
Configuring AppleTalk Services
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Using AppleTalk Zone Filters
Bay Networks AppleTalk zone filters let network administrators control the zone
information that Bay Networks routers distribute, providing a level of security
unavailable through the standard AppleTalk protocol.
The Bay Networks AppleTalk implementation lets you configure zone filters on a
per-interface basis. Use zone filters to
• Impose network security.
Zone filters can impose security measures by controlling which AppleTalk
zones and networks are accessible to endstations on the network.
• Simplify a user’s network access.
Zone filters can screen out unwanted zones and reduce the number of zones
on a user’s Chooser.
You configure zone filters by constructing an Include, Exclude, 5.X Include, or
5.X Exclude zone filter list for an interface.
• When you configure an Include zone filter list, the interface advertises that it
can reach only those zones specified on the list. This type of filter is useful if
you want to filter out most of the zones that the router knows about.
• When you configure an Exclude zone filter list, the interface advertises that it
can reach all zones except those specified on the list. This type of filter is
useful if you want to filter out only a few of the zones that the router knows
about.
• When you configure a 5.X Include or 5.X Exclude zone filter list, the interface
advertises that it can reach only those zones allowed or denied on the list.
However, the interface will advertise all networks, regardless of the zones in
its zone filter list.
For instructions on configuring zone filters, see “Configuring AppleTalk Zone
Filters” in Chapter 4.
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