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Chapter 9

Configuring Network Address Translation

57

Chapter 9

Configuring Network Address Translation

In this chapter, we will illustrate on how you can host some Internet Servers on your LAN via
the use of Compex WP11A+ configuration interface.

Before you attempt any NAT or Filtering configurations, you should ensure the Compex
WP11A+ is ready for basic Internet access on LAN.

9.1

NAT and Virtual Server

Compex WP11A+ comes with a simple Network Address Translation (NAT) Firewall
protection for your LAN. It uses a mechanism that substitutes a Private IP address with
a Public IP address when a packet leaves the Private network; and restore the
destination Public IP address with the Private IP address when the packet enters the
Private network. With NAT firewall, you can protect your LAN from unauthorized
access from the WAN.

One feature of the NAT is that any unauthorized requests from the Internet will not be
allowed to pass through Compex WP11A+. Hence, with NAT, you can host a Virtual
Server on the LAN. NAT works by translating packets of Private IP addresses to appear
as originating from a single Public IP address; thus allowing multiple PCs in the LAN to
appear as one PC to the WAN interface.

The implementation of a Virtual Server allows Internet servers such as Web Server,
FTP Server and Mail Server to be hosted on your network. It is able to support both Port
Forwarding and IP-Forwarding Servers.

NOTE

Note that static IP supports IP Forwarding only.

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Содержание WP11A+

Страница 1: ......

Страница 2: ...al Revision by Ong Manual Number U 0356 V1 1C Version 1 1 October 2002 Disclaimer Compex Inc provides this manual without warranty of any kind either expressed or implied including but not limited to...

Страница 3: ...dealer or an experienced radio TV technician for help Caution Exposure to Radio Frequency Radiation To comply with the FCC RF exposure compliance requirements the following antenna installation and de...

Страница 4: ...This Class B digital apparatus complies with Canadian ICES 003 Declaration of Conformity Compex Inc declares the following Product Name Compex 11Mbps Wireless LAN Access Point Model No WP11A conforms...

Страница 5: ...a Unit A Anaheim CA 92807 USA Call Fax Tel Tel Fax BBS 1 714 630 7302 8 a m 5 p m Pacific time 1 800 279 8891 Ext 122 Technical Support 1 714 630 6521 1 714 630 2570 24 hour access Europe Write ReadyL...

Страница 6: ...our operating system s documentation for networking How to Use this Document The document is written in such a way that you as a user will find it convenient to find specific information pertaining to...

Страница 7: ...1Mbps High Rate Communication 2 1 3 3 Wire Equivalent Privacy WEP 2 1 3 4 Wireless Ethernet Transparent Bridging 2 1 3 5 Broadband Internet Sharing 2 1 3 6 LAN to LAN Bridging 3 1 3 7 Upgradeable Firm...

Страница 8: ...ess Routing Client 39 7 2 Configuring Compex WP11A as Wireless Routing Client through Web Interface 41 Chapter 8 Configuration on Various WAN Type 44 8 1 Configuring Static IP Connection 44 8 2 Config...

Страница 9: ...s 71 13 5 Reboot System 72 13 6 Change Password 73 13 7 Logout 74 13 8 Exit uConfig 74 Chapter 14 Using HELP menu 76 14 1 Get Technical Help 76 14 2 About System 77 14 2 1 AP Bridge AP Client Mode 77...

Страница 10: ...and Commands on Telnet Interface 86 AIII 1 Telnet Interface Configuration 86 AIII 2 Command Line Interface Commands List 87 AIII 3 How to recover Compex WP11A from failed firmware 88 AIII 4 If you hav...

Страница 11: ...ng the web sending e mail or downloading a program while in the garden near your swimming pool or anywhere in your house is now a reality With the many benefits that a wireless network environment bri...

Страница 12: ...th the older 2Mbps and 1Mbps standard 1 3 3 Wire Equivalent Privacy WEP Compex WP11A uses a private encryption key to ensure data security This is commonly referred to as Wire Equivalent Privacy WEP C...

Страница 13: ...le Firmware Compex WP11A is specially designed with a flash ROM that allows you to update the Compex WP11A with the latest firmware release via a web based configuration interface 1 3 8 Web Based Inte...

Страница 14: ...4b Side view of Compex WP11A Section 1 Figure 1 4c Side view of Compex WP11A Section 2 Figure 1 4dConnection to indoor antenna 10 13 11 12 WA HGA 5 sold separately Connecting WA HGA 5 to WP11A will i...

Страница 15: ...ing at 100Mbps 5 COL LED Steady Green Light Collision occurs at the network segment 6 FDX LED Steady Green Light Network is in Full Duplex Mode No Light Network is in Half Duplex Mode 7 WLAN Speed LED...

Страница 16: ...CIA Card to support wireless client 11 5V DC 2 1A Accepts 5V DC 2 1A input 12 RJ45 Ethernet Port 10Base T or 100 Base TX Port connects to cable modem or xDSL modem 13 Reset Button Compex WP11A will re...

Страница 17: ...CCK 11Mbps 5 5Mbps DQPSK 2Mbps DBPSK 1Mbps Private Encryption 64 bit or 128 bit WEP selectable Operating Mode AP Mode AP Client Mode Gateway Mode and Wireless Routing Client selectable AP Mode WAN In...

Страница 18: ...ng Router s Clock Configuration Interface Remote Router Management RJ45 10 100Mbps port Per Node Per Group All Classful Classless subnet Yes with DHCP reservation Port Forwarding and IP Forwarding Yes...

Страница 19: ...iguration Software Clip holder stand 2 2 Setup Considerations The following are the setup considerations you need to take note of before connecting the Compex WP11A to your network 2 2 1 Software requ...

Страница 20: ...Compex WP11A please follow the steps listed below 1 Snap the Compex WP11A onto the clip holder stand as shown in Figure 3b Figure 3b Illustration on using Clip holder Stand Clip it directly onto the v...

Страница 21: ...your PC to the Ethernet port of Compex WP11A using an MDIX UTP RJ45 cable Please note that before your PC can access to the Internet the NIC adapter and TCP IP protocol have to be installed and config...

Страница 22: ...this program is that it does not require any alteration to the TCP IP configuration on your computer Connect the WP11A to your computer via a crossover UTP cable As pre configuration of TCP IP is not...

Страница 23: ...I 3 Click on the OpenWeb button and the system will automatically link you to Compex WP11A s authentication page as shown in Figure 4 1b Figure 4 1b Log in to Compex WP11A This window lists all Networ...

Страница 24: ...section on Page 73 The main menu screen will be displayed as shown in Figure 4 1c Figure 4 1c Compex WP11A Configuration Interface From here you will able to see three different window frames on the...

Страница 25: ...tem s Clock Firmware Update Save or Reset Settings Reboot System Change Password Logout HELP menu Contact information of a technical support engineer Get Technical Support About System Gateway Mode 4...

Страница 26: ...stem Change Password Logout HELP menu Get Technical Support About System With this user friendly web based configuration interface all configurations on the Compex WP11A can now easily be achieved all...

Страница 27: ...tes domain names into IP addresses If your WAN connection is using Static IP you should configure the primary and secondary DNS IP addresses with the DNS information provided by your Broadband Interne...

Страница 28: ...id connection with an incorrect profile 5 2 Configuring DHCP Server You may configure the built in DHCP Server of the Compex WP11A to release a specific IP address to a specific computer via the web b...

Страница 29: ...Hardware Address To add an entry 1 Click Add button to create an entry into the DHCP Server Reservations 2 After the address is entered click Apply button to make the updates effective You need to reb...

Страница 30: ...VLAN This restricts communication between wireless clients of different Pseudo VLAN while retaining wireless accessibility to the network resources The subnet view illustrates Pseudo Group 1 Group 2...

Страница 31: ...to Ethernet Bridging Starting Point The default mode for Compex WP11A is in AP Bridge therefore no further configuration is required 1 Activate uConfig program Click on OpenWeb button You are now in...

Страница 32: ...hown in Figure 5 3d will appear Figure 5 3d Selection of Network Mode 3 Enter the Access Point Setup parameters for your network An example is shown in Figure 5 4e with these parameters entered Exampl...

Страница 33: ...sconnected RTS Threshold The RTS Threshold limits the length of the RTS frame that is used to initiate a transmission Please do not change this field unless you are familiar with IEEE 802 11 standard...

Страница 34: ...below and click the Apply button Figure 5 3f Defining Access Control 5 Add in the MAC Address of those wireless clients into the various groups For the example illustrated in Figure 5 3b you need to...

Страница 35: ...y button as shown in Figure 5 4h Figure 5 3h Adding MAC address 7 Next you have the option to choose either 64 bits or 128 bits WEP Encryption Select your option and click the Apply button Figure 5 3i...

Страница 36: ...button Reboot the device Figure 5 3k Defining the key for 128 bit WEP 9 Click on the Save button and then reboot Compex WP11A for the changes to take effect To delete a client from the Pseudo Group If...

Страница 37: ...ting The combinations can be summarized in the table below No Pseudo VLAN WEP encryption method 1 Disable Disable 2 Disable 64 bit 3 Disable 128 bit 4 Per node Disable 5 Per node 64 bit 6 Per node 128...

Страница 38: ...ompliant Access Point to perform transparent Bridging between two Fast Ethernet networks The following physical layout of a Wireless LAN to LAN Bridge shows Compex WP11A functioning as an ESS Client p...

Страница 39: ...5 4b Figure 5 4b Selection of Network Mode 3 Click on the Apply button The system will prompt you to reboot your system 4 Go to uConfig program and wait for the system to refresh the screen Click on t...

Страница 40: ...ad Sequence Spectrum DSSS technology divides the 2 4GHz band into 14 frequency channels where the number of freely se channels is subjected to the local regulations of individual country region namely...

Страница 41: ...A Using Web Interface 31 8 Enter your encryption key The parameters take in hexadecimals Figure 5 4e Encryption entries for 64 bit Figure 5 4f Encryption entries for 128 bit 9 Click on the Save button...

Страница 42: ...ill request for an IP address which will be automatically assigned by your service provider Certain Internet Service Providers require DHCP Client ID before an IP address is released For such cases yo...

Страница 43: ...ure 6 2a Connect Compex WP11A to PC 2 As there are many different brands of broadband modems some broadband modems may provide a straight connect MDI Ethernet cable while some may use a cross connect...

Страница 44: ...a minute or more 8 Next power ON the Compex WP11A When either of the 10M or 100M Ethernet LED lights up this shows that there is a cable connection between the ADSL modem and the Compex WP11A 9 Power...

Страница 45: ...Internet Gateway Assuming that Compex WP11A is in the default setting 1 Activate the uConfig program click on the OpenWeb button 2 Go to the CONFIGURATION menu and click on Mode Selection Select Gate...

Страница 46: ...to uConfig program and click on the OpenWeb button Logon again and now Compex WP11A is in Gateway Mode Figure 6 3b Selection of Network Mode Gateway 4 Next click on the Apply button to proceed to the...

Страница 47: ...Mode section Step 4 on Page 20 6 If you want to configure WAN setup proceed to WAN Setup and the following GUI will appear By default Compex WP11A is pre configured with Dynamic IP which is suitable...

Страница 48: ...rom the Command window you can change the IP address which the uConfig program will trace Figure 6 3e uConfig IP Setup More advanced features can also be configured to Compex WP11A for you to manage t...

Страница 49: ...he Ethernet port of Compex WP11A can be used to connect to other networking devices such as switches to cater for more PCs 7 1 Setting up Compex WP11A as Wireless Routing Client 1 Connect a crossover...

Страница 50: ...M or 100M Ethernet LED lights up this shows that there is a good cable connection between the ADSL modem Compex WP11A and Compex NP16 6 Power ON the PC notebook and the WLAN port LED should light up a...

Страница 51: ...Go to the CONFIGURATION menu and click on Network Mode Selection Select Wireless Routing Client mode and click on the Apply button Next click on the Yes button to reboot the device Figure 7 2a Selecti...

Страница 52: ...the option to choose either 64 bit or 128 bit for WEP Encryption from the WEP Setup as shown below Select your option and click on the Apply button Figure 7 2c Selecting WEP encryption method Tx Power...

Страница 53: ...ryption entries for 64 bit Figure 7 2e Encryption entries for 128 bit 7 Click on the Save button and then reboot to take effect 8 If you want to configure WAN setup proceed to WAN Setup and the follow...

Страница 54: ...he ADSL modem together with the logon account on your PC or notebook Ensure that it can connect successfully before attempting to run it with Compex WP11A For simplicity and illustration purposes it i...

Страница 55: ...your ISP Figure 8 1b WAN Static IP Address Configuration 4 Fill in the required field for the IP address Network Mask and Gateway 5 All these information can be obtained from your ISP Network Adminis...

Страница 56: ...our computer is not able to resolve any web site please verify that your DNS entry of the computer has been defined correctly 8 2 1 How to configure Singapore Cable Vision SCV Service SCV provides a D...

Страница 57: ...dow under the SYSTEM TOOLS menu and enter the required field as shown Figure 8 2b System Identity 3 Click on the Apply button to set the System Identity 4 Reboot your device 5 Now you can start surfin...

Страница 58: ...This procedure assumes you have a login account from SingNet Pacific Internet or QALA DSL broadband service and also all the necessary hardware installation is in place NOTE If you have opted for self...

Страница 59: ...Compex WP11A is up and running you might want to add advanced configurations such as Filtering to better manage your LAN For details refer to the Packet Filtering section on Page 64 Username Enter you...

Страница 60: ...service 1 Select WAN Type and click on the Change button 2 Check the radio button next to the Singapore ADSL and click on the Save button Figure 8 4a WAN Type Singapore ADSL 3 The WAN Setup screen dis...

Страница 61: ...to start surfing the Net In addition you can implement advanced features such as Filtering Packet Filtering on Page 64 to control over your LAN users Internet access 8 5 Configuring for BigPond Austr...

Страница 62: ...ve subscribed to Optus Home in Australia please configure your connection profile using Dynamic IP 3 Fill in the required fields for Username Password and Idle Timeout 4 After you have entered every f...

Страница 63: ...plementation of secure multi protocol Virtual Private Networks VPNs through public data networks such as Internet 1 Click on WAN Setup and click on the Change to select WAN type as PPTP 2 Press the Ch...

Страница 64: ...rname Enter the username of your PPTP subscription Password Enter the password of the username VPN Server Enter the IP Address for VPN server Idle Timeout This field allows you to specify the idling t...

Страница 65: ...of the ADSL technology which delivers high speed data communication to home or business without interfering normal telephone service E speed will connect BruNet users at a higher speed of 128 kbps 25...

Страница 66: ...Save button The configuration page for e Speed will be displayed as follows E Speed serves both business and residential customers Figure 8 7b Types of Service for JTB BruNet e Speed 4 Select the typ...

Страница 67: ...restore the destination Public IP address with the Private IP address when the packet enters the Private network With NAT firewall you can protect your LAN from unauthorized access from the WAN One f...

Страница 68: ...r etc to specific Private IP address in your LAN you can choose to host the servers by using the port Forwarding Virtual server For example suppose that you have a FTP Server with an IP address of 192...

Страница 69: ...ion for example Private IP Address 192 168 168 14 Server Type HTTP 5 Click on the Add button to add the address into the Port based mapping table Known Server It supports a pre defined list of common...

Страница 70: ...for TCP UDP port used by this Virtual Server You can also assign a name to this Virtual Server in the Server Type field Choose a Protocol for this Virtual Server ports e g TCP or UDP By clicking on t...

Страница 71: ...203 100 10 99 4 Click add button to add the address into the IP address mapping table Please note that you must enable the NAT function in the Configuration window if you are using a single IP addres...

Страница 72: ...information which is used for forwarding the information The Routing Information Protocol RIP will receive the routing information from other routers on the network 10 2 Adding Static Routes If you a...

Страница 73: ...reboot your gateway Figure 10 2b Adding Static IP Routing Destination IP Address A remote network IP address to which you want to assign the static route For example if you want to route your WP11A t...

Страница 74: ...defined the users may select to bypass or to block the outgoing packets that do not match the rules Figure 11 1a Adding Filtering Configuration For example assume that a rule has been defined as TCP...

Страница 75: ...range of IP addresses in From and To fields If you have selected Single you only need to enter the specific source IP address in the From field Destination Port Three values are possible for this fie...

Страница 76: ...2 Click on Edit button to activate the action 3 Click Apply button to accept the rule or cancel button to discard the rule 4 To save the rules click the Save or Reset Settings at the Command window on...

Страница 77: ...ome or sales personnel who are mostly away from the office As long you have Internet access at your Remote site you can still manage your network To enable remote management 1 Select Remote management...

Страница 78: ...he System Identity Figure 13 1a System Identity Description To do so 1 Go to System Identity at the Command window 2 Description on the System Name System Contact You may enter the contact person for...

Страница 79: ...tions NOTE To manage and utilize the time based functions provided in the Compex WP11A such as the Filtering functions you MUST set its clock to synchronize with your managing workstation 1 Access the...

Страница 80: ...the Browse button to locate the filename Next click on the Upgrade button to begin the upgrading to the latest firmware revision Follow through the instructions during the upgrading process Once compl...

Страница 81: ...on on a file restore the configuration from a file and reset the configuration back to factory default The Save and Reset Settings allows you to execute the changes or reset the Compex WP11A back to t...

Страница 82: ...ing on this button you will restore Compex WP11A back to the default settings This includes disabling the DHCP Server You will have to re enter all the configuration information for your network 13 5...

Страница 83: ...itive and only ONE password is Needed for all the interfaces Figure 13 6a Changing of Password 1 Click on Change Password at the Command window and key in the entries accordingly 2 Click on the Change...

Страница 84: ...ure 13 7a System prompt to log in again NOTE Do not use the Logon button use uConfig program instead to prevent any conflict in IP Address 13 8 Exit uConfig Upon completion of the Compex WP11A configu...

Страница 85: ...Chapter 13 Using SYSTEM TOOLS menu 75 Figure 13 8a uConfig icon at the taskbar uConfig icon will disappear after clicking on the exituConfig bar...

Страница 86: ...menu 76 Chapter 14 Using HELP menu 14 1 Get Technical Help For more information on Compex s technical support around the world click on the Get Technical Support in the HELP Menu Figure 14 1a Technica...

Страница 87: ...ion of the Compex WP11A by clicking on the About System menu After you have upgraded your firmware in the Compex WP11A you can check for the version 14 2 1 AP Bridge AP Client Mode Figure 14 2a Bridge...

Страница 88: ...tly The AP Mode LED will then light up steadily indicates that Compex WP11A has set to its factory default setting as shown below Operating Mode AP Bridge mode IP address 192 168 168 1 Password passwo...

Страница 89: ...s been pre configured with IP address and Subnet Mask of 192 168 168 1 for AP Bridge and AP Client mode and 255 255 255 0 respectively An Internet browser can be used to configure the Compex WP11A The...

Страница 90: ...selected Then click the Open button In Internet Explorer 1 Select the File menu then select Open 2 In the Open Page dialog box key in the IP address of the Compex WP11A This address is set at the fact...

Страница 91: ...be added to your network folder To configure your TCP IP connection for Compex WP11A please follow the steps listed below If you are using Windows 2000 XP please go to section AII 2 AII 1 Adding TCP I...

Страница 92: ...If TCP IP is not installed click on the Add button to start the installation 4 Select Protocol and click on the Add button Figure A11 2 Select Network Component Type 5 Select Microsoft and TCP IP in M...

Страница 93: ...t of Network Components 7 Click on the Properties button and configure the settings in each of the TCP IP Properties window Figure AII 4 Select TCP IP protocol Figure AII 5 IP Address Configuration NO...

Страница 94: ...l a network card As such only the configuration for TCP IP is shown 1 From the Start menu click Control Panel then click Network and Internet Connections Then click Network Connections and your comput...

Страница 95: ...k on the Properties button Figure AII 8 IP Address Configuration 4 Configure your IP address and the rest of the parameters so that you can connect to the network NOTE Please check with your system ad...

Страница 96: ...dress 192 168 168 1 is the default IP address If your network is using other IP address other than default IP address please change the IP address in the above command You will see a prompt asking you...

Страница 97: ...Configuration and Commands on Telnet Interface 87 AIII 2 Command Line Interface Commands List Command Examples ping d d d d show ip show ip stat show ip routing table show arp table show icmp stat sh...

Страница 98: ...x WP11A Compex WP11A will automatically switch to loader mode if the main code is corrupted Code can be corrupted due to power surges or it could be uploading newer firmware results in router failing...

Страница 99: ...onds 505887 bytes s When the firmware image file is uploaded it will copy it to the flashrom During uploading the firmware image file to Compex WP11A the DIAG LED will light up NOTE The firmware image...

Страница 100: ...at there are many different brands of broadband modems Depending on the model approved by your ISP some modems use a MDI straight through while others use MDIX cross connect cable Use the right cable...

Страница 101: ...om your PC to open a DOS environment and run PING 165 21 100 88 or for example PING www cnn com If you can receive replies from the PING command it indicates the router has successfully connected to t...

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