› 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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January 23, 2020 at 1:44 pm #5847
Thank you for the firmware. My VDSL2 connection problems have been resolved. DSL-N66U_v9.1.2.3_790-g61d41b5.trx
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January 23, 2020 at 4:55 pm #5848Thank you for the firmware. My VDSL2 connection problems have been resolved. DSL-N66U_v9.1.2.3_790-g61d41b5.trx
Glad the latest Firmware helped

In a completely sane world, madness is the only freedom (J.G.Ballard).
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January 30, 2020 at 7:58 am #5898i am fix that problem. open telnet function connect via cmd console and type (top) and you can see which one process destroy your ram then you can close or stop that service :). by the way upnp service kill all ram almost using %80 ram. so i close upnp and re-open it’s fixed.
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January 30, 2020 at 8:34 am #5905Thanks for advise, good for many owners to know

In a completely sane world, madness is the only freedom (J.G.Ballard).
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January 31, 2020 at 11:27 am #5908Hello everyone,
I bough an used ASUS DSL-N66U N900 modem router some days before. My oldone router is DSL-N16. As I understand ASUS DSL-N66U is still (EOL). For now the Firmware of my ASUS DSL-N66U is the lastone noBeta version 1.1.1.3. Can I have Your oppinion, is it better to continue using 1.1.1.3 version or will be better to change it with Beta version DSL-N66U_v9.1.2.3_790-g61d41b5.trx ?
Thank You.
Stan.
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January 31, 2020 at 11:56 am #5909Do you have a copy of firmware DSL-N66U is the lastone noBeta version 1.1.1.3
If so then it is worth trying the newer beta firmware to see how this works for you. if not suitable then just flash back to 1.1.1.3 .
Alas ASUS firmware’s are a little hit or miss, they fix some problems and create other new issues (sometimes)
Is there any reason you are looking at newer firmware (specific issues) etc. ?
In a completely sane world, madness is the only freedom (J.G.Ballard).
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January 31, 2020 at 12:52 pm #5910Hello and thanks for Your response.
Yes I found on internet and downloaded the 1.1.1.3 . Hope it’s not corrupted.
My internet suplier is Origin Broadb. I don’t have any special network like VPN or smth like that. Just home network and all my devices are working on 2.4 GHz. And it’s looking that Wi-Fi network is more busy than before when it was with ASUS DSL-N16 working. When I try to conect with router for settings menu, sometimes it takes a while to conect. and because 1.1.1.3 is more than three years old I think, that’s why I’m asking is it better with Beta version and are there some more unresolved issues compared with 1.1.1.3.
Thank You.
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January 31, 2020 at 1:00 pm #5911Great you have a copy of 1.1.1.3. and given your issues, I would try with DSL-N66U_v9.1.2.3_790-g61d41b5.trx and see how it goes .
In a completely sane world, madness is the only freedom (J.G.Ballard).
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February 1, 2020 at 12:06 pm #5913Firmware 1.1.1.4 found here: https://us.softpedia-secure-download.com/dl/e66e4f7a7ca9fe3afeec92177c4aedec/5e356995/300591237/drivers/router/FW_DSL_N66U_1113.zip
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February 5, 2020 at 12:39 am #5937i am fix that problem. open telnet function connect via cmd console and type (top) and you can see which one process destroy your ram then you can close or stop that service :). by the way upnp service kill all ram almost using %80 ram. so i close upnp and re-open it’s fixed. @lostcause @uk-sentinel
Don’t have upnp enabled. Seems the firmware has a memory leak somewhere as all versions I tried reboots itself < 14 days. The current beta firmware I’m using reboots every 4 – 6 days runtime with upnp & telnet disabled.
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February 22, 2020 at 7:18 pm #6053What’s the latest version for DSL-AC51 for asus Merlin? Is it stable and secure? Does it get updated frequently?
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February 22, 2020 at 7:25 pm #6054DSL-AC51 is sill supported by ASUS, the latest version is V1.1.2.3_805 released in January this year.
FYI – ASUSWRT-Merlin is not available for ASUS DSL Routers. only there RT models
Hopefully others can advise on how stable this release is ?
In a completely sane world, madness is the only freedom (J.G.Ballard).
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February 22, 2020 at 7:26 pm #6055February 22, 2020 at 7:33 pm #6056Well I wanted asus Merlin and I thought I could get it here.
Alas no, there are third party coder (GNUton) that has produced a DSL build with Merlin, but only suitable for the DSL-AC68U
In a completely sane world, madness is the only freedom (J.G.Ballard).
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March 3, 2020 at 4:46 pm #6139Hi to All!
I have the latest version of Fw: V1.1.2.3_805 for DSL-AC750 and my connection is not good, need more time to be connected DSL, and I must all time wait many time, what is about you guys, and how we resolve this problem…
I must try the V9.1.2.3_743
Thanks in advance
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