Siemens 5881 User Manual
SIEMENS 5881 Broadband Internet Router
User’s Guide
User’s Guide
Chapter 6 Security Setup
NAT
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NAT
Network Address Translation (NAT) provides a level of security by hiding the private IP addresses of your LAN
behind the single public IP address of your router. All connections pass through the router and are translated
by NAT. Network addresses on inbound traffic are translated from public to private IP addresses; while
addresses on outbound traffic are translated from private IP addresses to the router’s public IP address.
behind the single public IP address of your router. All connections pass through the router and are translated
by NAT. Network addresses on inbound traffic are translated from public to private IP addresses; while
addresses on outbound traffic are translated from private IP addresses to the router’s public IP address.
This section describes how to perform the following tasks.
Configure NAT
To configure NAT for outbound traffic:
1. Click NAT on the left navigation pane of the Router Information page. This displays the NAT Configuration
page.
2. For NAT Passthrough, select Enable or Disable to specify whether or not multiple VPN clients are
allowed. Enabled, multiple VPN clients are allowed; disabled, only a single VPN client is allowed.
3. Click Apply.
4. In the Outbound NAT Setting section of this page, select Enable or Disable for each of the listed
interfaces to enable or disable NAT for communications for that interface.
Configure passthrough settings and enable or disable NAT for
outbound traffic on an interface.
outbound traffic on an interface.
Configure NAT for inbound traffic.
Configure mapping between private IP addresses and public
IP addresses.
IP addresses.