[DoS attack: Fraggle Attack] on RAX20 logs

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.

216.58.199.106 and 74.125.23.108 are Google.

157.240.199.34 is Facebook

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.

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chrisling wrote:

This RAX20 is connecting to an uplink R7000 as a edge router front facing the ISP's modem. 

 

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Sounds messy. Are you running "Double NAT" because you like things that way? Heaven only knows what the  modem is also doing.