部分宽带ip无法访问外网，这是运营商的问题，自动检测并重启宽带

#!/bin/sh

# Script to check connectivity and restart network if condition met
# Ping www.baidu.com 3 times successfully but 8.8.8.8 fails 3 times

# Function to check if ping succeeds (returns 0 if at least one packet received)
ping_check() {
    ping -c 10 -W 5 "$1" >/dev/null 2>&1
    return $?
}

# Check www.baidu.com
if ping_check "www.baidu.com"; then
    # If baidu succeeds, check 8.8.8.8
    if ! ping_check "8.8.8.8"; then
        # Condition met: restart network interface (assuming wan, adjust if needed)
        logger "Network restarted due to baidu ping success but 8.8.8.8 failure"
        /etc/init.d/network restart
    fi
fi