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EtherFast® Cable/DSL Router with 4-Port Switch (BEFSR41)
• Built-in 4-port switch connects four local PCs directly
• Daisy-chain out to more hubs & switches as your network grows
• Supports DHCP, Universal Plug-and-Play (UPnP)
Need Help?
To get immediate help with your BEFSR41 and learn how we can improve your wireless experience. Fees may apply for support (available in the U.S. only).
Call Now (855) 464-5947 (Toll Free)
Support Sections
Guide Me provides step-by-step solutions and troubleshooting tips. FAQs are frequently asked product questions. Select Downloads for user guides and firmware updates.
- Overview
- Guide Me
- FAQs
- Product Information
- Keeping your Linksys devices’ firmware or driver updated
- Getting to know the BEFSR41 v4
- BEFSR41 FAQ
- How to find the model and serial number of your Linksys device
- Setting up your router
- Setting up a Linksys router with Cable Internet service
- Setting up a Linksys router for DSL Internet connection
- Setting up a router with a Static IP account
- Connecting devices to a Linksys router using an Ethernet cable
- Changing the LAN IP of a Linksys router to Work with a DSL Modem
- Resetting the router to factory defaults and changing the router’s password
- Different ways in setting up your Linksys wireless router
- Advanced Troubleshooting
- Blinking Power or Diag LED on a router
- Determining the correct MTU size to resolve intermittent wired connections
- Assigning a static IP address on a wired computer
- Upgrading the Linksys router’s firmware
- Accessing the router’s web-based setup page
- Encountering difficulties accessing the router's web-based setup page
- Resetting the Linksys router to factory default
- Cascading or Connecting a Linksys router to another router
- Setting up port range forwarding on Linksys wireless-N routers and gateways
- Resolving NAT type issues with gaming consoles through a Linksys router
- Configuring File and Printer Sharing on Windows 7, Vista and XP
- Product Information
- Keeping your Linksys devices’ firmware or driver updated
- Getting to know the BEFSR41 v4
- BEFSR41 FAQ
- Finding the model and the serial number of your Linksys device
- Setting up your router
- Setting up a Linksys router with Cable Internet service
- Setting up a Linksys router for DSL Internet connection
- Setting up a router with a Static IP account
- Connecting devices to a Linksys router using an Ethernet cable
- Changing the LAN IP of a Linksys router to Work with a DSL Modem
- Resetting the router to factory defaults and changing the router’s password
- Different ways in setting up your Linksys wireless router
- Advanced Troubleshooting
- Blinking Power or Diag LED on a router
- Determining the correct MTU size to resolve intermittent wired connections
- Assigning a static IP address on a wired computer
- Upgrading the Linksys router’s firmware
- Accessing the router’s web-based setup page using a Mac® computer
- Encountering difficulties accessing the router's web-based setup page
- Resetting the Linksys router to factory default
- Cascading or Connecting a Linksys router to another router
- Setting up port range forwarding on Linksys wireless-N routers and gateways
- Resolving NAT type issues with gaming consoles through a Linksys router
- Configuring File and Printer Sharing on Windows 7, Vista and XP
- Forums
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BEFSR41 V3 activating UPnP
I keep running into this problem too. Didn't know what caused it at first but it is VERY annoying. I didn't want to have...
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Unable to stop the power light from blinking on a BEFSR41, after...
Unable to stop the power light from blinking on a BEFSR41 tried updating the firmware.I have tried resetting the router...
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Help! Port Forwarding Not Working on BEFSR41 V.2
I am trying to forward Port 41634 for my bittorrent client, uTorrent. I've gone through the port forwarding setup (see attached...
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IIssue with Nat type 3 on PS3
*THIS ISSUE HAS BEEN SOLVED* I solved this issue after it seemed like I tryed everything but nothing worked....
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BEFSR41 Firewall Setup (Stateful Firewall)
1. Yes, it has a firewall built in. It protects the router. (Just like most other "firewalls" in other consumers...
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Re: BEFSR41 V2.1 and Windows 7/Vista compatibility
What is the IP Address you are getting on the Vista or Win7 computer when connected to the router...? Click Start >>...
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Wan not working........Uplink does. Why?
If you connect the modem to the uplink port of the router you basically bypass the router. It's almost the same as if you...
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Use BEFSR41 as a hub only
I currently have a BEFSR81 hooked up to my cable modem... everything worked great until I had to move my computers, but...
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Need BEFSR41 help
OK, this is pretty broad, but bear with me. I've got 2 computers running through a BEFSR41 v2 router. I've had very few...
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BEFSR41
I have a BEFSR41 and when I go to the configuration pages the program is very slow. I often have to click the link...
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BEFSR41 and DSL connection
What operating system are you using? Win XP SP2? Vista? other? Stop using the setup software. ...
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BEFSR41 Port Forwarding Problems
1. You should never assign a static IP address inside the DHCP IP address pool (default 192.168.1.100-149). Assign an address...
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BEFSR41 V3 Limited or No Connectivity
Looks to me like a Windows problem. You should try reinstalling the network driver (first uninstall the device and remove...
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BEFSR41 IPv6
1. Your computer is able to use IPv6 without your router supporting it. If you set up IPv6 on your computer you can set...
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DHCP Reservation on Current firmware version for BEFSR41
Newer models of Linksys routers like the E series do have DHCP reservation.
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Samsung BD player reports HTTP port is disabled. SOLVED
Found the fix! The problem was with using the automatic configuration. The router set up allows you to enter 3 DNS servers....
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Installing New BEFSR41 Routers
Your router should have a User Name that is blank, and a Password of "admin" (with no quotes). If this...
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BEFSR41: Changing the netmask
I am using a BEFSR41 for my network. My internal netmask is 255.255.0.0. The only options permitted in the dropdown list...
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WAP54G to BEFSR41: internet not getting to computers
If you want separation you have to hook up the BEF through its internet port to the rest of the network and you have to...
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BEFSR41 Slow Internet Connection
BEFSR41 v2 Router's WAN Port is 10BaseT RJ-45 Port, it cannot handle a connection of 20Mbps...You need to purchase a new...
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BEFSR41 Not Saving Settings
You can try couple of things -1. Try a different Browser.2. Try a different PC/Laptop.3. Try to upgrade your router's firmware,...
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BEFSR41 v.1 Initial Setup
Assuming that you have a good ethernet cable between your BEFSR41 and the upstream router ("cable modem" or ASDL...
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Cascading BEFSR41 Routers
You can casecade 5 BEFSR41's making the first router to be the main router. Click here on how to.?
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VPN with BEFSR41
You said : If I leave the linksys out of the loop and connect direct to the cable modem I get a link - and a family whining...
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Cant port forward please help
The problem is that you have two NATs (your gateway and your router), so your best option would be to disable the routing...
- Downloads
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E-Series
Step 1:
Look at the top of the device.Step 2:
The model number should be found under the CISCO logo.NOTE: The images may vary depending on the exact model number of your Linksys product. The serial number is located underneath the device. If there is no version number beside the model number, it means that it is a version 1.
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Blue and Black
Step 1:
Flip the device over.Step 2:
You should find the model number on the sticker underneath the device. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number of the device is WRT54G ver 6.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
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Silver
Step 1:
Look at the side panel of the router when it is standing vertically.Step 2:
You should find the model number on the sticker. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number is WRT54GX4.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
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Wireless Routers with Voice Ports
Step 1:
Look at the side panel of the router when it is standing vertically.Step 2:
You should find the model number on the sticker. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number is WRTP54G V.2.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
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Wireless VPN Routers
Step 1:
Look at the side panel of the router when it is standing vertically.Step 2:
You should find the model number on the sticker. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number is WRV54G.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
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Blue and Black
Step 1:
Flip the device over.Step 2:
You should find the model number on the sticker underneath the device. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number of the device is BEFSR41 ver.4.1.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
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PC Card or Card Bus
Step 1:
If your adapter is already connected to the computer, shut down your computer and remove the adapter.Step 2:
You should find the model number on the device itself. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number is WPC54G ver.7NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
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PCI Adapter
Step 1:
If your adapter is already connected to the computer, shut down your computer and remove the adapter.Step 2:
You should find the model number on the device itself. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number is WMP54G ver.4.1.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
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USB Wireless Adapter
Step 1:
Look for the sticker around the device.Step 2:
You should find the model number on the sticker. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number is WUSB54G ver.4.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
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PCI Adapters
Step 1:
If your adapter is already connected to the computer, shut down your computer and remove the adapter.Step 2:
You should find the model number on the device itself. Please take note of the exact model number and version. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
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SE Switches
Step 1:
Look at the top of the device.Step 2:
The model number should be found under the CISCO logo.Step 3:
Take note of the exact model number and version of your product. The serial number is located underneath the device. In this example, the model number of the device is SE1500.NOTE: The images may vary depending on the exact model number of your Linksys product. If there is no version number beside the model number, it means that it is a version 1.
-
Step 1:
Flip the device over.Step 2:
You should find the model number on the sticker underneath the device. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number.
-
Step 1:
Flip the device over.Step 2:
You should find the model number on the sticker underneath the device. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number of the device is NMH410.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
-
Step 1:
Flip the device over.Step 2:
You should find the model number on the sticker underneath the device. Please see the example.Step 3:
Take note of the exact model number and version of your Linksys device. The serial number is located right underneath the model number. In this example, the model number of the device is DMC250.NOTE: The images may vary depending on the exact model number of your Linksys Product. If there is no version number beside the model number it means that is version 1.
- Videos
- Live Chat
Guide Me
Get quick solutions and troubleshooting tips.
Hot Topics
Frequently asked questions
Frequently Asked Questions for various Operating Systems
Forums
Downloads
Please ensure you select the correct hardware version as not all downloads are compatible with your device.
Free Software notice for certain products, click here.
Firmware
10/19/2010
Ver.2.00.4 Build 8
Download
398 KB(Firmware)
Release Notes
Setup Wizard
Download
72.6 MB(Setup Wizard)
Firmware Upgrade Instructions
Download
(Firmware Upgrade Instructions)
Firmware
09/29/2008
Ver.2.00.4 Build 5
Download
395 KB(Firmware)
Release Notes
Firmware
09/13/2006
Ver.1.04.09
Download
363 KB(Firmware)
Release Notes
Setup Wizard
Download
1.59 MB(Setup Wizard)
Firmware
09/13/2006
Ver.1.04.09
Download
363 KB(Firmware)
Release Notes
Firmware Upgrade Instructions
Download
(Firmware Upgrade Instructions)
Utility
07/22/2005
Download
36.0 KB(Utility)
Setup Wizard
Download
1.59 MB(Setup Wizard)
Firmware
04/01/2004
Ver.1.05.00
Download
234 KB(Firmware)
Release Notes
Firmware Upgrade Instructions
Download
(Firmware Upgrade Instructions)
Guides and Information
Firmware
08/30/2004
Ver.1.46.2
Download
362 KB(Firmware)
Release Notes
Firmware Upgrade Instructions
Download
(Firmware Upgrade Instructions)
Setup Wizard
08/30/2004
Download
36.0 KB(Setup Wizard)
Guides and Information
Firmware
08/30/2004
Ver.1.46.2
Download
362 KB(Firmware)
Release Notes
Firmware Upgrade Instructions
Download
(Firmware Upgrade Instructions)
Setup Wizard
08/30/2004
Download
36.0 KB(Setup Wizard)
How to find your model or serial number
To find model or serial numbers, choose your device below.
WIRELESS ROUTERS AND ACCESS POINTS
WIRED ROUTERS
WIRELESS ADAPTERS
WIRED ADAPTERS
SWITCHES
BRIDGES
MEDIA HUB
WIRELESS HOME AUDIO
Forums
-
BEFSR41 V3 activating UPnP
I keep running into this problem too. Didn't know what caused it at first but it is VERY annoying. I...
-
Unable to stop the power light from blinking on a BEFSR41, after...
Unable to stop the power light from blinking on a BEFSR41 tried updating the firmware.I have tried resetting...
-
Help! Port Forwarding Not Working on BEFSR41 V.2
I am trying to forward Port 41634 for my bittorrent client, uTorrent. I've gone through the port forwarding...
Guide Me
Get quick solutions and troubleshooting tips.




