Nortel 6220 User Manual page 76

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Setup... are not applied to wireless-only traffic in the non-filtering ISP
Secure Data Mode Base Station Mode.
We strongly recommend that you set your Secure Data Mode Base
Station to ISP Base Station with Protocol Filtering mode when
connecting Windows PC Client satellites.
ISP Base Station with Protocol Filtering
Selecting this Secure Data Mode Base Station Mode gives you the same
functionality of the ISP Base Station mode, with an added filtering
function that applies the bridge filters set in Bridge Setup to traffic sent
over the wireless network as well.
With the non-filtering ISP Secure Data Mode Base Station Mode, all
traffic between two wireless stations is permitted. Bridge filters do not
apply to wireless-only traffic in the non-filtering ISP Secure Data Mode
Base Station Mode.
When using the ISP Base Station with the Protocol Filtering setting, you
can set the bridge filters so that each wireless machine (or LAN behind
another connected Secure Data Mode Station) is 'hidden' from all other
machines or LAN's connected to the Secure Data Mode Network.
Properly setting up Protocol Filtering will disable the Windows 'Network
Neighborhood' from seeing other machines connected on the wireless
network.
If you do not deny IP and IP-ARP packet types in Protocol Filtering,
wireless machines are still able to connect to each other via IP packets,
including TCP and UDP. Permitting only IP traffic over the wireless
network will allow your wireless clients to interact as if they were
connected to the Internet, but not together on a private network. For
added security, the firewall features of the bridge can be used to deny
certain types of IP packets from flowing between the wireless stations.
We strongly recommend that you select ISP Base Station with Protocol
Filtering when the Secure Data Mode Base Station will service satellites
running the PC Client.
CSU Secure Data Mode-- Selecting this option in IEEE 802.11 sets the
Secure Data Mode Station to Connect to an APU Secure Data Mode
Station over this 802.11 device's radio interface.
To properly use this setting, you must be sure that the following items
match the APU Secure Data Mode Station Settings:
Network ID(NWID)
System Access Pass phrase
WLAN Cable Access Point 6220 CSU NTPM99CA Rel 2.0 Issue 5 Dec 2005