Linksys BEFSX41 manual Figure E-1

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Instant Broadband® Series

Step One: Pinging an IP Address

The first step to determining your ISP’s web and e-mail server address is to ping its IP address.

1.Power on the computer and the cable or DSL modem, and restore the network configuration set by your ISP if you have since changed it.

2.Click Start, then Run, and type command. This will bring up the DOS window.

3.At the DOS command prompt, type ping mail (assuming that the loca- tion for which you’re trying to find an IP address is configured as mail). Press Enter. Information such as the following data, taken from a ping of Microsoft Network’s e-mail server, will be displayed.

C:\>ping mail

Pinging mail [24.53.32.4] with 32 bytes of data:

Reply from 24.53.32.4: bytes=32 time<10ms TTL=128

Reply from 24.53.32.4: bytes=32 time<10ms TTL=128

Reply from 24.53.32.4: bytes=32 time<10ms TTL=128

Reply from 24.53.32.4: bytes=32 time<10ms TTL=128

Ping statistics for 24.53.32.4:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms

Figure E-1

4.Write down the IP address returned by the ping command. (In the example above: 24.53.32.4.) This IP address is the actual IP address of the server mail, or any other word or value you have pinged.

EtherFast® Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint

Step Two: Pinging for a Web Address

While the IP address returned above would work as your e-mail server address, it may not be permanent. IP addresses change all the time. Web addresses, how- ever, usually don’t. Because of this, you’re likely to have fewer problems by configuring your system with web addresses rather than IP addresses. Follow the instructions below to find the web address assigned to the IP address you just pinged.

1.At the DOS command prompt, type ping -a 24.53.32.4, where 24.53.32.4 is the IP address you just pinged. Information such as the following data will be displayed.

C:\>ping -a 24.53.32.4

Pinging mail.msnv3.occa.home.com [24.53.32.4] with

32 bytes of data:

Reply from 24.53.32.4: bytes=32 time<10ms TTL=127

Reply from 24.53.32.4: bytes=32 time<10ms TTL=127

Reply from 24.53.32.4: bytes=32 time<10ms TTL=127

Reply from 24.53.32.4: bytes=32 time<10ms TTL=127

Ping statistics for 24.53.32.4:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms

Figure E-2

2.Write down the web address returned by the ping command (In the example in Figure C-2:mail.msnv3.occa.home.com is the web address). This web address is the web address assigned to the IP address you just pinged. While the IP address of mail could conceivably change, it is likely that this web address will not.

3.Replace your ISP’s abbreviated server address with this extended web address in the corresponding Internet application (web browser, e-mail application, etc.).

Once you have replaced the brief server address with the true server address, the Router should have no problem accessing the Internet through that Internet application.

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Contents User Guide Copyright & Trademarks Table of Contents Features IntroductionEnvironmental 139 IP Addresses An Introduction to LANs and WANsNetwork Setup Overview Why Do I Need a VPN?Your Virtual Private Network VPN Firewall Router to Firewall Router What is a Virtual Private Network?Ports PowerRouter’s Back Panel Modem connection will not work from any other portWAN and LAN LEDs Router’s Front Panel LEDsProceed to Connect the Router Overview Connecting Your Hardware Together and Booting UpRouter’s hardware installation is now complete Connect the RouterConfiguring Windows 95, 98, and Millennium PCs Configure the PCsConfiguring Windows 2000 PCs Go to Configure the RouterConfiguring Windows XP PCs Configure the Router Enter the Gateway Address Obtain an IP Address AutomaticallyStatic IP Address Advanced Proxies. Click Direct Connection to the InternetRAS PPPoECable/DSL Firewall Router’s Web-based Utility Quick and Easy Router AdministrationSetup Static IP User Name and PasswordWAN IP Firewall IPSec Pass Through Remote UpgradeBlock WAN Request Multicast Pass ThroughVPN Establishing a TunnelLocal Secure Group and Remote Secure Group Remote Security Gateway Authentication EncryptionKey Management Instant Broadband Series Phase Advanced Settings for Selected IPSec TunnelPassword Other SettingsStatus Dhcp Log Help Filters AdvancedInstant Broadband Series Forwarding UPnP Forwarding Port Triggering Static Routing Dynamic RoutingDMZ Host DMZ PortDMZ Host Address MAC Address Clone Current DMZ HostDdns DynDNS.orgAppendix a Troubleshooting Common Problems and SolutionsTZO.com For Windows NT For Windows XPFor Windows 95, 98, and Me For Windows XP Am not able to access the Router’s web interface Setup Can’t get the Internet game, server, or application to work To start over, I need to set the Router to factory default Need to use port triggering Click the Advanced = Filter tabFrequently Asked Questions TCP/IP is compatible with the Router Appendix B Maximizing VPN Security Step One Create an IPSec Policy IntroductionEnvironment Windows 2000 or Windows XPFilter List 1 win-router Step Two Build Filter ListsIP Address Figure C-6 Filter List 2 router=winTunnel 1 win-router Step Three Configure Individual Tunnel RulesAccept Respond Using IPSec XYZ12345. ClickString to Protect Negotiate Security Key exchange pre Shared key, as shownTunnel 2 router-win XYZ12345 Action Require Security This string to protectKey Exchange Preshared key,Step Four Assign New IPSec Policy Figure C-24Figure C-28 Step Five Create a Tunnel Through the Web-based UtilityAppendix D Snmp Functions Appendix E How to Ping Your ISP’s E-mail & Web AddressesFigure E-1 TCP/IP installation is now complete Appendix F Installing the TCP/IP ProtocolFor Windows NT, 2000, and XP Figure G-1Figure G-5 Appendix H Glossary 129 131 133 135 137 Environmental Appendix I SpecificationsWeb FTP Site Appendix J Warranty InformationAppendix K Contact Information Sales InformationCopyright 2003 Linksys, All Rights Reserved