which client you use?

Did not have issues on #Damus

Snort is working fine on my end.

What kind of malfunctioning are you seeing?

One can't really attack a protocol; but, one could DDoS several Nostr relays instead. Or, too many clients are connected and overloading them?

But hey, that actually is a strength of Nostr; should the relays you used before no longer work, just add new ones!