I88P320W802.11g Wireless Firewall Router

P-320W 802.11g Wireless Firewall Router User’s Guide Version 1.00 11/2005 Edition 1 P-320W User’s Guide Copyright3 Copyright Copyright © 2005 by ZyXEL Communications Corporation. The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval system, translated into any language, or transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written permission of ZyXEL Communications Corporation. Published by ZyXEL Communications Corporation. All rights reserved. Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein. Neither does it convey any license under its patent rights nor the patent rights of others. ZyXEL further reserves the right to make changes in any products described herein without notice. This publication is subject to change without notice. Trademarks ZyNOS (ZyXEL Network Operating System) is a registered trademark of ZyXEL Communications, Inc. Other trademarks mentioned in this publication are used for identification purposes only and may be properties of their respective owners. P-320W User’s Guide 4 Federal Communications Commission (FCC) Interference Statement Federal Communications Commission (FCC) Interference Statement This device complies with Part 15 of FCC rules. Operation is subject to the following two conditions: • This device may not cause harmful interference. • This device must accept any interference received, including interference that may cause undesired operations. This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. If this equipment does cause harmful interference to radio/television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and the receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Caution 1To comply with FCC RF exposure compliance requirements, a separation distance of at least 20 cm must be maintained between the antenna of this device and all persons. 2This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Notice 1 Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada. P-320W User’s Guide Federal Communications Commission (FCC) Interference Statement5 Certifications 1Go to www.zyxel.com 2Select your product from the drop-down list box on the ZyXEL home page to go to that product's page. 3Select the certification you wish to view from this page. P-320W User’s Guide 6 Safety Warnings Safety Warnings For your safety, be sure to read and follow all warning notices and instructions. • To reduce the risk of fire, use only No. 26 AWG (American Wire Gauge) or larger telecommunication line cord. • Do NOT open the device or unit. Opening or removing covers can expose you to dangerous high voltage points or other risks. ONLY qualified service personnel can service the device. Please contact your vendor for further information. • Use ONLY the dedicated power supply for your device. Connect the power cord or power adaptor to the right supply voltage (110V AC in North America or 230V AC in Europe). • Do NOT use the device if the power supply is damaged as it might cause electrocution. • If the power supply is damaged, remove it from the power outlet. • Do NOT attempt to repair the power supply. Contact your local vendor to order a new power supply. • Place connecting cables carefully so that no one will step on them or stumble over them. Do NOT allow anything to rest on the power cord and do NOT locate the product where anyone can walk on the power cord. • If you wall mount your device, make sure that no electrical, gas or water pipes will be damaged. • Do NOT install nor use your device during a thunderstorm. There may be a remote risk of electric shock from lightning. • Do NOT expose your device to dampness, dust or corrosive liquids. • Do NOT use this product near water, for example, in a wet basement or near a swimming pool. • Make sure to connect the cables to the correct ports. • Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your device. • Do NOT store things on the device. • Connect ONLY suitable accessories to the device. P-320W User’s Guide ZyXEL Limited Warranty7 ZyXEL Limited Warranty ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in materials or workmanship for a period of up to two years from the date of purchase. During the warranty period, and upon proof of purchase, should the product have indications of failure due to faulty workmanship and/or materials, ZyXEL will, at its discretion, repair or replace the defective products or components without charge for either parts or labor, and to whatever extent it shall deem necessary to restore the product or components to proper operating condition. Any replacement will consist of a new or re-manufactured functionally equivalent product of equal value, and will be solely at the discret…

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P-320W User’s Guide Chapter 3 Connection Wizard51 The following table describes the labels in this screen. Table 11 Extend(WPA-PSK) Security LABELDESCRIPTION Pre-Shared Key Type from 8 to 63 case-sensitive ASCII characters. You can set up the most secure wireless connection by configuring WPA in the wireless LAN screens. You need to configure an authentication server to do this. BackClick Back to display the previous screen. NextClick Next to proceed to the next screen. ExitClick Exit to close the wizard screen without saving. 3.3.3 OTIST The following screen allows you to enable Prestige One-Touch Intelligent Security Technology (OTIST). One-Touch Intelligent Security Technology (OTIST) allows your Prestige to assign wireless clients the Prestige’s SSID and static WEP or WPA-PSK encryption settings. The wireless client must also support OTIST and have OTIST enabled. See Section 4.5 on page 72 for more information. Figure 18 OTIST P-320W User’s Guide 52 Chapter 3 Connection Wizard The following table describes the labels in this screen. Table 12 OTIST LABELDESCRIPTION Do you want to enable OTIST? Select the Yes radio button and click Next to proceed with the setup wizard and enable OTIST only when you click Finish in the final wizard screen. Click No and then Next to proceed to the following screen. Setup KeyThe default OTIST Setup Key is “01234567”. This key can be changed in the web configurator. Be sure to use the same OTIST Setup Key on the Prestige and wireless clients. BackClick Back to display the previous screen. NextClick Next to proceed to the next screen. ExitClick Exit to close the wizard screen without saving. Refer to the chapter on wireless LAN for more information. 3.4 Connection Wizard: STEP 3: Internet Configuration The Prestige offers three Internet connection types. They are Ethernet, PPP over Ethernet or PPTP. The wizard attempts to detect which WAN connection type you are using. If the wizard does not detect a connection type, you must select one from the drop-down list box. Check with your ISP to make sure you use the correct type. Figure 19 Connection Wizard: STEP 3: WAN Connection Type. P-320W User’s Guide Chapter 3 Connection Wizard53 The following table describes the labels in this screen, Table 13 Connection Wizard: STEP 3: WAN Connection Type CONNECTION TYPEDESCRIPTION EthernetSelect the Ethernet option when the WAN port is used as a regular Ethernet. PPPoESelect the PPP over Ethernet option for a dial-up connection. If your ISP gave you a an IP address and/or subnet mask, then select PPTP. PPTPSelect the PPTP option for a dial-up connection. 3.4.1 Ethernet Connection Type Choose Ethernet when the WAN port is used as a regular Ethernet. Figure 20 Ethernet Connection Type 3.4.2 PPPoE Connection Type Point-to-Point Protocol over Ethernet (PPPoE) functions as a dial-up connection. PPPoE is an IETF (Internet Engineering Task Force) standard specifying how a host personal computer interacts with a broadband modem (for example DSL, cable, wireless, etc.) to achieve access to high-speed data networks. For the service provider, PPPoE offers an access and authentication method that works with existing access control systems (for instance, RADIUS). P-320W User’s Guide 54 Chapter 3 Connection Wizard One of the benefits of PPPoE is the ability to let end users access one of multiple network services, a function known as dynamic service selection. This enables the service provider to easily create and offer new IP services for specific users. Operationally, PPPoE saves significant effort for both the subscriber and the ISP/carrier, as it requires no specific configuration of the broadband modem at the subscriber’s site. By implementing PPPoE directly on the Prestige (rather than individual computers), the computers on the LAN do not need PPPoE software installed, since the Prestige does that part of the task. Furthermore, with NAT, all of the LAN's computers will have Internet access. Refer to the appendix for more information on PPPoE. Figure 21 PPPoE Connection Type The following table describes the labels in this screen. Table 14 PPPoE Connection Type LABELDESCRIPTION ISP Parameter for Internet Access Service Name Type the name of your service provider. User NameType the user name given to you by your ISP. Password Type the password associated with the user name above. NextClick Next to continue. BackClick Back to return to the previous screen. ExitClick Exit to close the wizard screen without saving. P-320W User’s Guide Chapter 3 Connection Wizard55 3.4.3 PPTP Connection Type Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables transfers of data from a remote client to a private server, creating a Virtual Private Network (VPN) using TCP/ IP-based networks. PPTP supports on-demand, multi-protocol, and virtual private networking over public networks, such as the Internet. Refer to the appendix for more information on PPTP. Note: The Prestige supports one PPTP server connection at any given time. Figure 22 PPTP Connection Type The following table describes the fields in this screen Table 15 PPTP Connection Type LABELDESCRIPTION ISP Parameters for Internet Access User NameType the user name given to you by your ISP. PasswordType the password associated with the User Name above. PPTP Configuration Get automatically from ISP Select this radio button if your ISP did not assign you a fixed IP address. Use fixed IP address Select this radio button, provided by your ISP to give the Prestige a fixed, unique IP address. My IP AddressType the (static) IP address assigned to you by your ISP. P-320W User’s Guide 56 Chapter 3 Connection Wizard 3.4.4 Your IP Address The following wizard screen allows you to assign a fixed IP address or give the Prestige an automatically assigned IP address depending on your ISP. Figure 23 Your IP Address My IP Subnet Mask Type the subnet mask assigned to you by your ISP (if given). Server IP Address Type the IP address of the PP…

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P-320W User’s Guide Chapter 8 Network Address Translation (NAT)101 Figure 54 How NAT Works 8.1.4 NAT Application The following figure illustrates a possible NAT application, where three inside LANs (logical LANs using IP Alias) behind the Prestige can communicate with three distinct WAN networks. More examples follow at the end of this chapter. Figure 55 NAT Application With IP Alias 8.1.5 Default Server IP Address In addition to the servers for specified services, NAT supports a default server IP address. A default server receives packets from ports that are not specified in this screen P-320W User’s Guide 102 Chapter 8 Network Address Translation (NAT) Note: If you do not assign a Default Server IP Address, the Prestige discards all packets received for ports that are not specified in this screen or remote management. 8.1.6 Port Forwarding: Services and Port Numbers A SUA server set is a list of inside (behind NAT on the LAN) servers, for example, web or FTP, that you can make accessible to the outside world even though NAT makes your whole inside network appear as a single machine to the outside world. Use the Port Forwarding page to forward incoming service requests to the server(s) on your local network. You may enter a single port number or a range of port numbers to be forwarded, and the local IP address of the desired server. The port number identifies a service; for example, web service is on port 80 and FTP on port 21. In some cases, such as for unknown services or where one server can support more than one service (for example both FTP and web service), it might be better to specify a range of port numbers. In addition to the servers for specified services, NAT supports a default server. A service request that does not have a server explicitly designated for it is forwarded to the default server. If the default is not defined, the service request is simply discarded. Note: Many residential broadband ISP accounts do not allow you to run any server processes (such as a Web or FTP server) from your location. Your ISP may periodically check for servers and may suspend your account if it discovers any active services at your location. If you are unsure, refer to your ISP. The most often used port numbers are shown in the following table. Please refer to RFC 1700 for further information about port numbers. Please also refer to the Supporting CD for more examples and details on SUA/NAT. Table 41 Services and Port Numbers SERVICEPORT NUMBER ECHO7 FTP (File Transfer Protocol)21 SMTP (Simple Mail Transfer Protocol)25 DNS (Domain Name System)53 Finger79 HTTP (Hyper Text Transfer protocol or WWW, Web)80 POP3 (Post Office Protocol)110 NNTP (Network News Transport Protocol)119 SNMP (Simple Network Management Protocol)161 SNMP trap162 PPTP (Point-to-Point Tunneling Protocol)1723 P-320W User’s Guide Chapter 8 Network Address Translation (NAT)103 8.1.7 Configuring Servers Behind SUA (Example) Let's say you want to assign ports 21-25 to one FTP, Telnet and SMTP server (A in the example), port 80 to another (B in the example) and assign a default server IP address of 192.168.1.35 to a third (C in the example). You assign the LAN IP addresses and the ISP assigns the WAN IP address. The NAT network appears as a single host on the Internet Figure 56 Multiple Servers Behind NAT Example 8.2 General NAT Screen Click the NAT link under Network to open the General screen. Figure 57 NAT: General The following table describes the labels in this screen. Table 42 NAT: General LABELDESCRIPTION Enable Network Address Translation Network Address Translation (NAT) allows the translation of an Internet protocol address used within one network (for example a private IP address used in a local network) to a different IP address known within another network (for example a public IP address used on the Internet). Select the check box to enable NAT. ApplyClick Apply to save your changes back to the Prestige. ResetClick Reset to begin configuring this screen afresh. P-320W User’s Guide 104 Chapter 8 Network Address Translation (NAT) 8.3 Port Forwarding Screen Ordering your rules is important because the Prestige applies the rules in the order that you specify. When a rule matches the current packet, the Prestige takes the corresponding action and the remaining rules are ignored. If there are any empty rules before your new configured rule, your configured rule will be pushed up by that number of empty rules. For example, if you have already configured rules 1 to 6 in your current set and now you configure rule number 9. In the set summary screen, the new rule will be rule 7, not 9. Now if you delete rule 4, rules 5 to 7 will be pushed up by 1 rule, so old rules 5, 6 and 7 become new rules 4, 5 and 6. Refer to Table 41 on page 102 for port numbers commonly used for particular services. Note: If you do not assign a Default Server IP Address, the Prestige discards all packets received for ports that are not specified in this screen or remote management. To change your Prestige’s port forwarding settings, click the NAT link under Network and the Port Forwarding tab. The screen appears as shown. Figure 58 Port Forwarding P-320W User’s Guide Chapter 8 Network Address Translation (NAT)105 The following table describes the labels in this screen. Table 43 NAT: Port Forwarding LABELDESCRIPTION Default ServerIn addition to the servers for specified services, NAT supports a default server. A default server receives packets from ports that are not specified in this screen. If you do not assign a Default Server IP Address, the Prestige discards all packets received for ports that are not specified in this screen or remote management. #Number of an individual SUA server entry. ActiveThis icon is turned on when the port forwarding entry is enabled. Click the edit icon under Modify and select the Active checkbox in the Rule Setup screen to enable the port forwarding entry. Clear the checkbox to disable forwarding of these ports to an …

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P-320W User’s Guide Chapter 14 Logs141 CHAPTER 14 Logs This chapter contains information about configuring general log settings and viewing the Prestige’s logs. Refer to the appendices for example log message explanations. 14.1 View Log The web configurator allows you to look at all of the Prestige’s logs in one location. Click the Logs link under Maintenance to open the View Log screen. Log entries in red indicate system error logs. The log wraps around and deletes the old entries after it fills. Click a column heading to sort the entries. A triangle indicates ascending or descending sort order. Figure 89 View Log P-320W User’s Guide 142 Chapter 14 Logs The following table describes the labels in this screen. Table 59 View Log LABELDESCRIPTION WAN TypeThis shows the encapsulation method (and service type) the Prestige is using and the firmware version. Display TimeThis displays the time this screen was refreshed. Email Log Now Click Email Log Now to send the log screen to the e-mail address specified in the Log Settings page (make sure that you have first filled in the E-mail Log Settings fields in Log Settings). RefreshClick Refresh to renew the log screen. Clear Logs Click Clear Logs to delete all the logs. Time This field displays the time the log was recorded. See the chapter on time setting to configure the Prestige’s time and date. MessageThis field states the reason for the log. 14.2 Log Settings You can configure the Prestige’s general log settings in one location. Click the Logs link under Maintenance in the navigation panel and the Log Settings tab to open the Log Settings screen. Use the Log Settings screen to configure to where the Prestige is to send logs; the schedule for when the Prestige is to send the logs and which logs and/or immediate alerts the Prestige to send. An alert is a type of log that warrants more serious attention. They include system errors, attacks (access control) and attempted access to blocked web sites or web sites with restricted web features such as cookies, active X and so on. Some categories such as System Errors consist of both logs and alerts. You may differentiate them by their color in the View Log screen. Alerts display in red and logs display in black. Alerts are e-mailed as soon as they happen. Logs may be e-mailed as soon as the log is full. Selecting many alert and/or log categories (especially Access Control) may result in many e- mails being sent P-320W User’s Guide Chapter 14 Logs143 Figure 90 Log Settings The following table describes the labels in this screen. Table 60 Log Settings LABELDESCRIPTION E-mail Log Settings Mail Server Enter the server name or the IP address of the mail server for the e-mail addresses specified below. If this field is left blank, logs and alert messages will not be sent via E-mail. Mail SubjectType a title that you want to be in the subject line of the log e-mail message that the Prestige sends. Not all Prestige models have this field. Send Log To The Prestige sends logs to the e-mail address specified in this field. If this field is left blank, the Prestige does not send logs via e-mail. SMTP Authentication SMTP (Simple Mail Transfer Protocol) is the message-exchange standard for the Internet. SMTP enables you to move messages from one e-mail server to another. Select the check box to activate SMTP authentication. If mail server authentication is needed but this feature is disabled, you will not receive the e-mail logs. P-320W User’s Guide 144 Chapter 14 Logs User NameEnter the user name (up to 31 characters) (usually the user name of a mail account). PasswordEnter the password associated with the user name above. Syslog LoggingThe Prestige sends a log to an external syslog server. ActiveClick Active to enable syslog logging. Syslog Server IP Address Enter the server name or IP address of the syslog server that will log the selected categories of logs. Log Facility Select a location from the drop down list box. The log facility allows you to log the messages to different files in the syslog server. Refer to the syslog server manual for more information. Active Log and Alert LogSelect the categories of logs that you want to record. Send Immediate Alert Select log categories for which you want the Prestige to send E-mail alerts immediately. ApplyClick Apply to save your changes. Reset Click Reset to begin configuring this screen afresh. Table 60 Log Settings (continued) LABELDESCRIPTION P-320W User’s Guide Chapter 15 Tools145 CHAPTER 15 Tools This chapter shows you how to upload a new firmware, upload or save backup configuration files and restart the Prestige. 15.1 Firmware Upload Screen Find firmware at www.zyxel.com in a file that (usually) uses the system model name with a .bin extension, for example, "Prestige.bin". The upload process uses HTTP (Hypertext Transfer Protocol) and may take up to two minutes. After a successful upload, the system will reboot. Click the To o l s link under Maintenance in the navigation panel. Follow the instructions in this screen to upload firmware to your Prestige. Figure 91 Maintenance Firmware Upload The following table describes the labels in this screen. Table 61 Maintenance Firmware Upload LABELDESCRIPTION File Path Type in the location of the file you want to upload in this field or click Browse ... to find it. Browse... Click Browse... to find the .bin file you want to upload. Remember that you must decompress compressed (.zip) files before you can upload them. UpgradeClick Upgrade to begin the upload process. This process may take up to two minutes. P-320W User’s Guide 146 Chapter 15 Tools Note: Do not turn off the Prestige while firmware upload is in progress! After you see the Firmware Upload In Process screen, wait two minutes before logging into the Prestige again. Figure 92 Upload Warning The Prestige automatically restarts in this time causing a temporary network disconnect. In some operating systems, you may see the following icon on your desktop. Figure 9…

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P-320W User’s Guide Appendix C Setting up Your Computer’s IP Address181 Figure 119 Windows XP: Internet Protocol (TCP/IP) Properties 8Click OK to close the Internet Protocol (TCP/IP) Properties window. 9Click Close (OK in Windows 2000/NT) to close the Local Area Connection Properties window. 10 Close the Network Connections window (Network and Dial-up Connections in Windows 2000/NT). 11Turn on your Prestige and restart your computer (if prompted). Verifying Settings 1Click Start, All Programs, Accessories and then Command Prompt. 2In the Command Prompt window, type "ipconfig" and then press [ENTER]. You can also open Network Connections, right-click a network connection, click Status and then click the Support tab. Macintosh OS 8/9 1Click the Apple menu, Control Panel and double-click TCP/IP to open the TCP/IP Control Panel. P-320W User’s Guide 182 Appendix C Setting up Your Computer’s IP Address Figure 120 Macintosh OS 8/9: Apple Menu 2Select Ethernet built-in from the Connect via list. Figure 121 Macintosh OS 8/9: TCP/IP 3For dynamically assigned settings, select Using DHCP Server from the Configure: list. P-320W User’s Guide Appendix C Setting up Your Computer’s IP Address183 4For statically assigned settings, do the following: •From the Configure box, select Manually. •Type your IP address in the IP Address box. •Type your subnet mask in the Subnet mask box. •Type the IP address of your Prestige in the Router address box. 5Close the TCP/IP Control Panel. 6Click Save if prompted, to save changes to your configuration. 7Turn on your Prestige and restart your computer (if prompted). Verifying Settings Check your TCP/IP properties in the TCP/IP Control Panel window. Macintosh OS X 1Click the Apple menu, and click System Preferences to open the System Preferences window. Figure 122 Macintosh OS X: Apple Menu 2Click Network in the icon bar. •Select Automatic from the Location list. •Select Built-in Ethernet from the Show list. •Click the TCP/IP tab. 3For dynamically assigned settings, select Using DHCP from the Configure list. P-320W User’s Guide 184 Appendix C Setting up Your Computer’s IP Address Figure 123 Macintosh OS X: Network 4For statically assigned settings, do the following: •From the Configure box, select Manually. •Type your IP address in the IP Address box. •Type your subnet mask in the Subnet mask box. •Type the IP address of your Prestige in the Router address box. 5Click Apply Now and close the window. 6Turn on your Prestige and restart your computer (if prompted). Verifying Settings Check your TCP/IP properties in the Network window. Linux This section shows you how to configure your computer’s TCP/IP settings in Red Hat Linux 9.0. Procedure, screens and file location may vary depending on your Linux distribution and release version. P-320W User’s Guide Appendix C Setting up Your Computer’s IP Address185 Note: Make sure you are logged in as the root administrator. Using the K Desktop Environment (KDE) Follow the steps below to configure your computer IP address using the KDE. 1Click the Red Hat button (located on the bottom left corner), select System Setting and click Network. Figure 124 Red Hat 9.0: KDE: Network Configuration: Devices 2Double-click on the profile of the network card you wish to configure. The Ethernet Device General screen displays as shown. Figure 125 Red Hat 9.0: KDE: Ethernet Device: General P-320W User’s Guide 186 Appendix C Setting up Your Computer’s IP Address •If you have a dynamic IP address, click Automatically obtain IP address settings with and select dhcp from the drop down list. •If you have a static IP address, click Statically set IP Addresses and fill in the Address, Subnet mask, and Default Gateway Address fields. 3Click OK to save the changes and close the Ethernet Device General screen. 4If you know your DNS server IP address(es), click the DNS tab in the Network Configuration screen. Enter the DNS server information in the fields provided. Figure 126 Red Hat 9.0: KDE: Network Configuration: DNS 5Click the Devices tab. 6Click the Activate button to apply the changes. The following screen displays. Click Ye s to save the changes in all screens. Figure 127 Red Hat 9.0: KDE: Network Configuration: Activate 7After the network card restart process is complete, make sure the Status is Active in the Network Configuration screen. Using Configuration Files Follow the steps below to edit the network configuration files and set your computer IP address. P-320W User’s Guide Appendix C Setting up Your Computer’s IP Address187 1Assuming that you have only one network card on the computer, locate the ifconfig- eth0 configuration file (where eth0 is the name of the Ethernet card). Open the configuration file with any plain text editor. •If you have a dynamic IP address, enter dhcp in the BOOTPROTO= field. The following figure shows an example. Figure 128 Red Hat 9.0: Dynamic IP Address Setting in ifconfig-eth0 DEVICE=eth0 ONBOOT=yes BOOTPROTO=dhcp USERCTL=no PEERDNS=yes TYPE=Ethernet •If you have a static IP address, enter static in the BOOTPROTO= field. Type IPADDR= followed by the IP address (in dotted decimal notation) and type NETMASK= followed by the subnet mask. The following example shows an example where the static IP address is 192.168.1.10 and the subnet mask is 255.255.255.0. Figure 129 Red Hat 9.0: Static IP Address Setting in ifconfig-eth0 DEVICE=eth0 ONBOOT=yes BOOTPROTO=static IPADDR=192.168.1.10 NETMASK=255.255.255.0 USERCTL=no PEERDNS=yes TYPE=Ethernet 2If you know your DNS server IP address(es), enter the DNS server information in the resolv.conf file in the /etc directory. The following figure shows an example where two DNS server IP addresses are specified. Figure 130 Red Hat 9.0: DNS Settings in resolv.conf nameserver 172.23.5.1 nameserver 172.23.5.2 3After you edit and save the configuration files, you must restart the network card. Enter ./network restart in the /etc/rc.d/init.d directory. The following figure shows an example. …

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