If you have problems, read the Firmware Upgrade Tips!

Linksys Router Firmware Archive
[These downloads are not the current versions!  Go to this page for current versions!]

This is BETA firmware.  This means:

• Install at your own risk!
• Linksys will not answer questions or provide support with any problems you might have.
• You can send bug reports to support@linksys.com.

If you have problems, read the Firmware Upgrade Tips!

This firmware may be used with the following products:

• 1 port BEFSR11
• 4 port BEFSR41
• USB port BEFSRU31

1.38.5 has the following improvements over 1.38.4:

1. add "multicast pass through" option in Filter UI page
2. change max MTU setting value of PPPoE from 1446 to 1492
3. improve throughput under PPPoE

Download 1.38.5 BETA

This firmware (V1.37) is approved for distribution by Linksys.

This is RELEASED firmware.  This means:

• Linksys will answer questions and provide support with any problems you might have.
  
  

• Use the contact information on this page.

If you have problems, read the Firmware Upgrade Tips!

This firmware may be used with the following products:

• 1 port BEFSR11
• 4 port BEFSR41
• USB port BEFSRU31

Linksys released a revised version of 1.37, dated Fri Jan 5, 2001, and did not change the firmware revision number.  We recommend you download and install this new version if you already installed the older 1.37 version.  Changes from the earlier 1.37 version are shown in bold below.

This version has the following improvements over 1.36:

1. Modified the access log message to import to Excel
2. Add the RAS function
NOTE: This is not a Remote Access Server function.  It is connection management system similar to PPPoE.
3. Move Log page to first banner.
4. Add a “MAC Address Clone” page
5. Fixed NEWS server connection problem
6. Add a Note message in “Setup” page for PPPoE and RAS
7. Modified the HTTP module
8. Modified LCP_request time to avoid the timeout issue. Timeout increased to 15 seconds.
9. RAS Plan: When choose 256k, it will show 256k even refresh.
10. RAS help is in the setup help.
11. More detail is in the RAS help.
12. Fixed Forwarding protocol problem.
13. Fixed lost connection of SSH problem.
14. Support multicast traffic - FTP downloads
15. Fixed system lock up when filter is setted
16. Fixed press "Continue" can't go back to pre-setting page problem 
17. Keep the DHCP Table when system reboots.
18. Change the size of incoming log table from 200 to 70.
19. Fixed Broadcast ping problem (response src IP is wrong)
20. Fixed Broadcast trap IP problem.
21. Fixed WIN CE DHCP problem (UDP checksum error)
22. Adjusted TFTP upgrade password length. 
23. Add protocol selection in Forwarding page 
24. Add protocol selection in Filter page 
25. Add MAC Filter in Filter page(50 entries)
26. Resolved RAS Problem when DMZ is enabled.
27. Resolved Remote Management problem
28. Resolved Failed UI Link problem.

Some of the missing Help pages have also been restored.

This is BETA firmware.  This means:

• Install at your own risk!
• Linksys will not answer questions or provide support with any problems you might have.
• You can send bug reports to support@linksys.com.

If you have problems, read the Firmware Upgrade Tips!

This firmware may be used with the following products:

• 1 port BEFSR11
• 4 port BEFSR41
• USB port BEFSRU31

1.38.4 has the following improvements over 1.38.2:

1.fixed an UDP problem in NAT module.
2.Novell and Cisco VPN router.

NOTE
1.38.4c contains special fixes for 3Com modems and PPPoA.
It will NOT WORK in a PPPoE environment!

Download it ONLY if you are using a 3COM DSL modem AND are using PPPoA. 

IF IN DOUBT, DON'T LOAD IT, LOAD 1.38.4!

Download 1.38.4

Download 1.38.4c

4/2/01 Release/BETA History- V1.36 to 1.38.2

Download 1.38.2

9/23/00 V1.35 RELEASE Information:

NOTE: Multiple users have complained of problems with this release.  
Reported problems include:

• Resolving domain names (can see DNS servers, but name resolution fails.)

• Router lock-ups (fixed by power-cycling the router)

• Connection drops

• Intermittent inability to connect to the built-in admin pages

Try going back to the 1.33.1 BETA version, which can be downloaded from the Linksys FTP site (file is named befsr_v1331.exe), or the 1.30 previous released version, also downloadable from the FTP site (file is named befsr_v130.exe).

This firmware (V1.35) is approved for distribution by Linksys.

This is RELEASED firmware.  This means:

• Linksys will answer questions and provide support with any problems you might have.
  
  

• Use the contact information on this page.

If you have problems, read the Firmware Upgrade Tips!

This firmware may be used on both the 1 Port BEFSR11 and 4 port BEFSR41 routers.  

This version has the following improvements over 1.34:

1) Keep Alive feature added to PPPoE [Setup Tab].

2) Manual DHCP Release / Renew buttons added [Status Tab].

3) Remote Upgrade enable added [Filters Tab].

4) Incoming / Outgoing Logging features added, including the ability to send the log to a specific machine. (The LogViewer application works with Windows machines only).[Log Tab].

The optional LogViewer.exe application is not included in the 1.35 zip file, even though it's mentioned in the help section of the log page. However, the LogViewer is in the 1.33.1 self extracting zip file, which can be downloaded from the Linksys FTP site (file is named befsr_v1331.exe), and also included in the 1.35 Helper below.

Download this 1.35 Helper (267KB .zip format) for some additional documentation for this release.  Documents are in text, MS Word, and MS Excel formats. This file also contains the logviewer.exe and snmp.dll files for use with the Logging function on Windows machines.

This firmware (V1.34) is approved for distribution by Linksys.

This is RELEASED firmware.  This means:

• Linksys will answer questions and provide support with any problems you might have.
  
  

• Use the contact information on this page.

If you have problems, read the Firmware Upgrade Tips!

This firmware may be used on both the 1 Port BEFSR11 and 4 port BEFSR41 routers.  

This version has the following improvement over 1.33 BETA. 

1) Router Name changed to Host Name on the [Setup Tab]

This version removes most of the features that were present in BETA 1.33.1,
including PPPoE Keep Alive.

This firmware (V1.33.1) is approved for distribution by Linksys.

This is BETA firmware.  This means:

• Install at your own risk!
  
  
• Linksys will not answer questions or provide support with any problems you might have.
  
  
• You can send bug reports to support@linksys.com.

If you have problems, read the Firmware Upgrade Tips!

This firmware may be used on both the 1 Port BEFSR11 and 4 port BEFSR41 routers.  

This version has the following improvements over 1.33. 

1) Keep Alive feature added to PPPoE [Setup Tab].

2) Manual DHCP Release / Renew buttons added [Status Tab].

3) Remote Upgrade enable added [Filters Tab].

4) Incoming / Outgoing Logging features added, including the ability to send the log to a specific machine. (The LogViewer application works with Windows machines only).[Log Tab].

Download this file (225KB .zip) for some helpful documentation to use with this release.  Documents are in text, MS Word, and MS Excel formats.

This firmware (V1.33.1) is approved for distribution by Linksys.

This is BETA firmware.  This means:

• Install at your own risk!
  
  
• Linksys will not answer questions or provide support with any problems you might have.
  
  
• You can send bug reports to support@linksys.com.

If you have problems, read the Firmware Upgrade Tips!

This firmware may be used on both the 1 Port BEFSR11 and 4 port BEFSR41 routers.  

This version has the following improvements over 1.33. 

1) Keep Alive feature added to PPPoE [Setup Tab].

2) Manual DHCP Release / Renew buttons added [Status Tab].

3) Remote Upgrade enable added [Filters Tab].

4) Incoming / Outgoing Logging features added, including the ability to send the log to a specific machine. (The LogViewer application works with Windows machines only).[Log Tab].

Download this file (225KB .zip) for some helpful documentation to use with this release.  Documents are in text, MS Word, and MS Excel formats.

This firmware (V1.33) is approved for distribution by Linksys.

This is BETA firmware.  This means:

• Install at your own risk!
  
  
• Linksys will not answer questions or provide support with any problems you might have.
  
  
• You can send bug reports to support@linksys.com.

If you have problems, read the Firmware Upgrade Tips!

It may be used on both the 1 Port BEFSR11 and 4 port BEFSR41 routers.  

This version has the following improvements over 1.30. 
(It includes improvements that were included in V1.30.5 and fixes the WAN DHCP client problem in 1.32.):

1) Change the setting of filter and forwarding from single entry to range of ports.

2) Solve the ping problem from WAN to a LAN host. 

3) Add help contents about IPSec / PPTP pass-thru, remote mangement, and range setting

4) Modifications for the IPSec+PPPoE problem

5) URL Access log is created in the STATUS page

6) Leased time display is in the STATUS page

7) User-defined WAN MAC address setting can now be configured in the SETUP page

8) Add Remote management feature 

9) Add Remote management / IPSec pass-thru / PPTP pass-thru disable/enable feature in the FILTER page.

10) Fixed the internal loopback bug under PPPoE or DHCP environment.

This firmware (V1.30.5) is approved for distribution by Linksys.

This is BETA firmware.  This means:

• Install at your own risk!
  
  
• Linksys will not answer questions or provide support with any problems you might have.
  
  
• You can send bug reports to support@linksys.com.

If you have problems, read the Firmware Upgrade Tips!

It may be used on both the 1 Port BEFSR11 and 4 port BEFSR41 routers.

This version has the following improvements:

1. Add access log in the STATUS page

2. Add Leased time display in the STATUS page

3. Add user-defined WAN MAC address setting in the SETUP page

4. Add Remote management feature ( Currently, the TCP port is fixed as 80)

5. Add Remote management / IPSec pass-thru / PPTP pass-thru disable/enable in the FILTER page

6. Fixed the internal loopback bug under PPPoE or DHCP environment.

Note that the built-in help pages have not yet been updated.

The following changes were made in 1.30:

1. Support PPPoE username/password up to 63 characters ( orig. is 39 )

2. Support IPSec pass thru.

3. Fixed FTP data corruption problem.

4. Fixed the www.match.com web browsing problem.

5. Modified PPPoE to solve the disconnection problem. (Not final)

6. Accept any code name (not only code.bin ) except boot.bin, mac.bin.

• There have been reports that Loopback was broken by V1.23. This will affect you only if you are hosting a server that you want to access by domain name or WAN IP address.
  
  

• Slower routing speed
  
  

• Difficulty maintaining connections

Look for a filename beginning with "BEFS". 
Latest good version as of 10 May 2000 is titled befsr41v122.exe.  

Here are the V1.22 release notes

V1.22 
Add the description about PPPoE and "Block WAN request" in the help.

Solved the IP address 255 problem

Add the "Connect on Demand" feature for PPPoE

Support internal loopback feature for accessing the internal serversvia the WAN IP address.

Inhibit the ability to upgrade firmware from WAN port.

Build in a Java-based TFTP upgrade utility. User can find this on thehelp page.

Support multi-player to play HalfLife.

 

V1.21 Addressed DHCP Client not refreshing properly

V1.20b5 Beta Addressed issue on Status tab not refreshing properly

V1.20b3 Beta Addressed issues where some sites could not be connected

v1.20b2 Beta ADD more more authenication protocols

V1.20b1 Beta First release

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Upgrade instructions are in a ReadME doc that comes with the update, or go here for an on-line copy.