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3-4
C
3: M
HAPTER
ANUAL SETUP
Restricting LAN Access
Canned Filters
The Spanning Tree Priority is the priority assigned to a bridge that is running the
Spanning Tree Protocol. It is used for prioritizing the bridges when Spanning Tree
is enabled.
To change the Spanning Tree Priority, use the command:
set bridge spanning_tree_priority <priority value>
Access to the bridging functions of the 3Com HomeConnect ADSL Modem
Ethernet can be restricted to certain MAC addresses by using the Access MAC
Address feature. When enabled, only packets sourced by or destined for
workstations with MAC addresses in the Access MAC Address Table will be
bridged.
To add a MAC address to the Access MAC Address Table, use the command:
add bridge access_mac_address <mac _addr>
Note: the mac address should be entered in the form: xx.xx.xx.xx.xx.xx
To delete a MAC address from the Access MAC Address Table, use the
command:
delete bridge access_mac_address <mac _addr>
To enable the use of the Access MAC Address feature, use the command:
enable bridge access_mac_addresses
To disable the use of the Access MAC Address feature, use the command:
disable bridge access_mac_addresses
The 3Com HomeConnect ADSL Modem Ethernet provides sophisticated generic
filtering capabilities. Normally, filters must be created with a text editor, copied to
the unit, and applied to the appropriate interface or bridge port. This process is
described in the chapter on Filtering.
To simplify this process, several pre-programmed filters installed in the unit. These
"canned" filters allow or restrict certain common protocols from being
transported over a Bridge WAN port. The filters can be applied to a Bridge WAN
port with a single command.
The following canned filters are pre-programmed:
Table 3-1 Pre-Programmed Filters
Filter Name
NO_IP
NO_IPX
NO_IP_IPX
ONLY_IP
ONLY_IPX
ONLY_IP_IPX
ONLY_PPPOE
To apply a canned filter to a bridge port, use the command:
Function
Do not allow IP packets
Do not allow IPX packets
Do not allow IP or IPX packets
Only allow IP packets
Only allow IPX packets
Only allow IP or IPX packets
Only allow PPP-Over-Ethernet packets
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