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Forum Discussion
dbarker85
Aug 08, 2021Star
Getting DNS_PROBE_POSSIBLE error on R8000
In about the last month and a half, I have started noticing two things: * pings spike every 5 minutes, from about 8-9ms, to over 1000ms, for 5-10 seconds (this messes up Remote Desktop) * DNS_PR...
plemans
Aug 09, 2021Guru - Experienced User
Have you tried a different dns provider?
Like googles at 8.8.8.8 or 8.8.4.4
or cloudfare at 1.1.1.1
what modem/gateway are you connecting to?
dbarker85
Aug 11, 2021Star
This is probably a moot point, as I've installed FreshTomato and will be trying that out.
The modem is a "Smart/RG VDSL2 Modem". Not really relevant since it is the router that is the issue. I know this because:
- When I connect directly to the modem, there is no problem
- When I use a different router, there is no problem
I tried 3 different DNS providers and got the DNS problem when using all of them; OpenDNS, ISP, 9.9.9.9.
It is weird. It started doing this about a month ago.
Anyway, reverted back to a 2006 Linksys WRT54G running DD-WRT...which is working MUCH BETTER than the NetGear even before this problem. That's embarassing.
I have gotten FreshTomato installed (risked bricking!) and will give that a try. I have high hopes, but wouldn't have tried this unless I felt the router was otherwise a lost cause.
- jbnetteAug 11, 2021Initiate
Rolled back to previous firmware version. Problem resolved.
- robjakAug 13, 2021Luminary
dbarker85
if you ever come back to this thread, please give your thoughts on freshtomato. i have years of experience with DD-WRT, but got sick of the bugs in it. so i switched to NETGEAR. It is been rock solid until this last firmware release and the DNS issues. I am thinking about running 3rd party FW again.
- dbarker85Aug 13, 2021Star
Certainly! I'll preface this that I'm hardly a router or networking expert. I'm a long time telecommuter who needs to balance the network; my son has been home the last year doing grad school and an internship, plus there's many other devices, roku's using netflix, etc. Probably like everyone else these days. I use remote desktop a lot, and it has to work well. Zoom and teams calls need to work well also.
Oh and a key piece: I'm fairly rural, so I have 10mpbs up and 1 mpbs down. But when it's working, believe it or not, it works well. I have urban coworkers who brag about their gigabit connection, but who seem to also have frequent problems. That speed doesn't always mean good latency. But it sells well!
We've only used FreshTomato for a day, but so far it looks really stellar. The UI seems really tight, I am not seeing anything buggy. The breadth of features is amazing. I am really stunned at how much the hardware is capable of that is hidden in the stock firmware.
I am particularly intrigured by the QOS and bandwidth limiting features, and also the monitoring features. There are beautiful pie charts that you can use to drill in to what device is hogging bandwidth. I'm just starting to experiment with different priorities...although to be honest, things are working great so far, so it's probably best if I just leave it alone...I just can't help myself, it's a new toy!
I think I said in a prior post, I had used DD-WRT on an old Linksys WRT54G. And I was amazed that it seemed to work really well for us. But it's interface is not nearly as pretty; it's harder for someone like me to really understand all the tweaks. FreshTomato spoon feeds it quite nicely.
But I am confident that, in the future, when I'm doing something and think "why is this so damn slow", I'll have a lot more capability of finding the offender pretty easily.
Another problem I've had in the past is that when I do uploads, it seems to gum up the whole network. I'm talking about like uploading photo's, doing a backup. I'll be curious to see if those problems go away as well.Oh and, my ping spike and DNS Probe issues seem to have gone away entirely. So as far as I can tell, those were both related to the stock firmware.
I will make a point to come back to this thread and comment in a month or so after I give it a more thorough test.
- robjakAug 13, 2021Luminary
Thank you for the great post and i await the one month comment.