Compatible Systems 5.4 - Manual (Page 95)

Chapter 4 - AppleTalk Routing & Bridging 89
• Setting Lockout causes the router to drop any NBP lookups which are
destined for this physical segment (or AppleTalk Bridge Group). This
will protect devices on the segment from access by users on other
segments.
• If you choose to Lockin lookups, the users on this network segment (or
AppleTalk Bridge Group) will not have access through the router to
network devices on other segments.
Zone Filters
Zone filters are applied based on logical AppleTalk zones rather than on
physical segments. You may choose any or all combinations, depending on
your network security requirements.
On AppleTalk Phase 1 networks and LocalTalk networks, zone filters are
applied for the AppleTalk zone configured for the network segment. On
AppleTalk Phase 2 networks, they are applied to the AppleTalk default zone
configured for the network segment. For more information about creating a
zone name on this port’s network segment, see the AppleTalk Routing
configuration screen for this interface.
• Stay In Zone means the router will not forward NBP lookups which are
directed from the AppleTalk zone configured for this port’s network
segment to any other zone.
• The LaserWriter filter protects all LaserWriters in the AppleTalk zone
configured for this port’s network segment from NBP lookup by
computers in other AppleTalk zones.
• The Tilde filter protects all devices in the AppleTalk zone configured for
this port’s network segment whose names end with a tilde (~) character
from NBP lookup by computers in other AppleTalk zones.
v Note: In order for Zone Name filters to work, the NBP lookup packets must
pass through the router. This means that lookups between AppleTalk Phase 2
zones which are on the same network segment cannot be filtered in this
fashion.