Revert Back from DD-WRT to Linksys Official Firmware for WRT54G v5.0 Router

Posted on March 29, 2008 
Filed Under Cisco, Internet, Life



I’ve been using 3rd party firmware, dd-wrt for my Cisco’s Linksys WRT54G v5.0 around a year. Somehow, it gave me a lot of disconnection and instability. The latest dd-wrt firmware that I used is dd-wrt.v23_sp2_standard.

I made a decision to revert to the original / official firmware version 1.02.5 from Linksys.

Below is the details.

Linksys, A division of Cisco Systems, Inc.

Product:          WRT54G
Classification:   Firmware Release History
Firmware Date:    Jan 09, 2008
Release Date:     Mar 03, 2008

Last Firmware Version: 1.02.5

** NOTE ** This firmware is only compatible with WRT54G v.5 and v.6. Please check the bottom of your router for the router's hardware version.

Firmware 1.02.5
- Resolves issue with LELA
- Resolves issue with WAP54G in repeater mode

Firmware 1.02.4
- Resolves interoperability issue with DMA2200 and DMA2100.
- Resolves issue with how multicast packets with checksum error are being handled.

Firmware 1.02.2
- Resolves issue of working with DHCP relay agent.
- Resolves interoperability issue with WAP54G (repeater mode).
- Resolves issue with UPnP.
- Updates daylight saving schedule.
- Updates web GUI help in Access Restrictions.

Firmware 1.02.0
- Improves compatibility with BitTorrent.
- Resolves issue with not being able to block HTTP or PING on computers that are specified in the list of PCs.
- Resolves issue with presenting bogus error message when user is trying to set ?upstream bandwidth? to AUTO and save the setting.

Firmware 1.01.1
- Resolves issue with IP address assignment via DHCP on some particular devices.

Firmware 1.01.0
- Update Broadcom ethernet driver.
- Resolves DHCP server issue.
- Resolves TFTP upgrade failure with code utility.
- Resolves PPPoE lock up issue
- Resolves TFTP upgrade failure.
- Resolves Multi-session issue

Firmware 1.00.9
- Resolves issue with MAC cloning
- Resolves issue with L2TP connection
- Resolves issue with using DNS server behind the router
- Resolves issue with loading configuration through HTTPS
- Resolves issue with PPPoE CHAP authentication
- Resolves issue with using Ping Plotter
- Resolves issue with SSH disconnects
- Resolves issue with DHCP WAN connection not acquiring the correct IP
- Resolves issue with UPnP
- Adds support for WRT54G v.6
- Resolves issue with Access Restriction
- Resolves issue with incorrect time display
- Resolves issue with using subnets other than
- Resolves security issue when using IRC
- Resolves issue with WAN address being pingable when port forwarding is enabled
- Resolves issue with using Kultalinkki banking software
- Resolves issue where web GUI becomes unreachable if remote management is enabled on port 80 or 443
- Resolves issue with slow internal loopback, i.e., accessing a local server through the WAN IP address
- Resolves issue with accessing online game servers

Firmware 1.00.7
- Resoles MAC Address Clone issue.
- Resolves L2TP connections issues
- Resolves DNS server issues
- Resolves remote backup configuration feature
- Resolves Ping Plotter issue
- Resolves ISP DHCP addressing issue
- Resolves SSH issue of disassociation due to inactivity

Firmware 1.00.6
- Resolves issues with WAP54G repeater mode
- Resolves issues with certain PPPoE connection
- Resolves issues with SES turning back on when applying settings
- Resolves issues with WPA allowing Shared key selection
- Resolves issues with web GUI ping function
- Resolves issues with using MSN whiteboard
- Resolves issues with instability when using Bittorent
- Resolves issues with using certain ATA phone adapters
- Resolves issues with connecting to NNTP news servers

Firmware 1.00.4
- Resolves issues with slow downstream speeds
- Resolves issues with certain web sites not loading or loading slowly
- Resolves issues with obtaining an IP address from Windows 2000 Server
- Resolves issues with certain Internet video streaming
- Resolves issues with playing PSP games online

Firmware 1.00.2
- Resolves issue with SES and interoperability with other adapters
- Resolves issue with DynDNS abusive updates

Firmware 1.00.1
- Resolves issue with enabling remote management
- Resolves issue with unstable device boot up
- Resolves issue with International country codes

Firmware 1.00.0
- Initial Release
I’ll keep posting whether this firmware is stable enough to cater my highly-usage internet at home.


12 Responses to “Revert Back from DD-WRT to Linksys Official Firmware for WRT54G v5.0 Router”

  1. WAG200G - Linksys Wireless-G ADSL Home Gateway : - Re-engineering Life on April 8th, 2008 7:45 am

    [...] still thinking should I consider upgrading to WAG200G from my old WRT54G v5 which having a firmware problem [...]

  2. I’ve got myself a Blackberry 8320 from Maxis KLCC : - Re-engineering Life on June 9th, 2008 12:49 am

    [...] back home and play around with it. Need to connect to my Linksys dd-wrt router to the new BB [...]

  3. Lionel on June 9th, 2008 2:28 am

    Hi, i’m in the same situation as u do. Using dd-wrt v23 sp2 on wrt54g v5.0. A lot of disconnectivity and instability. Do you mind telling me how has the router been doing since you reverted it back to linksys firmware?

  4. Hisamudin on June 9th, 2008 2:31 am

    FYI, reverting back to original firmware is a savior. Since then, I never felt any downtime. Hail Linksys firmware!

  5. I bought a new Linksys WAG200G Wireless Modem Router for Streamyx at Digital Mall : - Re-engineering Life on September 2nd, 2008 6:11 pm

    [...] costs me RM200. My WRT54G v5.0 is old enough and needs replacement, after reverting several times using official Linksys and dd-wrt [...]

  6. John on September 18th, 2008 9:07 am

    Hey I have been trying to revert my firmware as well but it keeps failing when i try and load the linksys firmware

  7. Ronald Nissley on September 20th, 2008 3:36 am


    The WRT54G V5/5.1/6 do not support direct reversion from DD-WRT to Linksys firmware. Please see Apparently replacing stock firmware with DD-WRT firmware on WRT54GS V5/5.1/6 routers is a one-way street. There is an exception–you can essentially revert your WRT54GS with DD-WRT to a stock WRT54G.

    k thx bai,


  8. francis on October 8th, 2008 7:38 am

    can you tell me what the procedure is for restoring the linksys firmware? i have downloaded the latest linksys firmware, but it can’t be uploaded via the dd-wrt interface. i assume i’ll have to use tftp, but the vxworks bootloader was overwritten when i did the dd-wrt upgrade, so i don’t know what to do at this point. even though linksys firmware sucks, the dd-wrt firmware was a huge mistake.

  9. francis on October 8th, 2008 7:40 am

    ps – my router is a WRT54g v6

  10. Aaron on November 27th, 2008 1:51 am

    Man I’m glad I read these post before I flashed my router!! I think I’ll stick with the linksys firmware. Thank for the R/D info.

  11. gnudna on February 17th, 2009 12:00 am

    If people actually read the faq at the dd-wrt site they would realize that V5 V6 is not supported by the DD-WRT firmware, due to the fact that there is not enough memory on those devices.

  12. robert on March 1st, 2009 1:42 am

    The WRT54GS I have is directly supported and has enough memory. It is a v6 linksys running v24 SP1 and has had nothing but WAN connection issues – everything else works great and plenty of free memory to operate.

    I’ve done alot of reading on this issue and it seems to be quite widespread. I think I’m going to do some reading on how to revert back to generic linksys software because it’s hardly usable with the DD-WRT firmware on it.

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