Here is the latest firmware I was able to obtain for my NAS adapter, 1.48a. If you currently have a branded firmware (including the 1.42b from the post below), you will not be able to use this firmware due to the OEM name/webtag check.

There is a way to circumvent this checkwebtag issue. The WANSER-R uses two verifications when a firmware file is uploaded - it checks the firmware header for the proper OEM name and the file checksum before updating.

Warning: Do this at your own risk. All instructions provided as is. This may damage ("brick") your NAS and/or result in data loss. Read full disclaimer here.

If you currently have a 1.39 or earlier firmware you do NOT need these steps - just upload the firmware file for the 1.48 should work. These steps assume that you have the 1.42 MRT version of the firmware installed (from previous blog post).

Firmware Version G5S5020300148A0 L:1.17 . If you go to http://NAS/__config.htm, you should see VENDOR="MRT"; CHECKWEBTAG="1" [...]

To circumvent the webtag check and to upload the 1.48a, follow these steps:

1. Download this 1.38 firmware file. It has been altered to contain the MRT webtag. I did this with a hex editor by just comparing with the 1.42 MRT firmware file.

2. Unpack and upload the R3282_1_38a_MRT_header.bin to your WANSER-R

3. The WANSER-R should "think" a few seconds after the upload before giving you the incorrect file error. This is because the file passes the initial header check, but not the checksum.

4. Now open man_firm.html on the WANSER-R to force the update
http://NAS/man_firm.htm

5. The unit should reboot and once completed will be running the 1.38 firmware again. If the unit does not reboot after the update wait 5 mins then reset it to default settings: Unplug, push and hold reset button, plug back in and wait for 30 seconds, while still pushing the reset button, then power cycle again.

6. Now just update your firmware to the 1.48a from this post, the 1.38 firmware will accept this file and it will change your vendor to BASIC and your webchecktag to 0: VENDOR="BASIC"; CHECKWEBTAG="0". Again, if the unit does not reboot after the update, wait 5 mins then reset it to default settings: Unplug, push and hold reset button, plug back in and wait for 30 seconds, while still pushing the reset button, then power cycle again.

Once you have the checkwebtag set to 0, you can upload any firmware - just keep in mind that any branded (MRT or Addonics) firmware version 1.41 or higher will set the checkwebtag to 1 again.

Good luck.