› UKTH forums › 🛜 Wireless Routers & Modems › ASUS & Wireless › Latest Beta Firmwares for DSL-AC51 to DSL-N66U incl. DSL-AC750 Latest DSL ASUSWRT firmware v9.1.2.3_502-g2bdb05b now available. (latest firmware’s are at end of threads) For following ASUS DSL Modem Routers: DSL-AC51 DSL-AC52U DSL-AC55U DSL-AC56U DSL-AC750 DSL-N10-C1 – (extended beta support...
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UK Sentinel.
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May 1, 2020 at 7:59 am #6847
Great news about memory usage and finally working well for you and your settings (I will relay this positive news back to ASUS)

Think this time was just lucky that it freed-up RAM by itself. Will report the setting bug once I am sure about it. Not a big deal, just for reporting to the Asus FW team.
How did the six days freeing up RAM progress, is router still up and running with latest firmware ?
In a completely sane world, madness is the only freedom (J.G.Ballard).
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May 1, 2020 at 11:00 pm #6859No it went down as usual after 6 days, I found the culprit, its the wireless scheduler.
Every time it cycles the WiFi radio it uses extra memory until you runout (approx 6 – 7 days) at ~4MB.
Firmware Version:v9.1.2.3_854Attachments:
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May 3, 2020 at 4:12 pm #6957Hey nice Forum. Im installed Beta 790 for DSL-N66U but cant find OpenVPN client, is there any working firmeware for DSL-N66U with working OpenVPN client??
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May 3, 2020 at 4:41 pm #6961Hey nice Forum. Im installed Beta 790 for DSL-N66U but cant find OpenVPN client, is there any working firmeware for DSL-N66U with working OpenVPN client??
Thank you – I have long since sold my DSL-N66U – but I will ask ASUS incase nobody else responds
In a completely sane world, madness is the only freedom (J.G.Ballard).
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May 3, 2020 at 8:12 pm #6965Why all downloads on Asus dead for dsl-n66u? https://www.asus.com/Networking/DSLN66U/HelpDesk_BIOS/
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May 3, 2020 at 8:35 pm #6966The DSl-N66U is no longer supported by ASUS and for some strange reason, they removed all previous firmware’s.
An error I believe they made, I have asked ASUS to put back the firmware’s which was available when the router was within its support lifecycle, but did not get a response from ASUS

In a completely sane world, madness is the only freedom (J.G.Ballard).
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May 3, 2020 at 8:46 pm #6967Ok thanks for response. Is there any change to modify firmeware to add openvpn client?
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May 4, 2020 at 6:45 am #6968Ok thanks for response. Is there any change to modify firmeware to add openvpn client?
@ gnuton is doing some interesting work for the various MediaTek based DSL Routers, but I do not believe he has done work specifically for the DSL-N66U currently.
https://www.snbforums.com/threads/openwrt-custom-firmware-for-asus-dsl-routers.56478/
Update: I have just had feedback from ASUS regarding OPEN VPN and your DSL-N66U
———–
Hi xxxx
Due to memory concern, this model could not support OpenVPN.
In a completely sane world, madness is the only freedom (J.G.Ballard).
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May 12, 2020 at 6:25 am #7180latest beta firmware v9.1.2.3_858 now available. This version addressed Live Update issue.
https://www.asuswebstorage.com/navigate/a/#/s/FE1276FC46EC4F1DBFC055BCA2F284FFY
Note: normal ASUS T&C’s apply, see top of Forum
In a completely sane world, madness is the only freedom (J.G.Ballard).
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May 13, 2020 at 11:04 am #7222en son beta ürün yazılımı v9.1.2.3_858 yayınlandı. Bu sürüm Canlı Güncelleme sorununu ele aldı. https://www.asuswebstorage.com/navigate/a/#/s/FE1276FC46EC4F1DBFC055BCA2F284FFY Not: normal ASUS T & C’ler geçerlidir, Forumun başına bakın
Snr auto 8 dsb , How’d I fix it fixed?
Wifi does not work stably
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May 13, 2020 at 11:12 am #7224@Caner Özcan – did the older firmware work better ?
In a completely sane world, madness is the only freedom (J.G.Ballard).
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May 13, 2020 at 11:35 am #7225old firmware 1.1.2.3_805
good except wifi
Snr auto 8 dsb ? How’d I fix it fixed
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May 13, 2020 at 11:46 am #7226old firmware 1.1.2.3_805 good except wifi Snr auto 8 dsb ? How’d I fix it fixed
Understood – Are you using ADSL or VDSL as they are different to adjust SNR
is 8 SNR, is it to low/high for you ???
VDSL – To fix SNR at 8 dB, go to Administration > DSL Setings (Stability Adjustment) and choose 8dB ?
ADSL- will depend what your current SNR is ? (usually used if connection is unstable) to increase SNR value
e.g, current SNR = 7dB and you want 8 dB, choose -1 dB from ADSL Stability Adjustment
7 – ( -1) = 8
(if my memory serves me well) 
In a completely sane world, madness is the only freedom (J.G.Ballard).
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May 19, 2020 at 12:23 am #7367Hello, I am tech writer and also an engineer from Turkey and we are big family that sharing infos, experiences about ASUS modems.
I can write feedback, just let me know if any assist needed.

Sorry for inconvenience about sharing link or something, i just wanted to show how big family we are, i don’t intent and need for advertise, just loving all tech equipments and help people.

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May 20, 2020 at 10:09 pm #7432(Possible Spam). – Admin
@sentinel actually he was right :D There are huge followers in that forum in Turkey, who want to buy Asus modems or try to find some answers on there. The manager of the topic, they are following your news in here :D Give a chance them
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