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DNS Issues after firmware upgrade
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.
If I enable IPV6, what option should I be using?
Auto Detect?
6 to 4 tunnel or?
37 Replies
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Try newer FW as well for the R7960P before enabling IPv6:
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.
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. đ
Thanks.
