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Re: DNS Issues after firmware upgrade

mribeiro
Initiate

Re: DNS Issues after firmware upgrade

Setting the DNS to googles or even the DNS from my provider on my individual devices resolves the issues or seems better. 

Model: R8500|Nighthawk X8 Tri-Band AC5300 WiFi Router
Message 26 of 38
CKopp
Apprentice

Re: DNS Issues after firmware upgrade

It seems like this issue has impacted a number of router models.  Fortunately the solution of resolving DNS at the device level seems to be viable for at least the vast majority.  The fact it has remained unresolved and appears to impact a number of different models suggests the problem may be complex, and the solution complicated.

 

I know some have understandably given up.  To be frank, I have researched other routers, and most seem to have their own issues.  To date, I have not found another I feel comfortable switching to.

 

I have tried many routers over the years, and had the best luck to date with the Netgear models.

 

Given the workaround, I am going to hang in there and hope a new firmware that resolves this will be released soon.

 

Fingers crossed 😐

ISP: Spectrum, Modem: Technicolor, Router: R7960P
Message 27 of 38
nnagreg
Apprentice

Re: DNS Issues after firmware upgrade

Yes,  I had similar DNS problems, struggling for months.

 

My solve/resolve tied back into ENABLING IPv6 under the advance settings.  See my thread below

With latest version of the firmware V1.4.3.88_1.3.50 and factory reset.

Hope this helps you!

 

https://community.netgear.com/t5/Nighthawk-WiFi-Routers/DNS-Hijacking-R8000P-presenting-errors-requi...

Model: R8000P|Nighthawk X6S AC4000 Tri Band WiFi Router
Message 28 of 38
FURRYe38
Guru

Re: DNS Issues after firmware upgrade

Try newer FW as well for the R7960P before enabling IPv6:

https://community.netgear.com/t5/Nighthawk-WiFi-Routers/New-R7900P-R7960P-R8000P-Firmware-Version-1-...

 

Couple of users seem to seen better DNS experiences here on this version of FW so far. 


@CKopp wrote:

I recently upgraded to the V1.42.84_1.3.42 firmware verison on my router. Since the update I am seeing random DNS timeout errors (the probe errors). In most cases, the time out is replaced within 1-2 sec by the actual request going through.  I have verified that this is happening across any DNS service I specify at the router (ISP, cloudflare), and happens accross various local machines, whether on wired or wireless connection. The problem goes away if I specify dns settings on the local machine. 

 

I used fiddler to analyze browser traffic, and can see it occurs when a DNS cache validation happens.  It would appear i am first getting a DNS timeout, rapidly followed by the actual request going thorough.  Interestingly, I have not seen this behavior on the sole IOS device on the network, an IPAD. Not sure if it matters, but I have armor installed.

 

As this behavior appears to directly correlate to the firmware update, and in searching the forums I have seen similar issues on other Netgear routers reported with the latest fireware, I am wondering a few things:

 

1. How many others with the 7960P routers seen this issue with the .84 firmware?

2.Is Netgear aware and working on a fix?

3. If I decide to roll back to the.68 version to fix (as several others have reported on similar model routers) what secuirty updates do I give up?

 

Thanks.

 

 

 

 

 

 


 

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CAX80 Router Mode |  Wifi Router CAX80 (Router Mode) and RBK963 (APMode) | and MK63 (Router Mode) | Switches NG GS105/8, GS308v3, GS110MX and XS505M |

Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: MK63, MR6150, R7000, R7800, R7960P, R8000, R8500, RAXE500, RAX50, XR450, XR1000, EX7500/EX7700

Message 29 of 38
CKopp
Apprentice

Re: DNS Issues after firmware upgrade

Thanks. Interestingly enough Netgear support reached out to me, but have not yet followed through with the contact info I gave them.

 

I upgraded to the newest firmware (.88 version), here is my experience:

 

1. Tried to use update process within Web GUI interface.  That just hung for about 15 min.  So I rebooted router to make sure it was cleared, downloaded new firmware and extracted it to desktop, and used the browse for file update process.  Worked great, uploaded and rebooted on its own as expected.  Version number changed to show update appeared to take.

 

2. Set DNS back to router (which is set to use Cloud flare 1.1.1.2 instead of my ISP).  Did testing.

 

A.   Seems better but not fixed yet.  I tried about 25 sites in rapid sucession, all loaded quickly without error, then I started to get error messages, followed quickly by the site properly loading in 1 -2 seconds.   This is definately improved behavior from before, where it would start at around 15-18 attempts, and take much longer or multiple retries to go through.

 

B.  Error message is different.  Instead of the probe error mesage, the message that flashes up says there is a typo in the web address.

 

c.  No matter how long or how many tries, I could not get to the Netgear support page until I switched the DNS setting on the local machine I was testing with back to the DNS directly.

 

Something clearly has been changed.  Given the behavior I noticed, I am wondering if it is some kind of caching problem, i.e. a cache fills up and doesn't flush under some conditions past a certain number of DNS requests in a certain time frame?  When I get enough time I may set up analysis on the IP traffic to get a better look.

 

I also am contemplating enabling IPV6, however I do have questions about how that impacts the secuirty of my network to issue an external ipV6 address I won't be using??

 

In any event, progress seems to be occuring.  Please keep it up Netgear until this fully resolved for all of us. 😉

 

Thanks.

 

 

 

 

 

 

ISP: Spectrum, Modem: Technicolor, Router: R7960P
Message 30 of 38
plemans
Guru

Re: DNS Issues after firmware upgrade

@CKopp I'd try both a factory reset and enabling ipv6. 

IPv6 was made to be more secure than IPv4. Not saying it is but that was the design behind it. Some of the technologies for ipv6 were rolled out to ipv4 (IPSec)

Current setup: CM2000-> RBKE963B-> Trendnet TEG-S380-> GS716T-> pi-hole
also in AP setup: RAXE500->EAX80
1.4gig download/50mbps upload from Xfinity
We’re members of the public helping out on our own time.
Message 31 of 38
CKopp
Apprentice

Re: DNS Issues after firmware upgrade

I spoke too soon, didn't see the DNS_probe finished message at the bottom.  Same error. Further the more I continue to use the browser, the more it comes up.  Perhaps the reboot was what made things seem better?

 

My concern with enabling IPV6 is that if i understand it correctly, I would be establishing an IPV6 public address on the wan side to the router, but as i do not used IP6 for any devices, I would not see any of the typical signs of compromise if it occured (e.g. a software firewall on one my devices reported malicious activity).

 

PS.  If I do choose IPV6, what do you set the address on the router to?  Auto?

 

Thanks.

ISP: Spectrum, Modem: Technicolor, Router: R7960P
Message 32 of 38
plemans
Guru

Re: DNS Issues after firmware upgrade

Mine lets me just select auto for my ipv6 address.

One other thing you can try doing is using a different ipv4 and ipv6 dns than your providers. 

Current setup: CM2000-> RBKE963B-> Trendnet TEG-S380-> GS716T-> pi-hole
also in AP setup: RAXE500->EAX80
1.4gig download/50mbps upload from Xfinity
We’re members of the public helping out on our own time.
Message 33 of 38
CKopp
Apprentice

Re: DNS Issues after firmware upgrade

I already have tried both providers DNS and different (cloud flare and google).  That makes no difference.  The only thing definitive so far, as been to bypass using the router DNS, by specifing DNS on each machine locally.

ISP: Spectrum, Modem: Technicolor, Router: R7960P
Message 34 of 38
FURRYe38
Guru

Re: DNS Issues after firmware upgrade

Did you first try a factory reset after updating to v.88 and then don't change DNS to anything accept for using default Automatic? 

After the FW is updated on the router and reset and setup from scratch, I would also reboot all devices as well to ensure all DNS caches are cleared...

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CAX80 Router Mode |  Wifi Router CAX80 (Router Mode) and RBK963 (APMode) | and MK63 (Router Mode) | Switches NG GS105/8, GS308v3, GS110MX and XS505M |

Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: MK63, MR6150, R7000, R7800, R7960P, R8000, R8500, RAXE500, RAX50, XR450, XR1000, EX7500/EX7700

Message 35 of 38
FlyingTs
Tutor

Re: DNS Issues after firmware upgrade

Initial results after enabling IPV6 are positive although very limited testing so far. I was able to open a site that wouldn't even open before. Only Windows 10 showing DNS issues. iPad and Android phone seem to work OK.  V1.4.3.88_1.3.50

Message 36 of 38
CKopp
Apprentice

Re: DNS Issues after firmware upgrade

If I enable IPV6, what option should I be using?

 

Auto Detect?

6 to 4 tunnel or?

ISP: Spectrum, Modem: Technicolor, Router: R7960P
Message 37 of 38
FURRYe38
Guru

Re: DNS Issues after firmware upgrade

Try Auto Detect. Even though it might not find anything from your ISP. 

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CAX80 Router Mode |  Wifi Router CAX80 (Router Mode) and RBK963 (APMode) | and MK63 (Router Mode) | Switches NG GS105/8, GS308v3, GS110MX and XS505M |

Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: MK63, MR6150, R7000, R7800, R7960P, R8000, R8500, RAXE500, RAX50, XR450, XR1000, EX7500/EX7700

Message 38 of 38
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