Multiple DoS Attacks in Logs!

[regalvoid]

I know there are often false flags in regards to DoS Attacks but networking is outside my area of expertise and I have lost service a few times so I'd rather be safe than sorry.

I have a CAX30S modem/router running firmware V2.1.6.2 and the logs show a large amount of DoS Attacks each day coming from my public IP.  (Attached is a screenshot of a recent batch).  I wouldn't be concerned but the time on the logs is six hours ahead of what the modem is set on and I have briefly lost service twice in the last few weeks. My wifi vanishes (as in it is not listed as an option from any of my devices) but none of the lights on the modem change.

[michaelkenward · Accepted solution]

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@regalvoid wrote:

I know there are often false flags in regards to DoS Attacks but networking is outside my area of expertise and I have lost service a few times so I'd rather be safe than sorry.

First read what @microchip8 says.

Then look into why you have "lost service".

That almost certainly has nothing to do with DoS Attacks.

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My wifi vanishes (as in it is not listed as an option from any of my devices) but none of the lights on the modem change.

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To deal with this symptom, start with the usual troubleshooting. First move, apply the latest firmware to the router bit of your modem router.

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I have a CAX30S modem/router running firmware V2.1.6.2

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That's not a firmware version in Netgear's library for the CAX30S. Maybe they withdrew it.

CAX30S | Cable Modems and Routers | NETGEAR Support

That directs you here:

CAX30 Firmware Version 2.2.1.12 - NETGEAR Support

For more help check the section for your hardware. This place is for routers. You own a "gateway".

Cable Modems & Gateways - NETGEAR Communities

You  might find something useful there.

[microchip8]

I would disable DoS protection entirely. It's useless as-is in its current form. If you were really getting DoS'd, you won't be on the Internet as your device(s) will choke up. Losing connection might actually be from this false DoS protection.

[michaelkenward · Accepted solution]

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@regalvoid wrote:

I know there are often false flags in regards to DoS Attacks but networking is outside my area of expertise and I have lost service a few times so I'd rather be safe than sorry.

First read what @microchip8 says.

Then look into why you have "lost service".

That almost certainly has nothing to do with DoS Attacks.

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My wifi vanishes (as in it is not listed as an option from any of my devices) but none of the lights on the modem change.

---

To deal with this symptom, start with the usual troubleshooting. First move, apply the latest firmware to the router bit of your modem router.

---

I have a CAX30S modem/router running firmware V2.1.6.2

---

That's not a firmware version in Netgear's library for the CAX30S. Maybe they withdrew it.

CAX30S | Cable Modems and Routers | NETGEAR Support

That directs you here:

CAX30 Firmware Version 2.2.1.12 - NETGEAR Support

For more help check the section for your hardware. This place is for routers. You own a "gateway".

Cable Modems & Gateways - NETGEAR Communities

You  might find something useful there.

[regalvoid]

Thank you for your reply! I had the router check for updates itself and it said there wasn't any so I didn't even think to check.

I have applied the firmware update and am hoping that resolves the issue. And if it doesn't, I will visit the Gateway section.

Thanks again!

[FURRYe38]

Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-m...
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-mode...

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@regalvoid wrote:

I know there are often false flags in regards to DoS Attacks but networking is outside my area of expertise and I have lost service a few times so I'd rather be safe than sorry.

I have a CAX30S modem/router running firmware V2.1.6.2 and the logs show a large amount of DoS Attacks each day coming from my public IP.  (Attached is a screenshot of a recent batch).  I wouldn't be concerned but the time on the logs is six hours ahead of what the modem is set on and I have briefly lost service twice in the last few weeks. My wifi vanishes (as in it is not listed as an option from any of my devices) but none of the lights on the modem change.

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[michaelkenward]

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@regalvoid wrote:

Thank you for your reply! I had the router check for updates itself and it said there wasn't any so I didn't even think to check.

You aren't the first, and won't be the last, to hit that "gotcha". That's why "what's the version number?" is a constant refrain around here.