@CamT TL;DR If you have a real attack coming from inside your network you are probably legally required to block the devices and investigate, you do not want the liability of this zombie machines...

@CamT So, are this devices buggy or active malicious devices ? You need to either disable this warnings AND fix or block the source devices. It won't just go away.

I believe firmware supporting wireguard has not been released yet. only the controller part of it.

@2Dr Any kind of modern SYN flood (and not what this probably is, a false positive or a misbehaving device) can only be effectively stopped by your ISP. A word of warning, you ISP won't do a damn...

@Kennyx It is unlikely that the Ethernet ports are the source of power..UNLESS there is an old/buggy passive POE device attached somewhere If I were you I'll start checking the electrical...

@Kennyx Your switch is either hardware defective or software bricked.. try tftp recovery and if that fails you need to rma it.