[jcdole]

This my network hardware :
Fiber is connected to my isp box ( bouygues telecom )
One eth connection goes directly to a TV Decoder
A second one goes to an old netgear router FVS318G V2
From this router one eth connection goes to a netgear router R6300 V2 with a DD-WRT firmware v3.0-r47495 std (09/28/21) which is updated time to time.
All computers are connected to that router.

This configuration are like this for a very long times.
There is one computer running only windows 10.
There is two others configured in dual-boot windows-linux
Up to begin of 2026 windows was version 10.

All linux is leap 15.5, 15.6, 16.0 from Opensuse.
Linux is not concerned.

My problem arise when I migrate from to windows 11 25H2
The migration by itself does not give errors.

The problem concern the connection to different Microsoft servers.
1) for activation
2) Microsoft Update
3) Microsoft Store

I ask for help.
3 Microsoft technician from their office, reinstall windows but connection to Microsoft servers continue to failed.
The forth technician failed also but ask me to connect the computers directly to the ISP box.
Then miraculously every thing return to normal :
1) for activation
2) for Microsoft Update
3) for Microsoft Store

The ISP box is updated silently by the ISP company
The last update of the dd-wrt firmware is from 09/28/2021
The netgear router FVS318G V2 was not updated recently and use ssl 1.1 only.

It seems that Microsoft make changes in 25H2

Does somebody has an idea on what happens.
I cannot leave a cable just to use it for update times to times.

Than you for helping or comments.

[kernel-panic69]

I am wondering if I need to try bypassing DD-WRT on one of my PCs as well. But then again I am considering Leap 16, Tumbleweed, Fedora Workstation and Fedora KDE. My laptop upgraded to 25H2 just fine behind the ISP router. If switching which router I am connected to changes things, then perhaps it's something to look into. I am using DD-WRT v3.0-r64210 std (03/31/26), so this could be something Microsoft did, not necessarily DD-WRT. Of course, as I type this and check if I can use Wi-Fi, I must've had it disabled when I upgraded to Win11 or a recent manual update b0rked it. Then again, the CPU is unsupported, so it may be a contributing factor as well.

[jcdole]

[Fried Chicken]

I don't see any DD-WRT specific reason this should fail;
not being able to reach microsoft servers sounds like a DNS problem?
What happens if you try to ping them directly, even from the other computers that are working?

Maybe a firewall setting that changed. This is a real mystery.

[kernel-panic69]

The conlclusion is my case was probably an excercise in futility or a bad hacky install. I will have to unplug ethernet from the PC, connect my laptop to see if it breaks those things or not - as well as connect to upstream ISP router and see if updates magically start working or not. If so, it's just a matter of inconvenience. But I have no idea what in DD-WRT would've broken it.

[jcdole]

I have by-pass the R6300 V2 by connecting one computer directly to router B which is connected to the ISP box. I have use a long Ethernet cable to make the test.

I can connect to MS Store and download a game.

So the problem is in the DD-WRT configuration.
I have upgraded ther firmware to DD-WRT v3.0-r64533 std.

Any help is very welcome.

[jcdole]

[kernel-panic69]

My issue is "service cannot be reached"... but again, the PC in question is getting an SSD to replace the mechanical drive and migrated to Linux, so if this is something that needs attention, need specific diagnostics as to why it's "broken"; also it may be "broken by design"; and 64600 is the current release.

[Alozaros]

In my case...
Win 11 Home with top specs i9, nvd 4080 laptop...bloody Windows 'shait'...self downgraded to an old version and doesn't want to move into 25h2 or whatever and stopped receiving updates at all.., Hours lost, dealing with the issue, tons of threads read, discussions and ect. outcome...
Win11 doesn't like VPN, nor Encrypted DNS, nor any of their telemetry websites blocked, neither likes offline account, so yes they clearly want to spy on you badly, they know any move you do, any of your passwords and ect. i did a fk all of those telemetry sites blocked, as well did a military grade setup to restrict this and that, wireshark all their activities...until i tailored it to my needs, nicely working and keeping up with updates (no Vpn or EncryptedDNS when doing those)...and... they screwed it, just to tell me now, you'd need to reset it and start all over.. And nope offline account is not supported anymore...and we do need that telemetry constantly on, otherwise no updates for you...well i had to go back to Win10pro and gradually completely move to Linux, moreover after and update Windows just screwed my Linux partition on my Win10 and it was a big mess too..
So, yes Linux is not that stable, nor 100 % safer, but at least no spying shit...and you have full control, over services, modules, binaries and ect. sadly my Parrot OS broke after moving to k7.xx Echo and it took me a hell of the time to recover it and still not 100% there..and i might just reinstall and start from scratch that Linux, something that doesn't happen on me for a long time...Previously been using Win7 ultimate for a decade+, than moved to Win10 and ever since i touched Win11 i nearly cried twice I Don't blame routers but if certificates are screwed and Openssl too yep you may have troubles...altough im running last builds 64600 atm, my favorite was 62606 and i've OpenWRT on my main ATM until things with DDWRT get back to the moment i want to use it as a main...nope im not happy with OpenWRT at all..it can be a pain in the ass too...

[jcdole]

That does not help me to configure DD-Wrt

[Alozaros]