[DoS attack] LAND Attack SPT:2190 DPT:2190

That is a heck of a theory.  And some of it is technically true.  Like Charter/Spectrum not assisting in changing the IP address.  It's not that they cant, they can, and will, if you have a business account. But they wont, cuz you dont, have a business account.  I'm a poet and didnt even know it. Like I said some true, some not true. Downgrading works, the DoS goes away entirely with 2.1.3.5. But! It is also a complete waste of time since it is auto updated every single night by Spectrum, and you cant stop it, thanks NG! So, your warning not to downgrade is correct and incorrect all at the same time.

I have been having firmware 2.1.3.7 issues for a while as well.  I am not going to go over everything I've done nor provide logs.  I just finalized my RMA and NG is sending me a new (or used, who can really tell with these guys) cax80, with all the stupid turns, twists, and jump though hoops involved with that process.  It's takin almost two months to get to this point.  Dumbest support ever.  A complete waste of time but hey... you guys keep saying your not having issues so... worth a shot, right.  See?  Correct and incorrect all at the same time.

As for the Null attacks, the cax80 is reporting them rarely and from everything i've seen, it's doing its job and stopping them.  As for the [DoS attack] LAND Attack SPT:2190 DPT:2190, that is 100% 2.1.3.7 firmware related. Since I am not always right, a very slim 0.05% possibility it is a defective hardware issue... that could be addressed by correcting the dang firmware!

Not to be ungrateful or anything, I appreciate the assistance as do others.  But there are many threads and a MASSIVE security alert dump on 6/29/2022 that covers this problem on the CAX80 but on previous firmware revisions.  Unfortunuately, I'm going to make you do the same thing I had to, go through them all one by one, since there is nothing to indentify the content in the alert. No direct link for you! Here is the link to all alerts... https://www.netgear.com/about/security/ I would highly recommend that if your going to assist, you go through them all, make a few notes... well, unfortuantely, a S*** ton of notes with that crazy dump... Holy Jebers!  Its like the Whitehouse and their weekly Friday night news dump to hide stuff.  Remember the other multiple threads you read or assisted with that dealt with the exact same or very similar topic which can be directly attributed to the same issues.

In this thread,

https://community.netgear.com/t5/Cable-Modems-Routers/CAX80-keeps-rebooting/td-p/2231370/page/2  you can see FURRYe38 respond to kinghq1.  I am not sure if FURRYe38 didnt read kinghq1's post and also ignored all the others discussing and posting detailed information, but the response was lacking at the very least.  I've seen this from FURRYe38 many times, asks a ton of questions, ignores the answers, provides incorrect or scripted answers that have nothing to do with the facts at hand. Frustrating but FURRYe38 isnt a NG employee or forum moderator.  I hope the intent is to help but i've seen rapid fire post reponses with no actual need for the question since it was provided in the OP. I have no idea why anyone would want to up their post count on the NG community board, so I will keep hoping its to help.  Even though furry later posts switching to the CM2000, possibly/probably before the issue presented itself but after the 2.1.3.7 firmware update.

To sum it all up, I beleive it is the 2.1.3.7 firmware, I am 99.9% certain of that (.01% ... I could be wrong, a broken clock is right twice a day).  NG doesnt appear to be responding (appropiately) to the "known" issue as far as I can tell (my CAX80 RMA, what they have said, emailed, and their inadaquate lack of knowledge on NG product alerts). There are multiple community posts and i'm willing to bet a large number of support tickets that are being ignored or at least not tracked or cataloged effectively.  Not everyone lurks the NetGear community board and reads 300+ threads researching this specific issue, not even the mods and NG employees... the customer just wants their product to work or be fixed. I've got to tell you, it is extremely difficult, far beyone what it should be. Just my 2 cents.