I don't think it have been discussed here, so I'll post to inform people.
I just bought a RT-N12D1 to replace an old Linksys unit (which was running DD-WRT).
I wanted to try the repeater mode of the OEM Asus firmware but I had a lot of trouble with it (It made my main router crash... WHY? lol). I upgraded to the latest Asus firmware (RT-N12D1_3.0.0.4_380_7378-g7a25649.trx). I still had issues so I decided to get DD-WRT for it.
So here's the thing, you can't follow 80sguitartist tutorial if you have the latest Asus firmware since that firmware include some type of protection that won't let you upload any old Asus firmware or third parties firmware.
A nice little popup will come up to tell you because of some change in the regulation (probably FCC) you can't downgrade or use third parties firmware.
But you can get around it using the firmware restoration tool and following the "Unbricking Your Asus Rt-N12 D1" from 80sguitartist post.
Once you flashed the old Asus Firmware: Version 3.0.0.4.374.813, you can follow the tutorial and install DD-WRT.
I wanted to set a repeater bridge. dd-wrt.v24-18774_NEWD-2_K2.6_mini doesn't work for that purpose.
I'm currently using dd-wrt.v24-26125_NEWD-2_K2.6_mini_RT-N12B1 and everything looks fine...
One thing, the repeater will stop functioning if you change the router operating mode to "router" in "setup > advanced routing".
But the repeater seems to work fine if I keep the operating mode set to "gateway".
For some reason router model appear as Linksys now
Firmware: DD-WRT v3.0-r33215M mega (08/25/17)
DD-WRT
Router Model
Linksys WRT54G/GL/GS
LAN MAC
BC:EE:7B:6D:4F:4E
WAN MAC
BC:EE:7B:6D:4F:4D
Wireless MAC
BC:EE:7B:6D:4F:4E
WAN IPv4
0.0.0.0
LAN IP
192.168.1.1
LAN MAC BC:EE:7B:6D:4F:4E although MAC on sticker on router back BC:EE:7B:6D:4F:4C.
Port order changed, check out image attached. Cable plugged in WAN port, but looks like in port LAN4.
Router Name
DD-WRT
Router Model
Linksys WRT54G/GL/GS
Firmware Version
DD-WRT v3.0-r33215M mega (08/25/17)
Kernel Version
Linux 3.10.107 #15794 Fri Aug 25 11:57:59 CEST 2017 mips
MAC Address
BC:EE:7B:6D:4F:4D
Hostname
WAN Domain Name
LAN Domain Name
Current Time
Not available
Uptime
19 min
Working firmware
Router Name
rtn12
Router Model
Asus RT-N12B
Firmware Version
DD-WRT v3.0-r33345 mini (09/11/17)
Kernel Version
Linux 2.6.24.111 #32590 Mon Sep 11 01:14:17 CEST 2017 mips
MAC Address
BC:EE:7B:6D:4F:4D
Hostname
rtn12
WAN Domain Name
LAN Domain Name
Current Time
Thu, 14 Sep 2017 14:46:42
Uptime
16:07
You do realize the RT-N12 version D1 is not and never was officially supported by dd-wrt so any dd-wrt build you install may have weird results.
Totally yes.
Its not a problem to flash back to DD-WRT v3.0-r33345 mini (09/11/17).
ok couldn't resist -- had to check it
Rt-N12-D1
Previous
DD-WRT v3.0-r31924 (05/02/17)
Linux 3.10.105 #14590 Tue May 2 11:59:36 CEST 2017 mips
Reset
Install with option 'After flashing, reset to Don't reset'
dd-wrt.v24-33215_NEWD-2_K3.x_mega.bin
4 LAN ports & WAN are fine and all seems good here.
Seems I remember you having issues with your RTN12D1 before.
Have you changed the CFE? Maybe it is just some different version... I think they were several.
Here is a CFE of one of my RTN12D1 routers if you want to play with it.
I would suggest you backup your own before you start fooling with this stuff.
Direct download ---> http://mrjcd.com/omg/AsusRT-N12_D1.zip (140KB)
also contains picture of back router tag.
mrjcd, thanks for sharing. Checked, my router tag exactly the same.
Tried flash back to DD-WRT v3.0-r33345 mini (09/11/17) this way
1. I set static IP to 192.168.1.15
2. Held the reset switch with paperclip while powering on, getting a long blink on / off on power
3. ping -t 192.168.1.1
and, surprise, did find that port order changed even in this mode. Now router answer for ping when PC connected to ports LAN123 and WAN and dont answer on port LAN4, which seems to be WAN now.
Flashed successfully to dd-wrt.v24-33345_NEWD-2_K2.6_mini_RT-N12.trx being connected to WAN router port, DD-WRT booted, but, surprise, port order remain wrong. :( Router respond to pinging 192.168.1.1 on ports LAN123 and WAN.
Have you changed the CFE? Maybe it is just some different version... I think they were several.
Here is a CFE of one of my RTN12D1 routers if you want to play with it.
I would suggest you backup your own before you start fooling with this stuff.
Didnot touch CFE, can boot up router in CFE mode, just did it now to restore 33345 mini image, but even in bootloader mode now I have wrong ETH port assigment. look strange, going to try to restore asus FW in router.
