5.6.2 PORT FILTERING
In some instances it is necessary to configure Port Forwarding on the router. IP Filtering allows this
function, but the port that is going to be forwarded does need to be opened as shown in Section 5.5.2
Port Forwarding is configured on the Incoming IP Filtering screen.
By default the 6401 will allow devices connected to its Ethernet ports to go out to the Internet, and by
default it will block most incoming ports such as port 23 Telnet etc.
To allow incoming services such as Telnet / FTP to pass through the router to specific hosts, its
necessary to configure port forwarding.
Port forwarding is a way of allowing known TCP/UDP port to go to known IP Addresses.
Here we list a port number that we want to pass through the router, and also configure the IP
Addresses that we will send those ports to. So for example we may want to allow FTP (Port 20) to go
to IP address 192.168.25.2, so against that IP address we add the various TCP/IP ports we want to
access that IP Address.
A list of port numbers and services can be found in the appendix at the back of this manual
5.6.3 MAC FILTERING
Before the network manager can configure MAC Filtering Bridging must be configured.
MAC Filtering Setup
MAC Filtering is only effective on ATM PVCs configured in Bridge mode. FORWARDED means
that all MAC layer frames will be FORWARDED except those matching with any of the specified
rules in the following table. BLOCKED means that all MAC layer frames will be BLOCKED except
those matching with any of the specified rules in the following table.
MAC Filtering Policy For Each Interface:
WARNING: Changing from one policy to another on an interface will cause all defined rules for that
interface to be REMOVED AUTOMATICALLY! You will need to create new rules for the new
policy.
On entering the MAC Filtering page, if the 6401 Rugged ADSL Router has Bridging configured the
following table will appear
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