bash <(curl -fsSL https://gist.github.com/krisstibex/13a4a942b9adb045c4bc770cecca0e25/raw/mac_portforward.sh)

mac_portforward.sh

#!/bin/bash

# 检查 root 权限
if [ "$EUID" -ne 0 ]; then
  echo "请使用 sudo 运行本脚本"
  exit 1
fi

# 默认参数
PROTO="tcp"
IFACE="lo0"
LISTEN_ADDR="127.0.0.1"

# 参数解析
while [[ $# -gt 0 ]]; do
  case "$1" in
    --inport)
      INPORT="$2"
      shift 2
      ;;
    --outport)
      OUTPORT="$2"
      shift 2
      ;;
    --protocol)
      PROTO="$2"
      shift 2
      ;;
    --interface)
      IFACE="$2"
      shift 2
      ;;
    --listen)
      LISTEN_ADDR="$2"
      shift 2
      ;;
    *)
      echo "未知参数: $1"
      exit 1
      ;;
  esac
done

# 参数校验
if [[ -z "$INPORT" || -z "$OUTPORT" ]]; then
  echo "错误：必须指定 --inport 和 --outport"
  exit 1
fi

if [[ "$PROTO" != "tcp" && "$PROTO" != "udp" ]]; then
  echo "协议错误：仅支持 tcp 或 udp"
  exit 1
fi

# 临时 pf 规则文件
TMP_RULES="/tmp/port_forward_rules.conf"
cat > "$TMP_RULES" <<EOF
rdr pass on $IFACE inet proto $PROTO from any to any port $INPORT -> $LISTEN_ADDR port $OUTPORT
EOF

# 启用 pf 并加载规则
pfctl -e 2>/dev/null
pfctl -f "$TMP_RULES"

# 输出状态
echo "-------------------------------------------"
echo "临时端口转发已启用"
echo "监听接口   : $IFACE"
echo "监听端口   : $INPORT"
echo "协议       : $PROTO"
echo "目标地址   : $LISTEN_ADDR:$OUTPORT"
echo "按 Ctrl+C 停止并清除规则"
echo "-------------------------------------------"

# 清理规则
trap 'echo; echo 正在清理规则...; pfctl -F all -f /etc/pf.conf; echo 已清除。' INT
while true; do sleep 1; done

socat.sh

#!/bin/bash

# 默认参数
PROTO="TCP"
INPORT=""
OUTPORT=""
IFACE="lo0"
LISTEN_ADDR="127.0.0.1"

# 参数解析
while [[ $# -gt 0 ]]; do
  case "$1" in
    --inport)
      INPORT="$2"
      shift 2
      ;;
    --outport)
      OUTPORT="$2"
      shift 2
      ;;
    --protocol)
      PROTO="$2"
      shift 2
      ;;
    --interface)
      IFACE="$2"
      shift 2
      ;;
    --listen)
      LISTEN_ADDR="$2"
      shift 2
      ;;
    *)
      echo "未知参数: $1"
      exit 1
      ;;
  esac
done

# 参数校验
if [[ -z "$INPORT" || -z "$OUTPORT" ]]; then
  echo "错误：必须指定 --inport 和 --outport"
  exit 1
fi

# socat 命令
echo "启动端口转发: $PROTO $INPORT -> $LISTEN_ADDR:$OUTPORT"

socat $PROTO-LISTEN:$INPORT,fork,reuseaddr $PROTO:$LISTEN_ADDR:$OUTPORT