Nftables Chain Priority, My advice : # nft add chain filter input { type filter hook input priority 0\;} Vous noterez la présence du \ pour échapper le ; Le début de la commande est simple, on ajoute une chaine input dans la table # nft add chain family table chain { type type hook hook priority priority \; } type は filter, route, nat のどれかから選ぶことができます。 IPv4/IPv6/Inet アドレスファミリーでは hook は prerouting, input, With this article I'll try to explain Nftables concepts like base chains, priority and address families and put them in relation to the actual network packet flow } chain input2 { type filter hook input priority filter + 2; policy drop; tcp dport 80 log prefix "input2_" # SEEN - chain evaluates # all traffic dropped here by policy including accepted input1 A practical guide to the most useful nftables commands for managing Linux firewalls, including NAT, rules, chains, and tables. 124 accept 0 I'm new to nftables but have used iptables for quite a while now. Learn the fundamentals of nftables, the successor to iptables, including installation, key concepts, basic usage, and how it compares to iptables. For example, a chain on the prerouting hook with the priority -300 will be placed Debian's default configuration file, /etc/nftables. % nft add table nat % nft 'add chain nat postrouting { type nat hook postrouting priority 100 ; }' Change the inet filter forward priority value to a value slightly greater than NF_IP_PRI_FILTER (0), for example 10 to ensure nftables 's forward chain happens after iptables Nous allons maintenant passer à la création des chaines qui permettent de mettre en relation les règles que nous configurerons avec les Hooks NetFilter à nftables (nft) chain priority issues Ask Question Asked 3 years, 10 months ago Modified 3 years, 10 months ago Ufw, iptables or nftables? Which one would you recommend and why? I’m always struggling with this choice. The problem is that this chains are ignored in favor of my default chains (that The definitive guide to nftables — the modern replacement for iptables, ip6tables, arptables, and ebtables. nftables configuration Terms Chain "Priority" When creating chains, you will need to assign a priority. NFTables TPROXY - proxy input and output. I have a debian system as a gateway. So I need a chain with policy of "drop" to drop all outbound packets that do not match approved In Red Hat Enterprise Linux 8 the preferred low level firewall solution is nftables.