[lxchase]

Nothing, if your self hosting in your home. Volumetric floods will saturate your ISP link.

If you’re hosting with a provider, your maximum factor will be how much your provider will “tank” for you.

Otherwise harden your ports, drop anything via IPTables, turn on NOTRACK. Better but more advanced would be to use tc (traffic control) to drop bad packets before they enter the net filter lifecycle