User guide

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Advanced IP Filtering Page
This page allows you to define which local PCs will be denied access to the
CH6640E/CG6640E WAN. You can configure IP address filters to block Internet traffic to
specific network devices on the LAN by entering start and end IP address ranges. Note
that you only need to enter the LSB (Least-significant byte) of the IP address; the upper
bytes of the IP address are set automatically from the CH6640E/CG6640E Configuration
Manager’s IP address.
The Enabled option allows you to store filter settings commonly used but not have them
active.
Field Descriptions for the Advanced IP Filtering Page
Field Description
Start Address
Enter the start IP address range of the computers for which you
want to deny access to the CH6640E/CG6640E WAN.
End Address
Enter the end IP address range of the computers you want to deny
access to the CH6640E/CG6640E WAN.
Enabled Activates the IP address filter, when selected.
Checkmark Enabled for each range of IP addresses you want to
deny access to the CH6640E/CG6640E WAN.
Delete
Remove the IP address filter, when selected.
Checkmark Delete for each range of IP filter you want to remove.
When done, click Apply to activate and save your settings.
Advanced MAC Filtering Page
This page allows you to define up to twenty Media Access Control (MAC) address filters
to prevent PCs from sending outgoing TCP/UDP traffic to the WAN via their MAC
addresses. This is useful because the MAC address of a specific NIC card never
changes, unlike its IP address, which can be assigned via the DHCP server or hard-
coded to various addresses over time.