DNS Issues - SFR?

Question

Hello  It has now been a month that my computer has a DNS problem. I have been scouring the internet for solutions but to no avail.  Symptom: No connections possible even though the Wi-Fi icon doesn't indicate any problems (no exclamation points). I still do a "right click" and "troubleshoot" and after a while it tells me Windows can't communicate with the device or resource (primary DNS server) or The DNS server is not responding, but after this action, the internet starts working again... until the next time. Sometimes everything works fine for several hours, and other times I have to troubleshoot every 5 minutes, like right now.   What I have tested: ﻿﻿﻿﻿Changed the DNS servers, replaced with "208.67.222.222" and "208.67.220.220". Cleared the DNS cache with ipconfig /flushdns.  Nothing works, and it's getting worse. I have run virus scans with Malwarebyte and Eset, but my computer is clean. Just to write this email, the internet dropped 5 times! To send this message, I have to do the whole process to get a slot of internet.  I hope you can help me resolve this issue.  Thank you in advance.    Configuration: Windows / Chrome 62.0.3202.94

meliss29 · Accepted Answer

Good evening, I have been in your situation. Last year, I was with SFR, using a wifi connection, I had the nb6v box and constantly had issues with the DNS server. I can assure you that it comes from SFR and the only thing to do is to change operators. I tried countless solutions and downloaded tons of stuff that were useless, I took my computer for repair at Fnac where the wifi worked perfectly with no DNS issues. Since December, I have been with Bouygues Telecom and I have no connection issues with wifi, DNS, etc. After, you shouldn't listen to them at SFR, they are idiots, for them the problems always come from our side.

kaneagle · Answer

Hello, Press Windows + XSelect --> Windows PowerShell (admin)orCommand Prompt (admin) and hit Enter. Type these 8 commands and press enter after each:ipconfig /flushdnsnetsh winsock resetnetsh winhttp reset proxynetsh winhttp reset tracingnetsh winsock reset catalognetsh int ip reset allnetsh int ipv4 reset catalognetsh int ipv6 reset catalog Restart the PC. -------------------------------------------If the problem persists:Shut down the PCUnplug the modem (box) and router from the wall outletWait a few minutesPlug the modem and router back into the wall outletWait for all the lights to be onStart the PC. --Human beings are at their best when things are at their worst.

Malekal_morte- · Answer

Hi,  You should try testing with another device because it might be your internet connection.  -- Please press a key to continue the disinfection...

Malekal_morte- · Answer

Open a command prompt: https://www.malekal.com/ouvrir-invite-de-commandes-windows10/ type: netsh wlan show interfaces  give the content here.  How far are you from the router approximately?  -- Please press any key to continue the disinfection...

Malekal_morte- · Answer

I'm wondering if it really comes from your computer?  There are several threads about these DNS issues since November 16: https://forums.commentcamarche.net/forum/s/dns  and they are all with SFR.... So either there was an update on the SFRBox, or something else. In any case, I find that there are quite a few similar threads with the same ISP.  SFR on these issues:  https://forums.commentcamarche.net/forum/affich-34989934-problemes-avec-serveur-dns#p35020713  https://forums.commentcamarche.net/forum/affich-35019526-problemes-de-dns#p35020706  https://forums.commentcamarche.net/forum/affich-35007822-windows-10-le-serveur-dns-ne-reponds-pas#p35020716  https://forums.commentcamarche.net/forum/affich-34989161-message-dns-probe-finished-no-internet-intempestif  both are with SFR: https://forums.commentcamarche.net/forum/affich-35004647-gros-probleme-de-dns  https://forums.commentcamarche.net/forum/affich-35010419-connexion-internet-tres-perturbee  On my site: https://forum.malekal.com/viewtopic.php?f=4&t=58426  etc.  EDIT - November 27: https://forums.commentcamarche.net/forum/affich-35005838-probleme-de-connexion https://forum.malekal.com/viewtopic.php?f=4&p=443388  EDIT: on their forums: https://www.sfr.fr/cas/login?service=https://la-communaute.sfr.fr/auth/j_spring_cas_security_check#M47881 https://la-communaute.sfr.fr/t5/wifi-connexion-filaire-et-d%C3%A9bit/dns-probe-finished-no-internet/m-p/1967615#M47457 https://www.sfr.fr/cas/login?service=https://la-communaute.sfr.fr/auth/j_spring_cas_security_check#M5224 https://la-communaute.sfr.fr/t5/wifi-connexion-filaire-et-d%C3%A9bit/coupures-fr%C3%A9quentes-de-connexion-en-wifi/m-p/1963770#M47285  EDIT December 10: - https://forums.commentcamarche.net/forum/affich-35062022-connexion-sautant-un-nombre-incalculable-de-fois - https://forums.commentcamarche.net/forum/affich-35049224-problemes-divers#5  EDIT: I stopped reporting the threads here, but new ones come up regularly. For example, at the time of editing: https://forums.commentcamarche.net/forum/affich-35143317-comment-faire-permanent-commande-netsh-winsock-reset-all  ~~  All the usual Wi-Fi disconnection tricks have been attempted: https://www.malekal.com/resoudre-les-deconnexions-wifi/ - uncheck the device disconnection - driver updates (anyway, it's never the same Wi-Fi card) - channel change - remove the Microsoft virtual card - Disable IPV6  Reinstalling Windows 10 changes nothing and for some, it works well with a phone or on another box. So it really comes from SFRBox  Windows 10.  We need to inform SFR: I tweeted this: https://twitter.com/malekal_morte/status/939829449314402304 We need to inform SFR. Post on the forum mentioning the problem and this link: http://www.commentcamarche.net/forum/affich-35011961-problemes-dns-sfr#14 Contact support explaining the situation: - several users affected - it works with other routers/boxes/networks.   Please press a key to continue the disinfection...

kaneagle · Answer

Press Windows + R Type --> devmgmt.msc and OK.  What do you have in network adapters?  What is the brand and exact model number of the PC?   -- The human being is at its best when things are at their worst.

Malekal_morte- · Answer

I am adding this somewhat old topic: https://forums.commentcamarche.net/forum/affich-35010419-connexion-internet-tres-perturbee another one with SFR.  The Wifi card is a Realtek.  Please press any key to continue the disinfection...

Malekal_morte- · Answer

Someone can test this: https://forums.commentcamarche.net/forum/affich-34989161-message-dns-probe-finished-no-internet-intempestif#20  In Cortana, type command prompt In the results, right-click on it and then Run as administrator.  Paste:  netsh interface ipv6 set Teredo enabled  And if it's not better, for the tinkers, go to the management interface of the SFRBox: https://assistance.sfr.fr/internet-tel-fixe/box-nb4/configurer-acces-interface-web-administration.html  Try for example to switch the radio mode to 802.11n The speed will be worse, but it's just to test if there are any disconnections as well. => see the first table: https://www.malekal.com/connaitre-debit-type-de-connexion-wifi-windows/  Please press a key to continue the disinfection...

Heimm · Answer

Hello, So for me, after several tests, the problem is similar on my girlfriend's PC and my smartphone. So it's definitely SFR. I wrote to them, and they told me they are diagnosing my box. It's getting better! It still drops but only 2 or 3 times a day!  I think I will wait for them to resolve the issue upstream, I'm glad my computer is fine.  Flx13, did you try calling SFR?

kaneagle · Answer

Go to Device Manager Network Adapters Right-click on --> Intel(R) Centrino(R) Wireless Uninstall  Click on --> Action Scan for hardware changes.  -- Human beings are at their best when things are at their worst.

Malekal_morte- · Answer

I browsed the SFR forum, where there are quite a few problems. Apparently, disabling WPS can resolve the issue.  Follow this page: https://assistance.sfr.fr/internet-tel-fixe/box-nb4/configurer-acces-interface-web-administration.html Disable WPS to test.  -- Please press a key to continue the disinfection...

kaneagle · Answer

What is the brand and exact model number of the PC?  -- The human being is at its best when things are at their worst.

kaneagle · Answer

my girlfriend who has a brand new Lenovo has the same issue  So, the problem likely comes from the modem (SFR)?  Humans are at their best when things are at their worst.

Malekal_morte- · Answer

I asked the question here https://forum.malekal.com/viewtopic.php?f=4&t=59051&p=443557#p443557  Just to see if you have the same one. Which box is it?    It would also be good to mention the region.     Please press a key to continue the disinfection...

Axelit0 · Answer

Hello everyone,  Similar case for me. SFR even changed the box but the issue is still there only with my laptop on Windows via Wi-Fi. With a cable, I don't encounter the problem, nor do I on our two Android phones... This story is driving me crazy.    " Name  : Wi-Fi  Description  : Intel(R) Dual Band Wireless-AC 3160  GUID  : 5abfe45d-944f-4b02-8c4b-5b36d580c210  Physical address  : 30:3a:64:ce:64:95  Status  : connected  SSID  : SFR_59B8  BSSID  : 44:ce:7d:96:59:bc  Network type  : Infrastructure  Radio type  : 802.11n  Authentication  : WPA-Personal  Encryption  : CCMP  Connection mode  : Automatic connection  Channel  : 1  Reception (Mbits/s)  : 72.2  Transmission (Mbits/s)  : 72.2  Signal  : 99%  Profile  : SFR_59B8 "

Malekal_morte- · Answer

If you want to move things forward, you need to answer the questions above to at least see if it's the same box that's involved: https://forums.commentcamarche.net/forum/affich-35011961-problemes-dns-sfr#45  -- Please press a key to continue the disinfection...

Malekal_morte- · Answer

Two new victims: - https://forums.commentcamarche.net/forum/affich-35062022-connexion-sautant-un-nombre-incalculable-de-fois - https://forums.commentcamarche.net/forum/affich-35049224-problemes-divers#5  You should contact SFR to get them to take action.  -- Please press a key to continue the disinfection...

meliss29 · Answer

Don't bother trying to contact them, they're useless! They treat people like idiots, in addition to being bad faith! For those who don't know me, I was also with SFR and I had that damn DNS server problem too. I switched to Bouygues and I no longer have any issues with that! You should do the same! ;) Have a good evening

PaulHenri9 · Answer

Hi there!  I empathize... Exactly the same problem, which has finally been resolved on my end!  For your information, this issue is reportedly encountered by some users of Windows 8.1 and 10 who are with the providers SFR and Orange. I can't remember where I read this, but it's stuck with me ^^  After a week of research, I finally managed to solve the problem by following these steps:  "device manager" --> "network adapters" double click on "intel dual band ..." Then two things to do:   1. "Advanced" tab --> in the dropdown menu, select "Wireless mode", then choose "value 4. 802.11b/g"   2. Power management --> uncheck the box "allow the computer to turn off this device to save power"  I also fixed the DNS by using those from OpenDNS (you can find them on the Wikipedia page, for example...), but I'm not sure this step is mandatory.  And one last thing, if you haven't already done so, remember to manually update your network card driver! Windows doesn't find it on its own, you need to go to the Intel website and download the correct driver.  I hope this will resolve the issue for you and others in the same situation!  Paul

Traxmix · Answer

I am also a victim of this problem and a SFR customer as well.
I am keeping an eye on this post hoping that a clue will be given.
Has anyone managed to get any information from SFR? Apart from reiterating that it comes from my PC, they don’t want to hear anything.

--
Best regards, Traxmix.

JeanMi · Answer

I had the same issue with a wired connection, a W10, and an SFR 4K box.
I went into the Windows Defender Security Center and turned off the firewall, and everything works wonderfully.
I suppose that part of the connection code of the SFR boxes is interpreted as an attack by the Windows firewall.
Test it and let me know if it solves your problem.

Martial · Answer

Has anyone tried changing their Wi-Fi channel?

marcelvicaire · Answer

Hello,
I'm experiencing the same issue with slow loading or failure to display internet pages on my new Win10 PC, but not with my Android devices or Vista PC.
Is it a network card problem? No, it’s the same with a USB Wi-Fi adapter.
Noticing a DNS address resolution issue, I modified the network card properties from automatic DNS resolution to using the following DNS addresses: 8.8.8.8 and 8.8.4.4 (Google)
Well, now there are no more problems.

camille · Answer

Hi,

I had the same problem with the Wi-Fi icon not signaling anything, internet access for a few minutes and then nothing, the same Windows diagnostic even though I just bought a new computer.
I looked up some solutions, there was a guy explaining how to change the DNS server. But while digging a bit with his explanations, I found the magic button for my case.
Actually, there’s a box that allows my computer to turn off my network to save battery. Since I unchecked that box, no issues, internet is responsive and stable.

If by chance you want to dig around there, go to the control panel > "network and internet" > "network connection" or "network and sharing center" accessible by right-clicking on the Wi-Fi icon, you should get there one way or another.
Then go to "change adapter settings" (that's what's displayed for me, maybe you have a different wording, I can't say)
when I get to that point, I find my Wi-Fi icon > right-click > "properties" > "power management" > and there you will find your little box ^^

I'm not saying it's the solution to your problem, but since it seems similar to mine, I’m still allowing myself to give you a lead. Good luck.

Noway · Answer

Don't look any further. There has been a security flaw in the DNS of SFR Boxes since November 2017. It is still not patched! Type the following command in "cmd": nslookup -type=txt -class=chaos version.bind "IP of your router"  If the displayed version is lower than 2.78, your connection is vulnerable to DNS spoofing.

Polotek · Answer

Hello everyone, I sincerely think this is due to the WIFI network. I'm just like you, I have the same problem and my computer is new (it's been a week).

I have an SFR Box, and I'm sure that if I call customer service, they will do everything to say that it's my computer that's misconfigured or make me restart the box (which I've done 4 times today). Or that my SPL boxes are not SFR, so it's the boxes' fault!!! What a bunch of clowns (to stay polite)

All this while following what's shown on their computer screen!!

I'm being patient, waiting to change providers or get fiber!!

lyliane06 · Answer

Hello, I'm having the same problem. I just subscribed to Red by SFR. Big mistake!!!
Already, we can't connect the TV decoder and the nb6v2 box via Wi-Fi, plus there's a loss of connection even though my computer is well connected.
I found a "possible" solution that seems to work, but for how long?
https://www.sfr.fr/cas/login?service=https://la-communaute.sfr.fr/auth/j_spring_cas_security_check
If it can help
Solution from hachemcress, thanks to him.

Ray66000 · Answer

I don't know what to do anymore, between flushdns, changing DNS via OpenDNS or Google DNS, I have no idea. Have you found any solutions since then?

Polotek · Answer

Hello everyone,

The problem with SFR is that, apart from hiring incompetent people, they are asked to read the technical sheets that are on their computers!! The same issues arise multiple times, with different people, but the same response!!

“Sir, you need to restart your Box, etc......”

I’m waiting for summer to end and I’m switching providers!! After all, as the saying goes, “you never know what you’ll get elsewhere,” but it might be better!!

But I’ve had enough of being in the next room to the box, having to unplug and replug it, and having a connection as if I were 100 meters away!!! Meanwhile, my wife has no issues and my computer is brand new!!!

I’m looking at the offers from different competitors: network, customer service, etc...

slowdive · Answer

same problem

Traxmix · Answer

Good evening, the problem definitely comes from the ISP. I asked to change the modem to switch to a completely different model. Since its installation, I haven’t noticed any more connection drops on the PC in question.
Request your internet provider to simply change the modem for a newer model. Good luck to those for whom the problem persists.
(For SFR, the issue seems to come from the NB6 modem, avoid this one)

Etiennelerequin · Answer

Hello, I am like you, with the same problem and I just found this in the settings of my nb6 box (network v4/filtering) Could this be the key to all these issues?

DNS Issues - SFR? - Page 2

Clayton tv stuck after reset

Texture issues in enshrouded

Big fish games are they worth it?

Saracroche: the effective french app against phone spam

How to get the character µ on the android keyboard.

Psp street wlan switch.

Sims 2 psp: the complete game guide...

Format my packard bell pc

Why won't my computer recognize my headphones anymore?

Hibernate command