diff --git a/README.md b/README.md
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-# 2022年秋季网络安全公共作业仓库
-### 中国传媒大学
-## 实验报告要求
-* Markdown 书写，且在 Github 上渲染出的排版效果正常，可读性强；
-* 在 Github 上每次提交作业单独从 master 分支 新 开一个分支；
-    * 每次作业均保存到 独立不冲突 的子目录；
-* 图文并茂证明：
-    * 实验关键步骤是自己做的；
-    * 哪些 实验结果符合实验要求预期；
-* 如有涉及到代码、配置文件，请记得 commit 源代码 文件；
-* 规范的 Git 工作流程：
-    * 提交作业等待批改：提交 PR 请求将作业分支合并到 master 分支；
-        * 未 PR 时的 commit 不会被批改；
-    * 课程没有在教务处系统上查到分数之前，禁止合并或关闭 已有批改记录的 PR，可以在该 PR 对应的分支上继续提交新变更；；
-    * 每次实验报告只保留一个 Open 状态的 PR ，禁止同一次作业发起多个 PR；
-    * PR 的标题应体现本次实验报告的主题；
\ No newline at end of file
+# chap0x01
+
+------
+auther:milkcandy
+
+------
+
+## 实验目的
+* 掌握 VirtualBox 虚拟机的安装与使用；
+* 掌握 VirtualBox 的虚拟网络类型和按需配置；
+* 掌握 VirtualBox 的虚拟硬盘多重加载；
+
+-----
+
+## 实验环境
+
+* VirtualBox 虚拟机
+* 攻击者主机（Attacker）：kali-linux-2022.3-virtualbox-amd64
+* 网关（Gateway, GW）：Debian Buster
+* 靶机（Victim）：From Sqli to shell / xp-sp3 / Kali
+
+-----
+
+## 实验要求
+
+* 虚拟硬盘配置成多重加载，配置完效果如下图所示；
+![](img/multi_load.png)
+![](img/multi.png)
+</br>
+
+* 搭建满足如下拓扑图所示的虚拟机网络拓扑；
+![](img/network_topology.png)
+</br>
+
+* 配置网络前准备工作
+`管理>主机网络管理器>创建新的hostonly地址>手动分配地址`
+    * 作用：用于ssh登录虚拟机时更好地区分不同主机的网络地址。
+![](img/pre_hostonly.png)
+</br>
+
+* 搭建内部网络配置
+`以Enterprise Network-2为例:`
+    * 此局域网包括三台主机：Debian 10(gateway) | xp-victim-2 | debian-victim-2
+    * 先配置`Debian 10(gateway)`的网络
+    ![](img/enterprise_network-debian-gw.png)
+    * 配置`xp-victim-2`的网络
+    ![](img/enterprise_network-xp_2.png)
+    ![](img/enterprise_network-xp.png)
+    * 配置`debian-victim-2`的网络
+    ![](img/enterprise_network-debian_2.png)
+    ![](img/enterprise_network-debian.png)
+    
+    * 配置好网络后，可以发现虚拟机自动分配好了内网地址，如下图所示：
+`Debian 10(gateway):`
+![](img/debian-gw-ip.png)
+`xp-victim-2：`
+![](img/xp-victim-2-ip.png)
+`debian-victim-2：`
+![](img/debian-victim-2-ip.png)
+* 测试内网连通性：
+    先关闭`xp-victim-2`的防火墙：
+    ![](img/xp-shutdownfirewall.png)
+    * `Debian 10(gateway)`和`xp-victim-2`之间的连通性：
+    ![](img/debian-gw-ping-xp-2.png)
+    ![](img/xp-2-ping-debian-gw.png)
+    * `Debian 10(gateway)`和`debian-victim-2`之间的连通性：
+    ![](img/debian-gw-ping-debian-2.png)
+    ![](img/debian-2-ping-debian-gw.png)
+    * `debian-victim-2`和`xp-victim-2`之间的连通性：
+    ![](img/xp-2-ping-debian-2.png)
+    ![](img/debian-2-ping-xp-2.png)
+    
+
+* 全局网络配置
+    * 设置全局Nat network
+    ![](img/natnetwork.png)
+    * 给debian(gateway)添加Nat
+    ![](img/bebian-gw-nat.png)
+    * 给Kali-Attacker添加Nat
+    ![](img/kali-attacker-nat.png)
+
+* 网络连接测试
+![](img/network_all.png)
+    * 靶机可以直接访问攻击者主机
+    ![](img/debian-2-ping-kali-attacker.png)
+    
+    * 攻击者主机无法直接访问靶机
+    ![](img/kali-attacker-ping-debian-2.png)
+   
+    * 网关可以直接访问攻击者主机和靶机
+    ![](img/debian-gw-ping-others.png)
+    
+    * 靶机的所有对外上下行流量必须经过网关
+    在Debian10(GateWay)上安装tshark
+    ```bash
+    apt install tshark
+    ```
+    * 查看Debian10(GateWay)可检测接口：
+    ![](img/enpos.png)
+    ```bash
+    tshark -i enp0s9
+    #监控intnet1的所有流量
+    tshark -i enp0s10
+    #监控intnet2的所有流量
+    ```
+    ![](img/intnet1.png)
+    ![](img/intnet2.png)
+    * 所有节点均可以访问互联网
+    经测试，所以节点均可ping通www.baidu.com，即所有节点均可访问互联网。
+## 出现的问题
+* PS：ssh连接虚拟机设置
+![](img/ssh_permission_denied.png)
+问题分析：可能是没开通ssh服务
+```bash
+apt update
+apt install ssh
+systemctl restart ssh
+ssh root@192.168.56.113
+#经过上述操作，发现可以成功连接ssh
+```
+![](img/successfully_ssh.png)
+## 参考资料
+[VirtualBox 多重加载](https://expoli.tech/articles/2021/06/07/1623066136894.html)
+
+</br>
+
+[VirtualBox 配置网络](https://www-nakivo-com.translate.goog/blog/virtualbox-network-setting-guide/?_x_tr_sl=en&_x_tr_tl=zh-CN&_x_tr_hl=zh-CN&_x_tr_pto=sc)
+
+</br>
+
+[tshark 使用语法](https://www.wireshark.org/docs/man-pages/tshark.html)
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