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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 declin...
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.