On Friday, September 29th, 2023 at 06:44, marek <cervajs64@xxxxxxxxx> wrote: > - nft flush set ip filter blackhole > > - nft add element ip filter blackhole { X } (bash for loop) Hi Marek, Do that last step atomically and it should be plenty fast. nft flush set ip filter blackhole nft add element ip filter blackhole {\ 1.0.0.1, \ 1.0.0.2, \ 1.0.0.3, \ 1.1.1.1, \ 1.1.1.2, \ 1.1.1.3, \ 1.193.146.35, \ ... 99.99.99.99, \ } Eric