84 lines
2.1 KiB
Bash
84 lines
2.1 KiB
Bash
#!/bin/bash
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# SSH反向隧道自动重连脚本
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# 配置参数
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REMOTE_HOST="123.56.98.4"
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REMOTE_USER="root"
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REMOTE_PORT=22
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TUNNEL_PORT=2222
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LOCAL_PORT=22
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CHECK_INTERVAL=60 # 检查间隔（秒）
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echo "=== SSH反向隧道自动重连脚本 ==="
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echo "远程服务器: ${REMOTE_USER}@${REMOTE_HOST}:${REMOTE_PORT}"
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echo "隧道端口: ${TUNNEL_PORT} -> localhost:${LOCAL_PORT}"
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echo "检查间隔: ${CHECK_INTERVAL}秒"
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echo ""
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# 检查SSH是否安装
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if ! command -v ssh &> /dev/null; then
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echo "错误: SSH客户端未安装，请先运行 ssh_tunnel_setup.sh"
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exit 1
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fi
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# 函数：建立SSH隧道
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establish_tunnel() {
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] 建立SSH反向隧道..."
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# 先检查是否已有连接
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PID=$(pgrep -f "ssh.*-R.*${TUNNEL_PORT}:localhost:${LOCAL_PORT}.*${REMOTE_USER}@${REMOTE_HOST}")
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if [ ! -z "$PID" ]; then
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echo "发现已有隧道进程 (PID: $PID)，先关闭..."
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kill $PID 2>/dev/null
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sleep 2
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fi
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# 建立新连接
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ssh -fN -R ${TUNNEL_PORT}:localhost:${LOCAL_PORT} \
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-o ServerAliveInterval=30 \
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-o ServerAliveCountMax=3 \
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-o ExitOnForwardFailure=yes \
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-o StrictHostKeyChecking=no \
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-p ${REMOTE_PORT} \
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${REMOTE_USER}@${REMOTE_HOST}
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if [ $? -eq 0 ]; then
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] ✓ 隧道建立成功"
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return 0
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else
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] ✗ 隧道建立失败"
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return 1
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fi
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}
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# 函数：检查隧道是否存活
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check_tunnel() {
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PID=$(pgrep -f "ssh.*-R.*${TUNNEL_PORT}:localhost:${LOCAL_PORT}.*${REMOTE_USER}@${REMOTE_HOST}")
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if [ ! -z "$PID" ]; then
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# 检查进程是否真的在运行
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if ps -p $PID > /dev/null 2>&1; then
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return 0
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fi
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fi
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return 1
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}
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# 主循环
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echo "开始监控SSH隧道..."
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establish_tunnel
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while true; do
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sleep ${CHECK_INTERVAL}
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if ! check_tunnel; then
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] ⚠ 检测到隧道断开，重新连接..."
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establish_tunnel
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else
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] ✓ 隧道连接正常"
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fi
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done
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