@Cuse165 

If you search the web, you will find people on both sides if DoS is needed or not and to what level. The biggest reason not to seems to be you have already received the packet so your bandwidth is already used. But, do you want it also on the LAN side of the network and can your devices handle it?

My position is to use all security you can till it hurts, then maybe back up a little.

As to which one is causing your problem, it could be any of them. Best to test different settings to see which one.

Also consider if there is a different way to process your data so not to trigger the DoS. It could be something like the router is passing data to the PC faster than the PC can handle and it sees a lot of rejected packets from the PC

@ArcherC8 Thank you I know TP-LINK recommends you turn them off. I tend to agree with you use all security infill it gives you issues.

Thank you