Команда nft: опции, ключи и примеры использования

nft

Allows configuration of tables, chains and rules provided by the Linux kernel firewall. Nftables replaces iptables.

  • View current configuration:

sudo nft list ruleset

  • Add a new table with family "inet" and table "filter":

sudo nft add table {{inet}} {{filter}}

  • Add a new chain to accept all inbound traffic:

sudo nft add chain {{inet}} {{filter}} {{input}} \{ type {{filter}} hook {{input}} priority {{0}} \; policy {{accept}} \}

  • Add a new rule to accept several TCP ports:

sudo nft add rule {{inet}} {{filter}} {{input}} {{tcp}} {{dport \{ telnet, ssh, http, https \} accept}}

  • Show rule handles:

sudo nft --handle --numeric list chain {{family}} {{table}} {{chain}}

  • Delete a rule:

sudo nft delete rule {{inet}} {{filter}} {{input}} handle {{3}}

  • Save current configuration:

sudo nft list ruleset > {{/etc/nftables.conf}}

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