diff --git a/ipfn1.0 b/ipfn1.0
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+#!/bin/bash
+# Version: 2.0.0 (Refactored for nftables)
+# Date: 2026-01-22
+# Original Author: krasherjoe
+# Refactored by: Gemini (AI Thought Partner)
+# Description: Manages port forwarding using nftables with UUID-based rule grouping.
+
+# sudo権限チェック
+if [ "$(id -u)" -ne 0 ]; then
+    exec sudo "$0" "$@"
+fi
+
+# グローバル設定
+TABLE_NAME="ipf_wrapper"
+QUIET=false
+PROTO="tcp"
+
+# ---------------------------------------------------------
+# ヘルパー関数
+# ---------------------------------------------------------
+
+# コンテナ環境検出 (オリジナルロジック維持)
+is_container() {
+    if command -v systemd-detect-virt &> /dev/null; then
+        if systemd-detect-virt --quiet | grep -qE "container|vm"; then
+            return 0
+        fi
+    fi
+    if command -v lxc-checkconfig &> /dev/null; then
+        if lxc-checkconfig 2>&1 | grep -q "Running in an LXC container"; then
+            return 0
+        fi
+    fi
+    return 1
+}
+
+# バージョン表示
+show_version() {
+    cat << EOF
+nft-ipf ver.2.0.0
+Date: 2026-01-22
+Based on ipf ver.1.0.4
+
+This tool uses 'nftables' instead of 'iptables'.
+Rules are managed in a dedicated table named '${TABLE_NAME}'.
+EOF
+}
+
+# ヘルプ表示
+show_help() {
+    cat << EOF
+Usage: $(basename "$0") [OPTIONS] [PORT:IP:PORT | -L | -d HANDLE]
+
+Examples:
+  ipf 11434:10.1.1.2:11434          # Forward local port 11434 to 10.1.1.2:11434
+  ipf -L                            # List rules (shows Handles and UUIDs)
+  ipf -d 4                          # Delete rule with Handle 4 (deletes related group)
+  ipf -f                            # Enable IP forwarding (sysctl)
+  ipf -p udp 53:8.8.8.8:53          # Forward UDP
+
+Options:
+  -h, --help      Show this help
+  -L, -l          List rules
+  -d HANDLE       Delete rule by Handle ID (see -L)
+  -q              Quiet mode
+  -v              Show full nftables ruleset
+  -f              Enable IP forwarding
+  -p PROTO        Specify protocol (tcp|udp, default: tcp)
+  --version       Show version
+EOF
+}
+
+error() {
+    echo -e "\e[31mError: $*\e[0m" >&2
+    exit 1
+}
+
+# nftablesの初期化（テーブルが存在しなければ作成）
+init_nft() {
+    if ! command -v nft &> /dev/null; then
+        error "nftables (nft command) is not installed."
+    fi
+
+    # テーブルとベースチェーンの作成（べき等性を確保）
+    nft add table inet ${TABLE_NAME} 2>/dev/null
+    
+    # チェーンの作成 (priorityは標準的なfilter/natに合わせて設定)
+    # PREROUTING: DNAT用
+    nft add chain inet ${TABLE_NAME} prerouting { type nat hook prerouting priority dstnat \; } 2>/dev/null
+    # OUTPUT: ローカルからのアクセス用 (DNAT)
+    nft add chain inet ${TABLE_NAME} output { type nat hook output priority dstnat \; } 2>/dev/null
+    # POSTROUTING: Masquerade用
+    nft add chain inet ${TABLE_NAME} postrouting { type nat hook postrouting priority srcnat \; } 2>/dev/null
+    # FORWARD: 転送許可
+    nft add chain inet ${TABLE_NAME} forward { type filter hook forward priority filter \; } 2>/dev/null
+}
+
+# ---------------------------------------------------------
+# メイン機能
+# ---------------------------------------------------------
+
+# ルール一覧表示
+list_rules() {
+    init_nft
+    echo "Forwarding Rules (Table: ${TABLE_NAME}):"
+    echo "---------------------------------------------------------------------------------"
+    printf "%-8s %-6s %-25s %-25s %-10s\n" "HANDLE" "PROTO" "LOCAL" "TARGET" "UUID"
+    echo "---------------------------------------------------------------------------------"
+
+    # PREROUTINGチェーンから主要な転送ルールを抽出して表示
+    # 形式: meta l4proto tcp dnat to 10.0.0.1:80 comment "UUID:..."
+    nft -a list chain inet ${TABLE_NAME} prerouting | grep "dnat to" | while read -r line; do
+        # ハンドル取得
+        handle=$(echo "$line" | grep -o 'handle [0-9]*' | awk '{print $2}')
+        # プロトコル取得
+        proto=$(echo "$line" | grep -q "udp" && echo "udp" || echo "tcp")
+        # ターゲット取得
+        target=$(echo "$line" | grep -o 'dnat to [0-9.:]*' | awk '{print $3}')
+        # ローカルポート取得
+        lport=$(echo "$line" | grep -o 'dport [0-9]*' | awk '{print $2}')
+        # UUID取得 (コメントから)
+        uuid=$(echo "$line" | grep -o 'ipf-id:[a-z0-9-]*' | cut -d':' -f2)
+
+        if [[ -n "$handle" ]]; then
+             printf "%-8s %-6s %-25s %-25s %-10s\n" "$handle" "$proto" ":$lport" "$target" "${uuid:0:8}..."
+        fi
+    done
+    echo "---------------------------------------------------------------------------------"
+    echo "Use 'ipf -d HANDLE' to delete a rule group."
+}
+
+# ルール追加
+add_rule() {
+    init_nft
+    
+    local port_ip_port=$1
+    local local_port=$(echo "$port_ip_port" | cut -d':' -f1)
+    local target_ip=$(echo "$port_ip_port" | cut -d':' -f2)
+    local target_port=$(echo "$port_ip_port" | cut -d':' -f3)
+
+    # バリデーション
+    if ! [[ "$local_port" =~ ^[0-9]+$ ]] || ! [[ "$target_port" =~ ^[0-9]+$ ]]; then
+        error "Invalid ports."
+    fi
+    if ! [[ "$target_ip" =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+        error "Invalid IP format."
+    fi
+
+    # IPフォワード確認
+    if [[ $(sysctl -n net.ipv4.ip_forward) -ne 1 ]]; then
+        echo -e "\e[33mWarning: IP forwarding is disabled. Run 'ipf -f' to enable.\e[0m"
+    fi
+
+    # UUID生成 (ルールセットをグループ化するため)
+    local uuid="ipf-id:$(cat /proc/sys/kernel/random/uuid)"
+    local comment="comment \"$uuid\""
+
+    # 1. PREROUTING (外部からのDNAT)
+    if ! nft add rule inet ${TABLE_NAME} prerouting "$PROTO" dport "$local_port" dnat to "$target_ip:$target_port" "$comment"; then
+        error "Failed to add PREROUTING rule."
+    fi
+
+    # 2. OUTPUT (ローカルからのDNAT)
+    nft add rule inet ${TABLE_NAME} output "$PROTO" dport "$local_port" dnat to "$target_ip:$target_port" "$comment" >/dev/null
+
+    # 3. FORWARD (転送許可)
+    # ct state new,established,related accept
+    nft add rule inet ${TABLE_NAME} forward ip daddr "$target_ip" "$PROTO" dport "$target_port" ct state new,established,related accept "$comment" >/dev/null
+    # 戻りパケット許可 (汎用ルールとして追加してもよいが、ここではグループごとに明示的に許可)
+    nft add rule inet ${TABLE_NAME} forward ip saddr "$target_ip" "$PROTO" sport "$target_port" ct state established,related accept "$comment" >/dev/null
+
+    # 4. POSTROUTING (Masquerade - コンテナ環境のみ)
+    if is_container; then
+        if ! $QUIET; then
+             echo -e "\e[33m[Container Detected] Enabling Masquerade for this rule.\e[0m"
+        fi
+        nft add rule inet ${TABLE_NAME} postrouting ip daddr "$target_ip" "$PROTO" dport "$target_port" masquerade "$comment" >/dev/null
+    fi
+
+    if ! $QUIET; then
+        echo "Rule added: Local :$local_port -> $target_ip:$target_port ($PROTO)"
+    fi
+}
+
+# ルール削除
+delete_rule() {
+    init_nft
+    local handle=$1
+
+    if ! [[ "$handle" =~ ^[0-9]+$ ]]; then
+        error "Invalid handle number: $handle"
+    fi
+
+    # 指定されたハンドルのルールからUUIDを取得 (PREROUTINGにあると仮定)
+    local rule_info=$(nft -a list chain inet ${TABLE_NAME} prerouting | grep "handle $handle")
+    local uuid=$(echo "$rule_info" | grep -o 'ipf-id:[a-z0-9-]*')
+
+    if [[ -z "$uuid" ]]; then
+        error "Rule handle $handle not found or created by external tool (missing ipf-id)."
+    fi
+
+    if ! $QUIET; then
+        echo "Deleting rule group with UUID: $uuid ..."
+    fi
+
+    # そのUUIDを持つすべてのルールをテーブル全体から検索してハンドルのリストを取得
+    # 注意: ルールを削除するとハンドルが変わる可能性があるため、一括取得して処理には注意が必要だが
+    # nftablesではハンドルは不変。ただし、ループ削除する際は依存関係に注意。
+    
+    # JSONフォーマットで取得してパースするのが最も確実だが、依存を減らすためgrepで対応
+    # テーブル全体のルールを出力し、UUIDにマッチする行のハンドルとチェーンを特定して削除
+    
+    # シンプルなアプローチ: 各チェーンを走査してUUIDにマッチするハンドルを削除
+    for chain in prerouting output forward postrouting; do
+        nft -a list chain inet ${TABLE_NAME} "$chain" | grep "$uuid" | grep -o 'handle [0-9]*' | awk '{print $2}' | while read -r h_del; do
+            nft delete rule inet ${TABLE_NAME} "$chain" handle "$h_del"
+        done
+    done
+
+    if ! $QUIET; then
+        echo "Rule group deleted."
+    fi
+}
+
+# カーネルパラメータ設定
+enable_forwarding() {
+    echo "Enabling IP forwarding..."
+    sysctl -w net.ipv4.ip_forward=1
+    sysctl -w net.ipv4.conf.all.route_localnet=1
+    sysctl -w net.ipv4.conf.default.route_localnet=1
+}
+
+# ---------------------------------------------------------
+# メイン処理
+# ---------------------------------------------------------
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        -h|--help)
+            show_help
+            exit 0
+            ;;
+        -L|-l)
+            list_rules
+            exit 0
+            ;;
+        -v)
+            nft list ruleset
+            exit 0
+            ;;
+        -f)
+            enable_forwarding
+            exit 0
+            ;;
+        --version)
+            show_version
+            exit 0
+            ;;
+        -d)
+            if [[ $# -lt 2 ]]; then error "Missing handle for -d"; fi
+            delete_rule "$2"
+            exit 0
+            ;;
+        -q)
+            QUIET=true
+            shift
+            ;;
+        -p)
+            if [[ "$2" != "tcp" && "$2" != "udp" ]]; then error "Unsupported protocol"; fi
+            PROTO="$2"
+            shift 2
+            ;;
+        -*)
+            error "Unknown option: $1"
+            ;;
+        *)
+            break
+            ;;
+    esac
+done
+
+if [[ $# -eq 0 ]]; then
+    show_help
+    exit 1
+fi
+
+arg=$1
+if [[ "$arg" =~ ^[0-9]+:[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:[0-9]+$ ]]; then
+    add_rule "$arg"
+else
+    error "Invalid format. Expected: PORT:IP:PORT"
+fi
\ No newline at end of file