如何在ensp实现该文档要求，详细代码

要在ENSP（Enterprise Network Simulation Platform）中实现《实验4.3 NAT双出口场景配置实验》的要求，需要进行以下步骤。以下是详细的配置代码：

### 拓扑结构
1. **PC1**:
- IP: `10.1.1.学号/24`
- Gateway: `10.1.1.254`

2. **PC2**:
- IP: `10.1.2.1/24`
- IP: `10.1.2.1/24`

4. **防火墙**:
- GE1/0/0: `10.1.1.254/24` (连接PC1)
- GE1/0/1: `10.1.2.254/24` (连接Server1)
- GE1/0/2: `1.1.1.254/24` (ISP1)
- GE1/0/3: `2.2.2.254/24` (ISP2)

### 配置步骤

#### 1. 防火墙基本配置

system-view
sysname FW1

interface GigabitEthernet1/0/0
 ip address 10.1.1.254 255.255.255.0
 exit

interface GigabitEthernet1/0/1
 ip address 10.1.2.254 255.255.255.0
 exit

interface GigabitEthernet1/0/2
 ip address 1.1.1.254 255.255.255.0
 exit

interface GigabitEthernet1/0/3
 ip address 2.2.2.254 255.255.255.0
 exit

#### 2. 配置安全区域

firewall zone trust
 add interface GigabitEthernet1/0/0
 add interface GigabitEthernet1/0/1
 exit

firewall zone AAA_isp1
 add interface GigabitEthernet1/0/2
 set priority 110
 exit

firewall zone AAA_isp2
 add interface GigabitEthernet1/0/3
 set priority 120
 exit

#### 3. 配置安全策略

security-policy
 rule name pc1_to_internet
  source-zone trust
  destination-zone AAA_isp1
  destination-zone AAA_isp2
  source-address 10.1.1.0 mask 255.255.255.0
  action permit
 exit

 rule name internet_to_server
  source-zone AAA_isp1
  source-zone AAA_isp2
  destination-zone dmz
  service ftp
  action permit
 exit

#### 4. 配置NAT策略

nat-policy
 rule name nat_dual_egress
  source-zone trust
  destination-zone AAA_isp1
  destination-zone AAA_isp2
  action source-nat
  egress-interface GigabitEthernet1/0/2
  egress-interface GigabitEthernet1/0/3
  method easy-ip
 exit

#### 5. 配置NAT Server

nat server
 rule name ftp1
  global 1.1.1.254 21
  inside 10.1.2.1 21
  external-interface GigabitEthernet1/0/2
 exit

 rule name ftp2
  global 2.2.2.254 21
  inside 10.1.2.1 21
  external-interface GigabitEthernet1/0/3
 exit

### 测试
#### 1. 内网到外网

// 在PC1上执行
ping 1.1.1.254
ping 2.2.2.254

#### 2. 查看会话表

display firewall session table

#### 3. 外网到内网

// 在防火墙上查看server-map表
display firewall server-map

#### 4. 客户端信息界面

// 在Client1和Client2上使用FTP客户端连接服务器
ftp 1.1.1.254
ftp 2.2.2.254

通过以上步骤，您可以在ENSP中完成《实验4.3 NAT双出口场景配置实验》的所有配置要求。