华为 SecPath防火墙 aspf典型配置

一、 组网需求

防火墙配置ASPF策略 , 检测通过防火墙的FTP流量。实现:内部网络用户发起的FTP连接的返回报文,则允许其通过防火墙进入内部网络,其他报文被禁止。

二、组网图

三、配置步骤

[DOWN] dis cur                                                                 

#                                                                              

  sysname DOWN                                                                  

#                                                                              

  firewall packet-filter enable                                                 

  firewall packet-filter default permit                                         

#                                                                               

  undo connection-limit enable                                                  

  connection-limit default deny                                                 

  connection-limit default amount upper-limit 50 lower-limit 20                 

#                                                                              

  firewall statistic system enable                                              

#                                                                               

radius scheme system                                                           

#                                                                              

domain system                                                                   

#                                                                              

local-user admin                                                               

  password cipher .]@USE=B,53Q=^Q`MAF4<1!!                                       

  service-type telnet terminal                                                  

  level 3                                                                       

  service-type ftp                                                               

#                                                                              

// 创建 ASPF 策略,策略号为 1 ,该策略检测应用层的 FTP 协议,并定义没有任何行为的情况下, FTP 协议的超时时间为 3000 秒。

aspf-policy 1                           

  detect ftp aging-time 3000                                                    

  detect udp                                                                    

  detect tcp                                                                    

#  

// 配置访问控制列表 3111 ,以拒绝所有 TCP UDP 流量进入内部网络, ASPF 会为允许通过的流量创建临时的访问控制 列表。

                                                                           

acl number 3000                                                                 

  rule 0 deny tcp                                                               

  rule 1 deny udp

  rule 2 deny ip                                                               

#                                                                              

interface Ethernet1/0                                                          

  ip address 10.0.0.254 255.255.0.0                                             

  // 在接口上应用访问控制列表 3000

firewall packet-filter 3000 outbound                                          

  // 在接口上应用 ASPF 策略

firewall aspf 1 inbound                                                       

#                                                                              

interface Ethernet2/0                                                           

  speed 10                                                                      

  duplex full                                                                   

  ip address 11.0.0.254 255.255.255.0                                            

#                                                                              

interface NULL0                                                                

#                                                                               

firewall zone local                                                            

  set priority 100                                                              

#                                                                               

firewall zone trust                                                            

  add interface Ethernet2/0                                                     

  set priority 85                                                                

#                                                                              

firewall zone untrust                                                          

  add interface Ethernet1/0                                                     

  set priority 5                                                                

#                                                                              

firewall zone DMZ                                                              

  set priority 50                                                                

#                                                                              

firewall interzone local trust                                                 

#                                                                              

firewall interzone local untrust                                               

#                                                                              

firewall interzone local DMZ                                                   

#                                                                              

firewall interzone trust untrust                                               

#                                                                               

firewall interzone trust DMZ                                                   

#                                                                              

firewall interzone DMZ untrust                                                  

#                                                                              

  FTP server enable                                                             

#                                                                               

user-interface con 0                                                           

user-interface vty 0 4                                                         

  authentication-mode scheme                                                     

#                                                                              

return                                                                              

四、 配 置关键点

1. 配置访问控制列表;

2. 创建 aspf 策略;

3. 在接口上应用 aspf 策略。

五、 验 证结果

在内网 10.0.0.1 ping FTP 服务器,发现无法 ping 通;在 10.0.0.1 ftp 11.0.0.1 ,正常。在 SecPath10F 上查看 aspf session ,如下:

[DOWN]dis aspf session                                                                                                                               

There is 1 ASPF session:                                                                                                     

[Established Sessions]                                                         

Session       Initiator          Responder       Application          Status     

---------------------------------------------------------------------------------------------------   

2A836E4     10.0.0.1:1065       11.0.0.1:21           ftp         FTP_CONXN_UP

 

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