Hi You can use named sets ( https://wiki.nftables.org/wiki-nftables/index.php/Sets) or a dictionary...(https://wiki.nftables.org/wiki-nftables/index.php/Dictionaries) I think the best would be dictionaries...80) best regards ----- Mensagem original ----- De: "Lars Noodén" <lars.nooden@xxxxxxx> Para: "netfilter" <netfilter@xxxxxxxxxxxxxxx> Enviadas: Quarta-feira, 19 de fevereiro de 2020 4:44:51 Assunto: Automatically maintaining unique list of addresses If I add an IP address multiple times, I end up with it in the ruleset three times. Is there an easy way to try to add IP addresses such that they aren't duplicated? /Lars $ sudo nft add rule ip filter4 input ip \ saddr 198.51.100.209 counter reject $ sudo nft add rule ip filter4 input ip \ saddr 198.51.100.209 counter reject $ sudo nft add rule ip filter4 input ip \ saddr 198.51.100.209 counter reject $ sudo nft list ruleset| grep 51 ip saddr 198.51.100.209 counter packets 0 bytes 0 reject ip saddr 198.51.100.209 counter packets 0 bytes 0 reject ip saddr 198.51.100.209 counter packets 0 bytes 0 reject -- Paulo Ricardo Bruck consultor tel 011 3596-4881 011 98140-9184(TIM/Whats) [ http://www.contatogs.com.br/ | http://www.contatogs.com.br ] gpg AAA59989 at wwwkeys.us.pgp.net skype: suportecontatogs