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Solved
DNS Error Popup Issues (Round 2)
Using the NETGEAR Orbi RBK852 AX6000 mesh router, since purchased, with various firmware versions (no other routers I've used in the past have this problem) Now currently on Firmware Version v4....
Possible fix:
NAT Filtering > SIP ALG
NAT Filtering is set to Secure and has a tick box to disable SIP ALG upon it checked by default. Unticking that and enabling SIP ALG appears to of improve it's performance, creating a snapper response to device calls and may have of resolved my DNS issue too.
Will mark this as resolved, once fully tested and confirmed.
Fingers crossed might of finally fixed this DNS issue!
The factory reset and resetup of the VLAN seems to of worked well after the DNS Flush. There's been no issues since then.
UPnP I've disabled again, as I consider it a bit of a security risk
IGMP Proxying is enabled as that seems to help with streaming content
Manually cleaned up the Netgear Orbi App Wifi device list as well
I think it was mostly leftovers from the older firmware or first setup of the VLAN?
Otherwise, there was a bunch of blocks in the HOST file which even included blocking Google Analytics on webpages, leading to that error message which the entire page would display for a few second.
Soon after that I had noticed was a Websocket Status 101 - Switching Protocols...
Cache-Control: no-store, no-cache, must-revalidate, max-age=0
Connection: Upgrade
Content-Length: 0
Upgrade: websocket
Stalled
CAUTION: Request is not finished yet!
Not quite sure what that meant, but it's no longer occurring anymore. Has all been heavily tested now, but will reconfirm if resolved after a week or so usage.
Thanks for all your help FURRYe38
Ok, let us know how it goes. Hoping something go blown out and DNS starts working better for you.
Keep an eye on that host file. Should not be lots of entries in there. Only some necessary ones that you or some specific app may have setup.
If uPnP isn't needed then it's ok to disable. uPnP issues were resolved years ago. I've not seen any uPnP issues as I keep it enabled on my router, though I game online so I need it.
Be sure to save off a back up configuration to file for safe keeping. Saves time if a reset is needed.
https://kb.netgear.com/000062080/How-do-I-back-up-the-configuration-settings-on-my-Orbi-WiFi-System
The DNS Error issue might still be there, but whatever triggered it has been greatly reduced. It almost doesn't happen at all anymore and is no longer a hassle for me.
Narrowed it down to the possible following requirements to trigger:
- IPv4 only (IPv6 is unaffected)
- VLAN 10 (?)
- Webpage with a script blocked on it via 0.0.0.0, either with an ad blocker, anti-virus, or the HOST file (HTTP STATUS blocked:other isn't affected by it, rather needs to be status = net::ERR_NAME_NOT_RESOLVED or similar DNS error warning)
- An URL redirect or multiple webpages loading (it could be triggered by half loading a webpage, then quickly going to another, or perhaps using IPTV, Netflix, or Youtube streaming on a device, while going to a webpage on another)
- No DNS cache on those webpages (as soon as it's cached it will work fine every time after that)
- IP Address change might also trigger it (?)
What occurs is it's getting the valid error message from the script called/blocked on the webpage, but displays it over the entire webpage, then refreshes and loads the webpage as normal. There could be a slightly delay/hanging during this before the DNS error is displayed. The refresh is quite instant.
This only ever occurred on the PC and Laptop, never other devices such as the Smartphone while web-browsing on them. Both of those had Spybot originally installed with it's immunization and Spybot Anti-Beacon, which added blocks into the HOST file. Kaspersky Internet Security ad-blocker was also another cause of similar blocking which triggers this issue. It's just due to the way they block scripts on webpages with the Netgear Orbi Router react towards.
It is not affected by:
- uPnP
- IGMP Proxying (those this did help a lot, smooth out the large amounts of steaming -IPTV, Netflix and Youtube)
- Always use HTTPS to Access Route turned on or off
- Adblockers which use blocked: other as the HTTP Status
Hope that might help, if any others have similar issues.
FURRYe38 I was still getting some random webpages displaying "Err_Name_Not_Resolved" before (few second displaying that message, then reloads the webpage normally).
My router and satellites appear to of been updated to version 4.6.8.2 automatically now. However, appears to of done so smoothly. Will see how it goes.
So far since firmware version 4.6.8.2 and a DNS flush, there has been no issues at all. I didn't even need to reboot the router. I don't want to jynx it but looks hopefully fixed!
Ok. Kewl. Lets give it 3 days and then let us know your findings.