SMC Networks SMC Barricade SMC7004VBR - Manual (Page 46)

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Remember not to include the address of the Barricade in the client address
pool. Also remember to configure your client PCs for dynamic IP address
allocation.
NAT
Address Mapping
Allows one or more public IP addresses to be shared by multiple internal
users. Enter the Public IP address you wish to share into the “Global IP”
field. Enter a range of internal IPs that will share the global IP into the
“from” field.