Secure Computing SG550 Bedienungsanleitung PDF herunterladen (Seite 152)

Firewall

148

Descriptive Name An arbitrary name for this rule

Enable Uncheck to temporarily disable this rule

Private Address The private address to change

Public Address The public address, typically a WAN interface alias

Public Interface Select the interface on which the public address

resides, this is typically Internet

Note

When adding a rule, you may either use Predefined addresses that have been added

under Definitions, or click New to manually enter an address.

Masquerading

Masquerading is a form of source network address translation (NAT). It translates many

addresses (such as private LAN IP addresses) into a single address (such as the

external Internet IP address).

Masquerading has the following advantages:

• All machines on the local network can access the Internet using a single ISP

account.

• Only one public IP address is used and is shared by all machines on the local

network. Each machine has its own private IP address.

The firewall remains active when masquerading is disabled.

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Secure Computing SG550 Bedienungsanleitung Seite 152