Firewall
Advanced Firewall Settings
Cisco RV220W Administration Guide 83
4
• Session Settings, page 91
• Internet Group Management Protocol (IGMP), page 92
• SIP ALG, page 93
One-to-One Network Address Translation (NAT)
One-to-one NAT is a mechanism that maps public IP addresses to the private IP
addresses of devices that are behind a firewall.
• Managing One-to-One NAT Rules, page 83
• Adding or Editing a One-to-One NAT Rule, page 84
Managing One-to-One NAT Rules
Use the Firewall > Advanced Settings > One-to-One NAT page to view, add, edit,
and delete One-to-One NAT Rules.
To open this page: In the navigation tree, choose Firewall > Advanced Settings >
One-to-One NAT.
The One-to-One-NAT Rules Table lists the available One-To-One NAT rules that
have been configured. It displays the following fields:
• Private Range Begin—The starting IP address in the private (LAN) IP
address.
• Public Range Begin—The starting IP address in the public (WAN) IP
address.
• Range Length—Range length maps one to one private address to public
address up to the given range.
• Service—Shows configured services. Services for one-to-one NAT allow
you to configure the service to be accepted by the private IP (LAN) address
when traffic is sent to the corresponding public IP address. Configured
services on private IP addresses in the range are accepted when traffic is
available on the corresponding public IP address.
Perform these tasks:
• To add a one-to-one NAT rule, click Add. Then enter the settings on the Add/
Edit One-to-One NAT Configuration page. See Adding or Editing a One-to-
One NAT Rule, page 84.
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