.
If you choose this option, there are two default rules set. One is for outbound TCP/UDP traffic.
The other is for outbound IP traffic. The IP address for the Public address is the IP address of
the interface you configure. The system automatically fills in the rule order. If you choose to
add additional rules, the default rules still remain.
If you choose Disabled, the Default Rules are removed.
The default is Disabled.
Note: The default rules are only for traffic initiated in the outbound direction. You
must add rules for inbound traffic or packets will pass in without translation.
Configuring an Interface with NAT
Programming Operations Guide
739
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