Asus Router RX3141 User Manual

							
 
 
 
RX3141  
 
User’s Manual 
 
 
 
 
  Revision 1.01 
Oct. 21, 2004
   
						

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Table of Contents 
1
 Introduction .............................................. 1 
1.1 Features ................................................................................................................ 1 
1.2 System Requirements .......................................................................................... 1 
1.3 Using this Document ............................................................................................ 2 
1.3.1 Notational conventions ............................................................................... 2 
1.3.2 Typographical conventions ........................................................................ 2 
1.3.3 Special messages ...................................................................................... 2 
2 Getting to Know RX3141 ......................... 3 
2.1 Parts List ............................................................................................................... 3 
2.2 Hardware Features ............................................................................................... 3 
2.3 Software Features ................................................................................................ 3 
2.3.1 NAT Features ............................................................................................. 3 
2.3.2 Firewall Features ........................................................................................ 4 
2.3.2.1 Stateful Packet Inspection ............................................................. 4 
2.3.2.2 Packet Filtering – ACL (Access Control List) ................................ 4 
2.3.2.3 Defense against DoS Attacks........................................................ 4 
2.4.1.1 Application Level Gateway (ALG) ................................................. 5 
2.4.1.2 Log.................................................................................................. 5 
2.4 Finding Your Way Around .................................................................................... 6 
2.4.1 Front Panel ................................................................................................. 6 
2.4.2 Rear Panel.................................................................................................. 7 
2.4.3 Bottom View ............................................................................................... 8 
2.5 Placement Options ............................................................................................... 9 
2.5.1 Desktop Placement .................................................................................... 9 
2.5.2 Magnet Mount Instructions......................................................................... 9 
2.5.3 Wall Mount Instructions: ............................................................................. 9 
3 Quick Start Guide................................... 11 
3.1 Part 1 — Connecting the Hardware ...................................................................11 
3.1.1 Step 1. Connect an ADSL or a cable modem. ........................................11 
3.1.2 Step 2. Connect computers or a Network. ..............................................11 
3.1.3 Step 3. Attach the AC adapter. ................................................................12 
3.1.4 Step 4. Power on RX3141, the ADSL or cable modem and power up 
your computers.........................................................................................12
 
3.2 Part 2 — Configuring Your Computers ..............................................................13  
						

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3.2.1 Before you begin ......................................................................................13 
3.2.2 Windows® XP PCs: .................................................................................13 
3.2.3 Windows® 2000 PCs: ..............................................................................13 
3.2.4 Windows® 95, 98, and Me PCs ..............................................................14 
3.2.5 Windows® NT 4.0 workstations:..............................................................15 
3.2.6 Assigning static IP addresses to your PCs .............................................15 
3.3 Part 3 — Quick Configuration of the RX3141....................................................16 
3.3.1 Setting Up the RX3141 ............................................................................16 
3.3.2 Testing Your Setup ..................................................................................17 
3.3.3 Default Router Settings ............................................................................18 
4 Using the Configuration Manager .......... 19 
4.1 Log into the Configuration Manager...................................................................19 
4.2 Functional Layout ...............................................................................................20 
4.2.1 Menu Navigation ......................................................................................20 
4.2.2 Commonly Used Buttons and Icons ........................................................21 
4.3 Overview of System Configuration.....................................................................22 
5 Router Connection Setup....................... 23 
5.1 LAN Configuration ..............................................................................................23 
5.1.1 LAN IP Address ........................................................................................23 
5.1.2 LAN Configuration Parameters................................................................23 
5.1.3 Configuring the LAN IP Address..............................................................24 
5.2 WAN Configuration .............................................................................................25 
5.2.1 WAN Connection Mode ...........................................................................25 
5.2.2 PPPoE ......................................................................................................26 
5.2.2.1 WAN PPPoE Configuration Parameters.....................................27 
5.2.2.2 Configuring PPPoE for WAN.......................................................28 
5.2.2.3 Configuring PPPoE Multi-session for WAN ................................28 
5.2.3 PPPoE Unnumbered................................................................................31 
5.2.3.1 WAN PPPoE Unnumbered Configuration Parameters ..............32 
5.2.3.2 Configuring PPPoE Unnumbered for WAN ................................33 
5.2.4 Dynamic IP ...............................................................................................33 
5.2.4.1 Configuring Dynamic IP for WAN ................................................33 
5.2.5 Static IP.....................................................................................................34 
5.2.5.1 WAN Static IP Configuration Parameters ...................................34 
5.2.5.2 Configuring Static IP for WAN .....................................................34  
						

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6 DHCP Server Configuration................... 35 
6.1 DHCP (Dynamic Host Control Protocol) ............................................................35 
6.1.1 What is DHCP? ........................................................................................35 
6.1.2 Why use DHCP? ......................................................................................35 
6.1.3 Configuring DHCP Server........................................................................35 
6.1.4 Viewing Current DHCP Address Assignments .......................................37 
7 Configuring Static Routes ...................... 39 
7.1 Overview of IP Routes........................................................................................39 
7.1.1 Do I need to define static routes? ............................................................39 
7.2 Static Route ........................................................................................................40 
7.2.1 Static Route Configuration Parameters ...................................................40 
7.2.2 Adding Static Routes................................................................................41 
7.2.3 Deleting Static Routes..............................................................................42 
7.2.4 Viewing the Static Routing Table.............................................................42 
8 Configuring DDNS ................................. 43 
8.1 DDNS Configuration Parameters.......................................................................44 
8.2 Configuring HTTP DDNS Client .........................................................................45 
9 Configuring Firewall/NAT Settings ......... 47 
9.1 Firewall Overview ...............................................................................................47 
9.1.1 Stateful Packet Inspection .......................................................................47 
9.1.2 DoS (Denial of Service) Protection ..........................................................47 
9.1.3 Firewall and Access Control List (ACL)...................................................47 
9.1.3.1 Priority Order of ACL Rule ...........................................................47 
9.1.3.2 ACL Rule and Connection State Tracking ..................................48 
9.1.4 Default ACL Rules....................................................................................48 
9.2 Router Security Settings.....................................................................................49 
9.2.1 Basic Router Security Configuration Parameters ...................................49 
9.2.2 DoS Configuration ....................................................................................49 
9.2.2.1 DoS Protection Configuration Parameters..................................50 
9.2.2.2 Configuring DoS Settings ............................................................51 
9.3 ACL Rule Configuration Parameters .................................................................52 
9.3.1 ACL Rule Configuration Parameters .......................................................52 
9.4 Configuring Inbound ACL Rules ........................................................................55 
9.4.1 Add Inbound ACL Rules ..........................................................................55  
						

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9.4.2 Figure 9.4. Sample Inbound ACL List TableModify Inbound ACL Rules
..................................................................................................................56
 
9.4.3 Delete Inbound ACL Rules ......................................................................56 
9.4.4 Display Inbound ACL Rules .....................................................................57 
9.5 Configuring Outbound ACL Rules .....................................................................57 
9.5.1 Add an Outbound ACL Rule ....................................................................57 
9.5.2 Modify Outbound ACL Rules ...................................................................58 
9.5.3 Delete Outbound ACL Rules ...................................................................59 
9.5.4 Display Outbound ACL Rules ..................................................................59 
9.6 Configuring Self-Access ACL Rules – (Router Setup Î Self-Access ACL) ......59 
9.6.1 Add a Self-Access Rule ...........................................................................60 
9.6.2 Modify a Self-Access Rule .......................................................................60 
9.6.3 Delete a Self-Access Rule .......................................................................61 
9.6.4 View Configured Self-Access Rules ........................................................61 
9.7 Firewall Log – (Router Setup Î Log) ................................................................61 
9.7.1 Log Format ...............................................................................................62 
10 Virtual Sever and Special Application .... 63 
10.1 NAT Overview.....................................................................................................63 
10.1.1 NAPT (Network Address and Port Translation) or PAT (Port Address 
Translation) ................................................................................................63
 
10.1.2 Reverse NAPT / Virtual Server ................................................................64 
10.2 Configure Virtual Server .....................................................................................64 
10.2.1 Virtual Server Configuration Parameters.................................................64 
10.2.2 Virtual Server Example ............................................................................66 
10.2.3 Special Application Configuration Parameters........................................67 
10.2.4 Special Application Example ...................................................................68 
11 System Management ............................. 70 
11.1 Login Password and System-Wide Settings .....................................................70 
11.2 Viewing System Information...............................................................................72 
11.3 Setup Date and Time .........................................................................................73 
11.3.1 View the System Date and Time .............................................................74 
11.4 Reset to Factory Default Settings ......................................................................74 
11.4.1 Reset to Factory Default Settings using GUI ..........................................74 
11.4.2 Reset to Factory Default Settings using the Reset Button .....................75 
11.5 Firmware Upgrade ..............................................................................................75 
11.6 System Reboot ...................................................................................................78  
						

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11.7 . System Configuration Management ................................................................79 
11.7.1 Backup System Configuration .................................................................79 
11.7.2 Restore System Configuration .................................................................81 
12 IP Addresses, Network Masks, and 
Subnets .................................................. 83
 
12.1 IP Addresses.......................................................................................................83 
12.1.1 Structure of an IP address .......................................................................83 
12.2 Network classes..................................................................................................84 
12.3 Subnet masks .....................................................................................................85 
13 Troubleshooting ..................................... 87 
13.1 Diagnosing Problem using IP Utilities ................................................................88 
13.1.1 ping ...........................................................................................................88 
13.1.2 nslookup ...................................................................................................89 
14 Index ...................................................... 91 
  
						

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List of Figures 
Figure 2.1. Front Panel LEDs...................................................................................................................................6 
Figure 2.2. Rear Panel Connectors .........................................................................................................................7 
Figure 3.1. Overview of Hardware Connections .................................................................................................. 12 
Figure 3.2. Login Screen ....................................................................................................................................... 16 
Figure 3.3. System Status Page ........................................................................................................................... 17 
Figure 4.1. Configuration Manager Login Screen ................................................................................................ 19 
Figure 4.2. Typical Configuration Manager Page................................................................................................. 20 
Figure 4.3. System Information Page ................................................................................................................... 22 
Figure 5.1. Router Connection Setup Configuration – LAN Configuration ..........................................................24 
Figure 5.2. Network Setup Configuration Page – WAN Configuration ................................................................25 
Figure 5.3. WAN – PPPoE Configuration ............................................................................................................. 26 
Figure 5.4. WAN – PPPoE Multi-session Example .............................................................................................. 28 
Figure 5.5. WAN – PPPoE0 Settings ................................................................................................................... 29 
Figure 5.6. WAN – PPPoE1 Settings ................................................................................................................... 29 
Figure 5.7. WAN – First ACL Rule Settings (using network address/subnet mask) for Forwarding Packets to 
PPPOE1 Session........................................................................................................................................... 29
 
Figure 5.8. WAN – Second ACL Rule Settings (using domain name) for Forwarding Packets to PPPOE1 
Session........................................................................................................................................................... 29
 
Figure 5.9. WAN – Outbound ACL Rule Settings for PPPoE Multi-session Example ........................................ 30 
Figure 5.10. WAN – Default Outbound ACL Rule for PPPoE Multi-session Example ....................................... 30 
Figure 5.11. WAN – PPPoE Unnumbered Configuration .................................................................................... 31 
Figure 5.12. WAN – Dynamic IP (DHCP client) Configuration ............................................................................ 33 
Figure 5.13. WAN – Static IP Configuration ......................................................................................................... 34 
Figure 6.1. DHCP Server Configuration Page...................................................................................................... 36 
Figure 6.2. DHCP Lease Table ............................................................................................................................. 37 
Figure 7.1.  Routing Configuration Page .............................................................................................................. 40 
Figure 7.2.  Static Route Configuration................................................................................................................. 41 
Figure 7.3.  Sample Routing Table ....................................................................................................................... 42 
Figure 8.1. Network Diagram for HTTP DDNS .................................................................................................... 43 
Figure 8.2. HTTP DDNS Configuration Page....................................................................................................... 45 
Figure 9.1. Router Security Configuration Page................................................................................................... 51 
Figure 9.2. Inbound ACL Configuration Page ...................................................................................................... 55 
Figure 9.3. Inbound ACL Configuration Example................................................................................................. 56 
 
Figure 9.4. Sample Inbound ACL List Table ................................................................................................. 56 
Figure 9.5. Outbound ACL Configuration Page ................................................................................................... 57 
Figure 9.6. Outbound ACL Configuration Example.............................................................................................. 58  
						

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Figure 9.7. Sample Outbound ACL List Table...................................................................................................... 58 
Figure 9.8. Self-Access ACL Configuration Page ................................................................................................ 60 
Figure 9.9. Self-Access ACL Configuration Example .......................................................................................... 60 
Figure 9.10. Existing Self-Access ACL Rules ...................................................................................................... 61 
Figure 9.11 Sample Firewall Log .......................................................................................................................... 62 
Figure 10.1 NAPT – Map Any Internal PCs to a Single Global IP Address ........................................................ 63 
Figure 10.2 Reverse NAPT – Relayed Incoming Packets to the Internal Host Base on the Protocol, Port 
Number or IP Address ................................................................................................................................... 64
 
Figure 10.3. Virtual Server Example ..................................................................................................................... 66 
 
Figure 10.4. Virtual Server Example – Inbound ACL Rule........................................................................... 67 
Figure 10.5. Special Application Configuration Page ........................................................................................... 68 
Figure 10.6. Special Application Example – Outbound ACL Rule....................................................................... 69 
Figure 10.7. Outbound ACL Rule Table ............................................................................................................... 69 
Figure 11.1. System Administration Configuration Page ..................................................................................... 70 
Figure 11.2. System Status Page ......................................................................................................................... 72 
Figure 11.3. Date and Time Configuration Page.................................................................................................. 73 
Figure 11.4. Factory Reset Page .......................................................................................................................... 74 
Figure 11.5. Factory Reset Confirmation.............................................................................................................. 74 
Figure 11.6. Factory Reset Count Down Timer.................................................................................................... 75 
Figure 11.7. Firmware Upgrade Page .................................................................................................................. 75 
Figure 11.8. File Manager ..................................................................................................................................... 76 
Figure 11.9. Firmware Upgrade Confirmation ...................................................................................................... 76 
Figure 11.10. Firmware Upgrade Status .............................................................................................................. 76 
Figure 11.11. Firmware Upgrade Count Down Timer .......................................................................................... 77 
Figure 11.12. System Reboot Page...................................................................................................................... 78 
Figure 11.13. System Reboot Confirmation ......................................................................................................... 78 
Figure 11.14. System Reboot Countdown Timer ................................................................................................. 78 
Figure 11.15. System Configuration Backup Page .............................................................................................. 79 
Figure 11.16. System Configuration Backup Page – File Download Dialog ....................................................... 79 
Figure 11.17. System Configuration Backup Page – Save As Dialog.................................................................80 
Figure 11.18. System Configuration Backup Status ............................................................................................ 80 
Figure 11.19. System Configuration Restore Page ............................................................................................. 81 
Figure 11.20. System Configuration Restore Page – Choose File Dialog .......................................................... 81 
Figure 11.21. System Configuration Restore Status ............................................................................................ 82 
Figure 13.1. Using the ping Utility ......................................................................................................................... 89 
Figure 13.2. Using the nslookup Utility ................................................................................................................. 90 
  
						

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List of Tables 
Table 2.1. DoS Attacks.............................................................................................................................................5 
Table 2.2. Front Panel Label and LEDs ..................................................................................................................6 
Table 2.3. Rear Panel Labels and LEDs .................................................................................................................7 
Table 3.1. LED Indicators ...................................................................................................................................... 12 
Table 3.2. Default Settings Summary ................................................................................................................... 18 
Table 4.1. Description of Commonly Used Buttons and Icons ............................................................................ 21 
Table 5.1. LAN Configuration Parameters............................................................................................................ 23 
Table 5.2. WAN PPPoE Configuration Parameters ............................................................................................. 27 
Table 5.3. WAN PPPoE Unnumbered Configuration Parameters ...................................................................... 32 
Table 5.4. WAN Static IP Configuration Parameters ........................................................................................... 34 
Table 6.1. DHCP Configuration Parameters ........................................................................................................ 36 
Table 7.1. Static Route Configuration Parameters............................................................................................... 40 
Table 8.1. DDNS Configuration Parameters ........................................................................................................ 44 
Table 9.1. Firewall Basic Configuration Parameters ............................................................................................ 49 
Table 9.2. DoS Attack Definition ........................................................................................................................... 50 
Table 9.3. ACL Rule Configuration Parameters ................................................................................................... 52 
Table 10.1. Virtual Server Configuration Parameters .......................................................................................... 65 
Table 10.2. Port Numbers for Popular Applications ............................................................................................. 65 
Table 10.3. Virtual Server Configuration Parameters .......................................................................................... 67 
Table 10.4. Port Numbers for Popular Applications ............................................................................................. 68 
Table 12.1. IP Address Structure .......................................................................................................................... 83