Flashing DD-WRT onto Asus RT-N66U

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Bosfan
DD-WRT Novice


Joined: 19 Jul 2015
Posts: 2
PostPosted: Sun Jul 19, 2015 21:49    Post subject: please help,newbie with new router ASUS RT-N66U! Reply with quote
Hi guys
just got this router ASUS RT-N66U
H/W ver B1 and F/W 3.0.0.4.378 on 7/19.

a couple questions here as i want to flash it to use it with DD-WRT:
1-shall i do the set up-as explained in the booklet-
the wireless set up first or not?
2-if i understood Cesthree and Kozy,
i should NOT do the firware upgrade after the wireless set up
correct or not?
3-is the method explained by Cesthree (9 sept 2014)
still the best to flash my router?
thanks for your help guys!
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Malachi
DD-WRT Guru


Joined: 17 Jul 2012
Posts: 7209
Location: Columbus, Ohio
PostPosted: Sun Jul 19, 2015 22:11    Post subject: Reply with quote
It doesn't matter. Go to the Asus gui update page upload this ftp://ftp.dd-wrt.com/betas/2015/07-09-2015-r27506/broadcom_K3X/dd-wrt.v24-27506_NEWD-2_K3.x-big-RT-N66U.trx

Watch your pings. When it returns ttl=64, it's done
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Bosfan
DD-WRT Novice


Joined: 19 Jul 2015
Posts: 2
PostPosted: Mon Jul 20, 2015 19:03    Post subject: thanks but worked with the 26138 built file only Reply with quote
Thanks Malachi for your help but
i could NOT flash the lastupdated file you suggested !
Refused twice.
i had to go back to the 26138 built,accepted this time.
thanks again
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Malachi
DD-WRT Guru


Joined: 17 Jul 2012
Posts: 7209
Location: Columbus, Ohio
PostPosted: Mon Jul 20, 2015 19:28    Post subject: Reply with quote
That's weird. Anyway, glad you got it flashed.
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hughc
DD-WRT Novice


Joined: 27 Nov 2010
Posts: 2
PostPosted: Mon Mar 25, 2019 19:16    Post subject: Firmware upgrade unsuccessful. Reply with quote
I'm working with a ASUS RT-N66U, Asus firmware is 3.0.0.4.382_50470-g033b865.

The DD-WRT firmware is dd-wrt.v24-37305_NEWD-2_K3.x_mega.bin and dd-wrt.v24-37305_NEWD-2_K3.x_mega_RT-N66U.trx.

When flashing DD-WRT this message appears(see attachment), "Firmware Upgrade unsuccessful. This might result from an incorrect image or error transmission, please check the model name RT-N66U and verison of the firmware from support site and try again."
Is this something I'm doing wrong or Asus?

AsusPrintScreen.png
 Description:
 Filesize:  301.9 KB
 Viewed:  3215 Time(s)

AsusPrintScreen.png
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whitebeard
DD-WRT User


Joined: 26 Jul 2013
Posts: 120
Location: Canada
PostPosted: Mon Mar 25, 2019 19:30    Post subject: Reply with quote
Did you just buy this router?

I knew Netgear was actively rejecting "foreign" firmwares, but I wonder if ASUS has started doing this too?
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hughc
DD-WRT Novice


Joined: 27 Nov 2010
Posts: 2
PostPosted: Mon Mar 25, 2019 19:43    Post subject: Reply with quote
I purchased the router off Ebay.
I found one more reboot and loaded successfully. Sorry for my confusion.
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Malachi
DD-WRT Guru


Joined: 17 Jul 2012
Posts: 7209
Location: Columbus, Ohio
PostPosted: Mon Mar 25, 2019 20:11    Post subject: Reply with quote
You have an rt-ac66u. Don’t use the firmware for the rt-n66u.
Also, put the router into recovery mode first as the newer ASUS firmware prevent the flashing of third party firmware.
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Per Yngve Berg
DD-WRT Guru


Joined: 13 Aug 2013
Posts: 6867
Location: Romerike, Norway
PostPosted: Wed Mar 27, 2019 19:32    Post subject: Reply with quote
the rt-ac66u FW is for the A1 hardware (Single core MIPSEL).

For the B1 (dual core), use the RT-AC68U FW.
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