Firewall Filters and NAT
Firewall Filtering and NAT for Servers on the LAN
This section describes how to set up firewall filters and NAT (network address translation) for servers on
your LAN, using the LAN 2 port setup wizard.
Create firewall filters for LAN users
For added security, you can enable firewall filtering on the LAN 2 port. If you enable the firewall, then you must choose which types of traffic to allow through the firewall on the Internet connection. For example, in order for LAN users to browse the Web, you must enable the WWW firewall filter.
1From Connection Setup dialog box,
2On the first wizard screen, click “Connect to the Internet through a DSL modem”, and then click Next.
3Fill out the IP Address dialog box as appropriate for your scenario, and then click Next.
4Select the Enable Firewall Filters check box.
5Select the check box corresponding to the types of traffic to allow from the LAN to the Internet, and then click Next.
Access internal servers from the Internet
If you have servers on the internal LAN that must be accessible from the Internet (such as a mail server or a WWW server), configure the LAN 2 port to recognize these servers. The router automatically creates NAT (Network Address Translation) map- pings between the IP address the router receives from the ISP and the internal address used for the servers.
1Click the type of server to which the router should allow access from the Internet.
2Type the server IP address, which must be on the same subnet as the address range assigned by your DHCP server.
3Click Next and follow the screen instructions.
Figure 17. Set up a firewall and filters.
Figure 18. Allow access to internal servers from the Internet.
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