Section: Firewalling with nftables and iptables

Enable masquerading

bash
bash
sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
Explanation

Apply source NAT for outbound traffic.

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Show IPv4 filter rules with counters.
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Export iptables rules
Dump current iptables rules in restore format.
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Allow SSH with iptables
Insert a rule allowing inbound SSH.
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Drop traffic from IP
Block all inbound traffic from a source IP.
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Show nftables rules
Display the active nftables ruleset.
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Create an inet filter table.
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