Mac ssh连接无操作自动断开异常

# 追加ssh配置，解释见后文
cat <<EOF | sudo tee  -a ~/.ssh/config
Host *
    ServerAliveInterval 30
    ServerAliveCountMax 3
    TCPKeepAlive yes
EOF

• ServerAliveInterval 30：每 30 秒发送一次心跳包
• ServerAliveCountMax 3：连续 3 次无响应则断开重连
• TCPKeepAlive yes：启用 TCP 层 keepalive