Novell NETWARE 6-DOCUMENTATION Manual page 2498

Routing Information Filters
FILER
Purpose
60
Utilities Reference
Routing information filters restrict the exchange of routing information
between routers by limiting the routes added to the routing tables of specified
routers.
These filters increase network security by limiting the visibility of specified
networks. They also reduce the bandwidth used by the periodic exchange of
routing information between routers.
Routing information filters are of two types:
Route advertisement
Route acceptance
When you add a routing information filter, an implicit server filter is also
added for all services residing on the filtered networks.
Use at a workstation to manage files and directories. FILER works with the
file system; it doesn't affect eDirectory objects.
Figure 1 on page 61 shows the functions of FILER.