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iptables1

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Chain一覧

chain mean table
INPUT 入力パケット filter mangle
OUTPUT 出力パケット filter nat mangle
FORWARD 転送するパケット filter
REROUTING 受信時に宛先アドレスを変換 mangle
POSTROUTING 送信時に宛先アドレスを変換 nat

ターゲット一覧

target 使用頻度 意味
ACCEPT ★★★ パケットを許可
DROP ★★★ パケットを拒否
RETURN - チェイン内ルール評価終了
MASQUERADE - 送信元IPとポート番号を書き換える
PREROUTING - 特定ポートにリダイレクト
SNAT - パケットの送信元アドレスを修正
DNAT - パケットの送信先アドレスを修正
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