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Forum Discussion
Nighthawk R7000 - Network disconnect on all devices when using high bandwidth
Hi everyone, hoping for some help here.
My network disconnects across all devices seemingly during the peak of downloads on a new computer I built. It reaches upwards of 30 MB/s, and slowly declines to zero until complete network disconnect, eventually reconnecting after 2 minutes or so. An example of whats being downloading is a steam game or drivers. This only happens when the download is on this new PC, and not any others from what I can see. Here are some important specs for troubleshooting:
Motherboard: MSI MPG B550I GAMING EDGE MAX WIFI (On new PC that causes issue)
Connected to 5GHz network
Router: Nighthawk R7000 Firmware Version V1.0.11.126_10.2.112
ISP: Spectrum up to 400 Mbps
Fresh install of windows 10 Home, no third party anti-virus software, clean HD's. I checked the router logs, and it showed DoS attacks during the time the network disconnects, example:
"[DoS attack: FIN Scan] (1) attack packets in last 20 sec from ip [13.226.20.215], Thursday, Jul 29,2021 14:40:55
[DHCP IP: (192.168.1.12)] to MAC address 00:71:47:3F:11:73, Thursday, Jul 29,2021 14:40:52"
(The external IP is amazon cloudfront in this case, probably what I'm downloading the games/software from, so I don't believe it's a true DoS)
As far as I can see, all devices on the network disconnect, hardwire connections and wireless (Phone, PC, Alexa, Laptop, TV, ect).
What I've tried:
Disabled Port Scan and DoS Protection in WAN settings on router
Lowered 2.4GHz Speed to 50%, made 5GHz Speed 100% in router
Upgraded Router Firmware
Enabled QoS in Router settings
Rebooted Modem and Router
Updated Windows on new PC
Extra notes:
The speedtest on my new PC (5GHz Wifi) is considerably faster than my hardwired PC with a Cat6 cable. 350Mbps vs 170 Mbps. Could it be I'm being throttled by my ISP because my Network adapter for my new PC is just too fast and pulling so much? I'm stuck, any input is appreciated.
1 Reply
It might also help if you told people what the modem is in front of this router, if there is one. The model number could be useful. Is it, by any chance, also a router, with a set of LAN ports on the back?
The reason for asking is that a lot of people turn up here trying to put a router behind a modem that is also a router. That can complicate troubleshooting.
Maedriz wrote:
Fresh install of windows 10 Home, no third party anti-virus software, clean HD's. I checked the router logs, and it showed DoS attacks during the time the network disconnects, example:
"[DoS attack: FIN Scan] (1) attack packets in last 20 sec from ip [13.226.20.215], Thursday, Jul 29,2021 14:40:55[DHCP IP: (192.168.1.12)] to MAC address 00:71:47:3F:11:73, Thursday, Jul 29,2021 14:40:52"
Netgear's firmware is great at creating false reports of DoS attacks. Many of them are no such thing.
Search - NETGEAR Communities – DoS attacks
Use Whois.net to see who is behind some of them and you may find that they are from places like Facebook, Google, even your ISP.
Here is a useful tool for that task:
IPNetInfo: Retrieve IP Address Information from WHOIS servers
If these events are slowing down your router, that may be because it is using up processor time as it writes the events to your logs. Anything that uses processor power – event logging, QoS management, traffic metering – may cause slowdowns. Disable logging of DoS attacks and see if that reduces the problem. This does not prevent the router from protecting you from the outside world.
