CyberGuard SG300 User Manual page 147

Source NAT
Source NAT alters the source address of packets received by the CyberGuard SG
appliance. This is typically used for fine tuning the CyberGuard SG appliance's
masquerading behaviour.
See the Masquerading section later in this chapter for information on altering the basic
masquerading relationships between your CyberGuard SG appliance's interfaces.
Click Source NAT. Any rules that have already been defined are displayed, you may
Edit or Disable/Enable these rules by clicking the appropriate icon. Click New to add a
new rule.
You may also add a new rule above an existing one by clicking the Add Above icon, or
below with Add Below.
Note
The first matching rule determines the action for the network traffic, so the order of the
rules is important. You can use the Move Up and Move Down icons to change the order.
The rules are evaluated top to bottom as displayed on screen.
The following fields are displayed:
Enable Uncheck to temporarily disable this rule
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Firewall