Netgear router models are RAX45-100NAS and RAX54-100NAS

Hi NetGear Community,

Allen_non here.  I am a competent computer user, mechanical engineer, etc, so I can interact with my routers, but I don’t understand the “deep magic”, ie port forwarding, bridges, channels, etc.  As such, I leave settings as factory default if I don’t know what they do.  I do have all my routers set for MAC filtering to block any devices whose MAC addresses are not recorded in the Approved Device List.

I believe I’m encountering a very similar issue as “So_tired”.

Issue:

After running fine for several years, about 6 weeks ago, my 2 Netgear routers lose internet connection regularly and precisely every Tuesday around 12:25 PM EDT (daylight saving time).  At that time, our NG routers lose internet and have to be rebooted to fix.  I have not waited for extended times to see if they recover on their own, as several family members work from home and need the connection restored pronto.

When I checked the router logs, they show several hundred entries starting around 12:25 PM.  A few sample lines read:

[DoS attack: Fraggle Attack] from source 192.168.1.254,port 67 Tuesday, Aug 05, 2025 11:29:53

[DoS attack: NetBiosReplyDrop] from source 10.0.0.3,port 137 Tuesday, Aug 05, 2025 11:29:47

whereas the vast majority of lines read :

[DoS attack: TCP SYN Flood] from source 192.168.1.254,port 38200 Tuesday, Aug 05, 2025 16:23:37

Set up:

ISP is ATT fiber going to ATT provided router (Arris BGW210).   Arris “feeds” via ethernet my two NetGear routers, RAX45-100NAS  and RAX54-100NAS.  All 3 routers update their firmware automatically, and I recently verified they are all up to date.

I have very little running on the Arris.  It supplies connection to the Netgears.  I can access it via wifi or ethernet for checking settings, etc, but I generally just use it as “gateway”.

Netgear RAX-45 is used for home office, connecting 2 desktops via ethernet, and a couple of laptops via wifi.  Other than that, I keep extraneous devices off this router.

RAX-54 is in our living room and networks all our various devices such as smart switches, thermostats, wifi cameras, phones, etc.

Note:  I have one old Netgear R7000 router that is connected to RAX-45, that connects to our Ooma VOIP box and a 3D printer that is only on when I’m printing.  Even while the RAX-45 seems to lose connectivity, the R7000 seems to maintain its connection.

I have no idea how to fix this, and appreciate any help you all have.  I’d rather not have to buy 2 new routers.  Nothing has materially changed in the last 6 weeks that I can think of.  All routers have been rebooted several times.  I can get you .cfg files and or log files if that will help.  Thanks in advance!

~Allen