For the past 3 days my CAX80 has been rebooting every 4 to 5 hours. I’ve tried connecting the power source directly to an outlet and that didn’t work. I did a factory reset and that also didn’t work. I’ve tried rebooting from the NH app and manually but that also didn’t work. I’ve only had my router for 2 years I’m not sure what to do at this point.

UPDATE: I purchased a new CAX80. During setup yesterday the firmware auto updated to 2.1.3.5. No reboots in the last 24 hours. It has not auto updated to 2.1.3.7. Which makes me think NG has done something to stop the 2.1.3.7 update on new CAX80 setups. NG are the worst. I'll update again if it starts rebooting.

I already had Comcast visit a few days ago. They confirmed there are no signal issues or issues in general. Somebody else earlier on this thread also had Comcast come out and confirm. This is not an ISP issue, it's a firmware issue. I opened a support ticket and referenced this thread. Perhaps if everyone else on this thread did the same we will get a fix sooner? Tickets can be opened here: https://my.netgear.com/support/contact.aspx

Netgear pls fix this issue. I can't do my school work online because the modem reboots whenever it feels like it. 😞

FURRYe38 I'm going to have to disagree about the Auto reboot on any signal issue. Every other month my Downlink light starts to blink and I see multiple links that are not locked and the Router has never rebooted automatically. In looking at my log, I see that the initial Firmware update was initiated Nov 2021As you can see, there are no DoS attacks before this. However, I DO see DoS attacks starting shortly afterwards: AND the IP Address is NOT a DoS Attack, not sure why the Router labels it as such. When I do an IP Lookup it reports:AND I show my IP Address as the one listed as the Source of the DoS attack. SO those who posted about the DoS attack, look at the IP and determine if it is YOUR IP from your ISP. But this still points back to an issue with Firmware .7 since the DoS attacks didn't start logging until AFTER .7 was updated to the Router. Either way, the issue is almost definitely with the firmware. SO again, HOW can we stop the Router Firmware from being auto updated? AND why did it start on or about 11 Jun 22, why not way back in Nov. when the update was pushed . . .

Since downgrading to v2.1.3.5 I have not experienced any random reboots. Nor had I observed any DOS "LAND Atack" events in the Log. Last night when I went to bed, I was still running v2.1.3.5 so I anticipated this was to continue. I was wrong. When I awoke this morning and looked at the UI to see if any reboots occurred in the middle of the night, I discovered my router upgraded to firmware v2.1.3.7. Looking closer at the Log it reflects the router upgraded its firmware to v.2.1.3.7 at approximately 1:20am. After the upgrade the Log reflects twenty or so DOS "LAND Attack" events involving port 2190 and a few DOS "NULL Attack" events. Then at approximately 3:40am the router does a reboot and has since recorded another thirty plus DOS "LAND Attack" events involving port 2190 in the log. Obviously, I am not pleased.Being extremely familiar with Internet security and network security for thirty years, I find it highly improbable and very unlikely my network is experiencing a LAND attack. Especially whereas others are reporting LAND attacks with the SAME port number all of sudden after upgrading the firmware.For reference a LAND attack is often a human (user) generated attack, designed with the intention of causing a Denial of Service (DoS). It involves the user injecting traffic into the network with the source IP and destination IP addresses being the same as well as choosing a port number (1-65535) to be used as the source and destination ports. The fact this attack is being recorded by multiple persons with the same port number (2190) is highly indicative this event is being generated by the router itself.In all likelihood there is something wrong with firmware v.2.1.3.7

CAX80 keeps rebooting | NETGEAR Communities

113 Replies

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rksalm
Aspirant
Jun 19, 2022
Just to update - another day, another reboot at 3am here too! Thanks Netgear!
milad6387
Guide
Jun 19, 2022
Update on my side.

Xfinity came and tested the line. They said their signal is coming through clearly.

He showed me that the downstream light was blinking so it was not bonding correctly.

This was all on .7.

Downgraded to .5 and the downstream light was solid and everything worked fine.

Again everything looked just perfect when the xfinity tech checked the system.

I’m tempted to get a new router, but I spent a couple hundred on this September 2021. I’d rather not toss it.
- brettdotcom14
  Aspirant
  Jun 19, 2022
  i believe you can add me to this list as well. my ISP is optimum. my cax80 resets multiple times a day. the only difference is when mine resets the time resets as well and has to resync, might be an ISP thing. i may try to downgrade to .5.
  
  its just incredibly annoying, streaming whatever, online gaming, any kind of pause kills it. especially when you invest so much into something that is suppose to be top of the line.
  - Omnitron
    Guide
    Jun 19, 2022
    In the meantime, does anyone know if it's possible to use the CAX80 as a router only (if so, which ethernet port acts as "input"), and use an old Arris Surfboard as my modem? Or do we think the CAX80 firmware issue is on the router side and not the modem side?
gadeyka
Aspirant
Jun 19, 2022
Let me on board guys.

I have the same issue with firmware v 2.1.3.7 causing reboots. My ISP is xfinity.

Just want to point out what I noticed. The Current System Time located on Cable Connection tab is defferent for one hour bitween my current local time. But the time is correct on the tab of NTP Settings.

I'm not sure if this was on previous firmwares and if it affects the reboot issue.
- kinghq1
  Star
  Jun 20, 2022
  Alright, first off I am NOT an employee of NG. As a consumer, we will do what we fell we need to do. However, I am in Data Storage so I have better understanding than most when we can't work the way we are use to working. My Company guarantees 5 9's, which means that if you use our products for your production, you will not be down to any issue for more than 5 minutes in a 24/7/365 operation.
  
  Now, with that said, NG has only known about this for the last week, as far as I can tell. We need to follow the process and allow it to work before we go to the Next step. Yeah, it sucks that our $500 product no longer works and that most of us have no warranty because they are past the warranty period, in my case 2 years. As soon as you walk out the preverbal door, the tech is obsolete. That is technology. If you aren't good with that, then don't have any tech. I'm happy with the 2 years I've gotten out of this. The next step is to call their Support, but without a warranty you will have to pay. Again, that is the cost of technology. MOST of us don't have cars with warranties, mine expired last year, I'm not going to get mad at Jeep because something breaks. Things wear out. SO call, pay for support. Once they agree it is THEIR issue, then you can ask that you be reimbursed.
  Seeing that some of us aren't as severe as others, NG will need to get a better understanding by talking to us directly. I only have a reboot once a day, around 3am local time, other have posted they are getting constant reboots, loosing settings, etc. SO FAR I'm just getting the reboot once.
  
  Now then, again:
  1) The DoS Land Attack is coming from YOUR IP ADDRESS!!! It is not an outside attack. This IS being caused by the .7 FW
  2) New modem DOES NOT resolve the issue
  3) The time issue is VERY easy to fix:
  - Under Advanced click on Administration > NTP Settings. Change the GMT time to what covers you. IF you are not sure, google
  "What GMT am I located in" and it will show you. THEN click the box next to Automatically Adjust for daylight savings time. Problem
  should be resolved. HOPEFULLY Congress will get it's act together and do away with DST once and for all. This is for another topic
  😄
  4) Finally, call support. Pay for support, we can't get this addressed through the Forums without an official process.
  - tfc3000
    Star
    Jun 20, 2022
    kinghq1 I called support. After 2 hours they decided they would send me a new CAX80. I purchased a new CAX80 in the mean-time so that I didn't need to wait for it to arrive. The new CAX80 did not fix the issue. So while what you are saying works in theory, it does not work in practice. NG support are idiots reading from a script. Oh by the way, NG support never followed up to get my address to send the new CAX80.
milad6387
Guide
Jun 27, 2022
It does seem like the restarts have gone away, which is good.

However, I do see that my downstream LED keeps blinking. It seems like it is not bonding.

Can those of you who had the internet restart problems check to see if your downstream LED is solid or blinking?

Thank you.
- FURRYe38
  Guru - Experienced User
  Jun 27, 2022
  Please post a copy and paste of the modems connection status page.
  
  milad6387 wrote:
  
  It does seem like the restarts have gone away, which is good.
  
  However, I do see that my downstream LED keeps blinking. It seems like it is not bonding.
  
  Can those of you who had the internet restart problems check to see if your downstream LED is solid or blinking?
  
  Thank you.
FURRYe38
Guru - Experienced User
Aug 30, 2022
Any progress on this?

Moreno279 wrote:
For the past 3 days my CAX80 has been rebooting every 4 to 5 hours. I’ve tried connecting the power source directly to an outlet and that didn’t work. I did a factory reset and that also didn’t work. I’ve tried rebooting from the NH app and manually but that also didn’t work. I’ve only had my router for 2 years I’m not sure what to do at this point.
HarryWillson
Aspirant
Sep 13, 2024
I dont find my reply??
HarryWillson
Aspirant
Sep 13, 2024
Where is my replys Lol

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CAX80 keeps rebooting