User's Manual

Prestige 645 ADSL Internet Access Router
8-18 Filter Configuration
Figure 8-15 Example Filter Rules Summary – Menu 21.3
After you’ve created the filter set, you must apply it.
Step 1. Enter 11 from the main menu to go to menu 11.
Step 2. Select a remote node number and press [ENTER].
Step 3. Go to the Edit Filter Sets field, press the [SPACE BAR] to select Yes and press [ENTER].
This brings you to menu 11.5. Apply the TELNET_WAN filter set (filter set 3) as shown later.
8.5 Filter Types and SUA
There are two types of filter rules, Device Filter (Generic) rules and Protocol Filter (TCP/IP and IPX)
rules. Device Filter rules act on the raw data from/to LAN and WAN. Protocol Filter rules act on the IP
and IPX packets. When NAT/SUA (Network Address Translation/Single User Account) is enabled, the
inside IP address and port number are replaced on a connection-by-connection basis, which makes it
impossible to know the exact address and port on the wire. Therefore, the Prestige applies the protocol
Menu 21.3 - Filter Rules Summary
# A Type Filter Rules M m n
- - ---- --------------------------------------------------------------- - - -
1 Y IP Pr=6, SA=0.0.0.0, DA=0.0.0.0, DP=23 N D F
2 N
3 N
4 N
5 N
6 N
Enter Filter Rule Number (1-6) to Configure: 1
This shows you that you have
configured and activated (A =
Y) a TCP/IP filter rule (Type =
IP, Pr = 6) for destination
telnet ports (DP = 23).
M = N means an action can be taken
immediately. The action is to drop the
packet (m = D) if the action is matched and
to forward the packet immediately (n = F) if
the action is not matched no matter whether
there are more rules to be checked (there
aren’t in this example).