ZyXEL Router Prestige 334 User Manual

Prestige 334 User’s Guide
Chapter 25 Network Address Translation (NAT) 250
Figure 128   Example 3: Menu 15.2
25.5.4  Example 4: NAT Unfriendly Application Programs
Some applications do not support NAT Mapping using TCP or UDP port address translation. 
In this case it is better to use Many-to-Many No Overload mapping as port numbers do not 
change for Many-to-Many No Overload (and One-to-One) NAT mapping types. The 
following figure illustrates this.
Menu 15.2 - NAT Server Setup
         Rule   Start...

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251 Chapter 25 Network Address Translation (NAT)
Figure 129   NAT Example 4
Follow the steps outlined in example 3 to configure these two menus as follows
Figure 130   Example 4: Menu 15.1.1.1 Address Mapping Rule.
After you’ve configured your rule, you should be able to check the settings in menu 15.1.1 as 
shown next.
Note: Other applications such as some gaming programs are 
NAT unfriendly because they embed addressing information in 
the data stream. These applications won’t...

Prestige 334 User’s Guide
Chapter 25 Network Address Translation (NAT) 252
Figure 131   Example 4: Menu 15.1.1 Address Mapping Rules
25.6  Configuring Trigger Port Forwarding 
Enter 3 in menu 15 to display Menu 15.3 — Trigger Port Setup, shown next.
Menu 15.1.1 - Address Mapping Rules
  Set Name= Example4
 Idx  Local Start IP Local End IP   Global Start IP Global End IP   Type
 ---  -------------- -------------- --------------- --------------- ------
  1.  192.168.1.10   192.168.1.12    10.132.50.1...

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253 Chapter 25 Network Address Translation (NAT)
Figure 132   Menu 15.3 Trigger Port Setup
The following table describes the fields in this screen.
      Menu 15.3 - Trigger Port Setup
                                Incoming                 Trigger
   Rule       Name        Start Port   End Port   Start Port   End Port
  ----------------------------------------------------------------------
     1.  Real Audio            6970       7170         7070       7070
     2....

Prestige 334 User’s Guide
Chapter 26 Enabling the Firewall 254
CHAPTER26
Enabling the Firewall
This chapter shows you how to get started with the Prestige firewall.
26.1  Remote Management and the Firewall
When SMT menu 24.11 is configured to allow management (see the Remote Management 
chapter) and the firewall is enabled:
• The firewall blocks remote management from the WAN unless you configure a firewall 
rule to allow it.
• The firewall allows remote management from the LAN. 
26.2  Access Methods
The...

Prestige 334 User’s Guide
255 Chapter 26 Enabling the Firewall
Figure 133   Menu 21.2 Firewall Setup
                  Menu 21.2 - Firewall Setup
     The firewall protects against Denial of Service (DoS) attacks when
     it is active.
     Your network is vulnerable to attacks when the firewall is turned off.
     Refer to the Users Guide for details about the firewall default
     policies.
     You may define additional Policy rules or modify existing ones but
     please exercise extreme caution in...

Prestige 334 User’s Guide
Chapter 27 Filter Configuration 256
CHAPTER27
Filter Configuration
This chapter shows you how to create and apply filters.
27.1  Introduction to Filters
Your Prestige uses filters to decide whether to allow passage of a data packet and/or to make a 
call. There are two types of filter applications: data filtering and call filtering. Filters are 
subdivided into device and protocol filters, which are discussed later.
Data filtering screens the data to determine if the packet...

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257 Chapter 27 Filter Configuration
27.1.1  The Filter Structure of the Prestige
A filter set consists of one or more filter rules. Usually, you would group related rules, e.g., all 
the rules for NetBIOS, into a single set and give it a descriptive name. The Prestige allows you 
to configure up to twelve filter sets with six rules in each set, for a total of 72 filter rules in the 
system. You cannot
 mix device filter rules and protocol filter rules within the same set. You...

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Chapter 27 Filter Configuration 258
Figure 135   Filter Rule Process
You can apply up to four filter sets to a particular port to block multiple types of packets. With 
each filter set having up to six rules, you can have a maximum of 24 rules active for a single 
port.
27.2  Configuring a Filter Set
The Prestige includes filtering for NetBIOS over TCP/IP packets by default. To configure 
another filter set, follow the procedure below. 
1Enter 21 in the main menu to open menu 21. 

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259 Chapter 27 Filter Configuration
Figure 136   Menu 21: Filter and Firewall Setup
2Enter 1 to bring up the following menu.
Figure 137   Menu 21.1: Filter Set Configuration
3Select the filter set you wish to configure (1-12) and press [ENTER].
4Enter a descriptive name or comment in the Edit Comments field and press [ENTER].
5Press [ENTER] at the message [Press ENTER to confirm] to open Menu 21.1.1 - Filter 
Rules Summary.
This screen shows the summary of the existing rules in...