diff --git a/03 b/03
new file mode 100644
index 0000000..49d9c58
--- /dev/null
+++ b/03
@@ -0,0 +1,247 @@
+#!/bin/bash
+
+# 颜色定义
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+PURPLE='\033[0;35m'
+CYAN='\033[0;36m'
+NC='\033[0m' # No Color
+
+# 显示标题
+echo -e "${CYAN}"
+echo "================================================"
+echo "           网络连接诊断工具 v2.0"
+echo "================================================"
+echo -e "${NC}"
+
+# 函数：显示帮助信息
+show_help() {
+    echo -e "${YELLOW}使用说明：${NC}"
+    echo "1. 本工具用于测试网络连接和端口状态"
+    echo "2. 支持IP地址和域名测试"
+    echo "3. 可以测试多个端口"
+    echo "4. 包含详细的连接状态分析"
+    echo ""
+}
+
+# 函数：输入IP/域名
+input_target() {
+    while true; do
+        echo -e "${BLUE}请输入要测试的目标IP地址或域名：${NC}"
+        read -p "目标地址: " TARGET
+        
+        if [ -z "$TARGET" ]; then
+            echo -e "${RED}错误：目标地址不能为空！${NC}"
+            continue
+        fi
+        
+        # 简单验证格式
+        if [[ "$TARGET" =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]] || [[ "$TARGET" =~ ^[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ ]]; then
+            break
+        else
+            echo -e "${RED}错误：请输入有效的IP地址或域名！${NC}"
+        fi
+    done
+}
+
+# 函数：输入端口
+input_ports() {
+    echo -e "${BLUE}请输入要测试的端口（多个端口用空格分隔）：${NC}"
+    read -p "端口: " PORTS_INPUT
+    
+    if [ -z "$PORTS_INPUT" ]; then
+        echo -e "${YELLOW}警告：未输入端口，使用默认端口 25555${NC}"
+        PORTS=("25555")
+    else
+        # 将输入的端口转换为数组
+        PORTS=($PORTS_INPUT)
+    fi
+}
+
+# 函数：Ping测试
+ping_test() {
+    echo -e "\n${PURPLE}=== Ping 连通性测试 ===${NC}"
+    echo -e "目标: ${YELLOW}$TARGET${NC}"
+    
+    if ping -c 4 -W 2 "$TARGET" &> /dev/null; then
+        echo -e "${GREEN}✓ Ping 测试成功 - 网络连通正常${NC}"
+        PING_RESULT=$(ping -c 4 -W 2 "$TARGET" | grep -E "packets transmitted|min/avg/max")
+        echo "$PING_RESULT"
+    else
+        echo -e "${RED}✗ Ping 测试失败 - 网络不通${NC}"
+        return 1
+    fi
+}
+
+# 函数：端口扫描测试
+port_scan_test() {
+    local port=$1
+    echo -e "\n${PURPLE}=== 端口 $port 测试 ===${NC}"
+    
+    # 测试1: nc 命令
+    echo -e "${CYAN}[测试1] NC 端口扫描...${NC}"
+    if command -v nc &> /dev/null; then
+        if nc -zv -w 3 "$TARGET" "$port" &> /dev/null; then
+            echo -e "${GREEN}✓ NC 测试 - 端口 $port 开放${NC}"
+        else
+            echo -e "${RED}✗ NC 测试 - 端口 $port 关闭或无法连接${NC}"
+        fi
+    else
+        echo -e "${YELLOW}⚠ NC 命令未安装，跳过此测试${NC}"
+    fi
+    
+    # 测试2: TCP 连接测试
+    echo -e "${CYAN}[测试2] TCP 连接测试...${NC}"
+    if timeout 3 bash -c "echo > /dev/tcp/$TARGET/$port" 2>/dev/null; then
+        echo -e "${GREEN}✓ TCP 测试 - 端口 $port 可连接${NC}"
+    else
+        echo -e "${RED}✗ TCP 测试 - 端口 $port 无法连接${NC}"
+    fi
+    
+    # 测试3: telnet 测试（如果可用）
+    echo -e "${CYAN}[测试3] Telnet 测试...${NC}"
+    if command -v telnet &> /dev/null; then
+        if timeout 3 telnet "$TARGET" "$port" 2>&1 | grep -q "Connected"; then
+            echo -e "${GREEN}✓ Telnet 测试 - 端口 $port 可连接${NC}"
+        else
+            echo -e "${RED}✗ Telnet 测试 - 端口 $port 无法连接${NC}"
+        fi
+    else
+        echo -e "${YELLOW}⚠ Telnet 命令未安装，跳过此测试${NC}"
+    fi
+}
+
+# 函数：DNS解析测试
+dns_test() {
+    echo -e "\n${PURPLE}=== DNS 解析测试 ===${NC}"
+    if [[ "$TARGET" =~ ^[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ ]]; then
+        echo -e "${CYAN}检测到域名，进行DNS解析...${NC}"
+        if nslookup "$TARGET" &> /dev/null; then
+            echo -e "${GREEN}✓ DNS 解析成功${NC}"
+            nslookup "$TARGET" | grep -A 10 "Name:"
+        else
+            echo -e "${RED}✗ DNS 解析失败${NC}"
+        fi
+    else
+        echo -e "${CYAN}检测到IP地址，跳过DNS解析测试${NC}"
+    fi
+}
+
+# 函数：路由跟踪
+trace_route() {
+    echo -e "\n${PURPLE}=== 路由跟踪测试 ===${NC}"
+    echo -e "${YELLOW}是否进行路由跟踪？(y/n, 可能需要较长时间)${NC}"
+    read -p "选择: " DO_TRACE
+    
+    if [[ "$DO_TRACE" == "y" || "$DO_TRACE" == "Y" ]]; then
+        if command -v traceroute &> /dev/null; then
+            echo -e "${CYAN}开始路由跟踪...${NC}"
+            traceroute -m 15 "$TARGET"
+        elif command -v tracepath &> /dev/null; then
+            echo -e "${CYAN}开始路由跟踪 (使用 tracepath)...${NC}"
+            tracepath "$TARGET"
+        else
+            echo -e "${YELLOW}⚠ 路由跟踪命令未安装${NC}"
+        fi
+    fi
+}
+
+# 函数：生成测试报告
+generate_report() {
+    echo -e "\n${PURPLE}=== 测试报告 ===${NC}"
+    echo -e "测试时间: $(date)"
+    echo -e "目标地址: ${YELLOW}$TARGET${NC}"
+    echo -e "测试端口: ${YELLOW}${PORTS[*]}${NC}"
+    
+    # 汇总结果
+    echo -e "\n${CYAN}汇总结果:${NC}"
+    if ping -c 1 -W 2 "$TARGET" &> /dev/null; then
+        echo -e "${GREEN}● 网络连通性: 正常${NC}"
+    else
+        echo -e "${RED}● 网络连通性: 异常${NC}"
+    fi
+    
+    echo -e "● 端口状态:"
+    for port in "${PORTS[@]}"; do
+        if timeout 2 bash -c "echo > /dev/tcp/$TARGET/$port" 2>/dev/null; then
+            echo -e "  端口 $port: ${GREEN}开放${NC}"
+        else
+            echo -e "  端口 $port: ${RED}关闭${NC}"
+        fi
+    done
+}
+
+# 主函数
+main() {
+    # 显示帮助信息
+    show_help
+    
+    # 获取用户输入
+    input_target
+    input_ports
+    
+    echo -e "\n${GREEN}开始网络诊断测试...${NC}"
+    echo -e "目标: ${YELLOW}$TARGET${NC}"
+    echo -e "端口: ${YELLOW}${PORTS[*]}${NC}"
+    echo ""
+    
+    # 执行各项测试
+    dns_test
+    ping_test
+    ping_result=$?
+    
+    # 如果ping不通，询问是否继续
+    if [ $ping_result -ne 0 ]; then
+        echo -e "\n${YELLOW}警告: Ping 测试失败，目标可能无法访问${NC}"
+        echo -e "${YELLOW}是否继续端口测试？(y/n)${NC}"
+        read -p "选择: " CONTINUE
+        if [[ "$CONTINUE" != "y" && "$CONTINUE" != "Y" ]]; then
+            echo -e "${RED}测试终止${NC}"
+            exit 1
+        fi
+    fi
+    
+    # 端口测试
+    for port in "${PORTS[@]}"; do
+        port_scan_test "$port"
+    done
+    
+    # 路由跟踪
+    trace_route
+    
+    # 生成报告
+    generate_report
+    
+    echo -e "\n${GREEN}网络诊断完成！${NC}"
+}
+
+# 检查必要命令
+check_requirements() {
+    local missing=()
+    
+    for cmd in ping nc timeout; do
+        if ! command -v "$cmd" &> /dev/null; then
+            missing+=("$cmd")
+        fi
+    done
+    
+    if [ ${#missing[@]} -gt 0 ]; then
+        echo -e "${RED}错误: 缺少必要的命令: ${missing[*]}${NC}"
+        echo -e "${YELLOW}请安装缺少的命令后重新运行脚本${NC}"
+        exit 1
+    fi
+}
+
+# 脚本入口
+if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
+    show_help
+    exit 0
+fi
+
+# 检查系统要求
+check_requirements
+
+# 运行主程序
+main