Cisco Cisco Firepower Management Center 4000

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FireSIGHT System User Guide
 
Chapter 12      Using NAT Policies 
  Working with Different Types of Conditions in NAT Rules
The list updates as you type to display matching conditions. See 
 for more information.
Step 3
Click a condition in the 
Available Networks
 list. Use the Shift and Ctrl keys to select multiple conditions, 
or right-click and then click 
Select All
Conditions you select are highlighted.
Step 4
You have the following choices:
  •
To match traffic by original destination network, click 
Add to Original
.
  •
To specify the translation value for traffic that matches the translated destination network, click 
Add 
to Translated
.
Alternatively, you can drag and drop selected conditions into the 
Original Destination Network
 or 
Translated 
Destination Network
 lists.
Conditions you selected are added.
Step 5
Optionally, click the add icon (
) above the 
Available Networks
 list to add an individual network object.
For dynamic rules, you can add multiple IP addresses, CIDR blocks, and prefix lengths to each network 
object. For static rules, you can add only a single IP address. Optionally, you can then select the object 
you added. See 
 and 
 for more information.
Step 6
Optionally, click the 
Enter an IP address
 prompt below the 
Original Destination Network
 or 
Translated 
Destination Network
 list, then type an IP address or address block and click 
Add
.
The list updates to display your entry. See 
 for more 
information.
Step 7
Save or continue editing the rule.
You must apply the NAT policy for your changes to take effect; see 
Adding Port Conditions to NAT Rules
License: 
Any
You can add a port condition to a rule to match network traffic based on the original and translated 
destination port and transport protocol for translation. If the original port is not configured, any 
destination port matches the rule. If a packet matches the NAT rule and a translated destination port is 
configured, the system translates the port into that value. Note that for dynamic rules, you can specify 
only the original destination port. For static rules, you can define a translated destination port, but only 
with an object with the same protocol as the original destination port object or literal value.
The system matches the destination port against the value of the port object or literal port in the original 
destination port list for static rules, or multiple values for dynamic rules.
Because static NAT rules are one-to-one translations, the 
Available Ports
 list contains only port objects 
and groups that contain only a single port. For static translations, you can add only a single object or 
literal value to both the 
Original Port
 or 
Translated Port
 lists.
For dynamic rules, you can add a range of ports. For example, when specifying the original destination 
port, you can add 
1000-1100
 as a literal value.