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Instant Broadband
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Series
EtherFast
®
Cable/DSL Routers
Chapter 1:Introduction
The Linksys EtherFast
®
Cable/DSL Router
Congratulations on the purchase of the EtherFast Cable/DSL Router from
Linksys! The EtherFast Cable/DSL Router is the perfect solution for connect-
ing a network of PCs to a high-speed broadband Internet connection and to an
Ethernet network backbone. Configurable as a DHCP server for your network,
the EtherFast Cable/DSL Router is the only visible network device on the
Internet. The Router also serves as your Internet NAT firewall, protecting your
network’s PCs from being accessed by external users. All incoming data pack-
ets are monitored and filtered. The Router can also be configured to block
internal users’ access to the Internet with IP filtering, as well as to play Internet
games, videoconference, and much more. Plus, the Router supports Universal
Plug and Play (UPnP), which allows Windows XP to automatically configure
the Router for various Internet applications, such as videoconferencing and
gaming—making the Router a snap to use.
Now all of your PCs can enjoy lightning-fast broadband Internet connections
and share internal network data. Link them all together and network faster than
you ever thought possible.
• Connects to a Cable/DSL Modem and to a 10/100 Network
• Supports Universal Plug and Play (UPnP)
• Equipped With a 3 or 4-Port 10/100 Switch (BEFSRU31 & BEFSR41 ver. 2
only)
• Connects Up to 253 PCs to the Internet with Just One WAN IP Address
• Configurable through Your Web Browser
• Supports Single-Session IPSec and PPTP Pass-Through for Virtual Private
Network (VPN)
• Administer and Upgrade Your Router Remotely Over the Internet
• 10/100 Switch Speeds Up Your Gaming and Multimedia Connections
(BEFSRU31 & BEFSR41 ver. 2 only)
• Configurable as a DHCP Server on Your Network
• Compatible with Virtually All Standard Internet Applications
• Administrators Can Set Up Port Filtering, Port Range Forwarding, MAC
Address Filtering, DMZ Hosting, and Much More
Appendix G: 4-Port Router Specifications 107
4-Port Environmental Specifications 107
Appendix H: 1-Port Router Specifications 108
1-Port Environmental Specifications 108
Appendix I: 3-Port Router Specifications 109
3-Port Environmental Specifications 109
Appendix J: Warranty Information 110
Appendix K: Contact Information 111
1
The Linksys EtherFast Cable/DSL Router
Features