Save and restore rules iptables
Persist rules across reboots
iptables-save > /etc/iptables/rules.v4
iptables-restore < /etc/iptables/rules.v4
more iptables
all 10 commands →
Delete a rule by number
iptables -D INPUT 3
Rate-limit connections
iptables -A INPUT -p tcp --dport 22 -m state --state NEW -m limit --limit 3/min --limit-burst 5 -j ACCEPT
nftables: list all rules
nft list ruleset
nftables: add accept rule
nft add rule inet filter input tcp dport 8080 accept
nftables: flush all rules
nft flush ruleset