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SecPath防火墙常见flood攻击防范典型配置

2006-09-23 发表
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SecPath防火墙常见flood攻击防范典型配置

 

一、组网需求

SecPath开启syn-flood、icmp-flood和udp-flood的攻击防范,防止对Server的flood攻击。

二、组网图

    软件版本如下:

    SecPath10FVRP 3.40 ESS 1604

三、配置步骤

[Quidway]dis cur                                                                  

#                                                                              

 sysname Quidway                                                                 

#                                                                              

 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           //开启报文全局统计                   

#                                                                               

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                                                               

#                                                                              

acl number 3000                                                                

 rule 1 permit ip source 192.168.1.0 0.0.0.255                                 

#                                                                               

interface Ethernet1/0                                                          

 ip address 10.0.0.254 255.255.0.0                                             

#                                                                               

interface Ethernet2/0                                                          

 speed 10                                                                      

 duplex full                                                                   

 ip address 192.168.1.254 255.255.255.0                                        

#                                                                              

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                 //服务器加入非信任域                                

 set priority 5                                                                

 statistic enable ip inzone                //开启所在域入方向的报文统计                                

#                                                                              

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                                                             

#                                                                              

 firewall defend land                                                           

 firewall defend smurf                                                         

 firewall defend winnuke                                                       

 firewall defend syn-flood enable          //使能syn-flood攻击范                           

 firewall defend icmp-flood enable         //使能imcp-flood攻击防范                 

                                           //设置受保护主机和启用tcp代理

firewall defend syn-flood ip 10.0.0.1 max-rate 100 tcp-proxy                  

 firewall defend icmp-flood ip 10.0.0.1    //设置受保护的主机                           

#                                                                              

user-interface con 0                                                           

user-interface vty 0 4                                                          

 authentication-mode scheme                                                    

#                                                                              

return                                                                          

 

                                  

                                                                         

四、配置关键点

1.在全局下开启报文统计;

2.开启受保护主机所在域的入方向的报文统计;

3.使能相应的flood攻击防范;

4.设置受保护主机。

五、验证结果

在攻击机Attacker192.168.1.1上对10.0.0.1进行syn-floodicmp-flood攻击,防火墙告警。

[Quidway]                                                                         

%Jan1 08:01:06:125 2000 Quidway SEC/5/ATCKDF:atckType(1016)=(6)ICMP-flood;rcvIfNa

me(1023)=Ethernet2/0;srcIPAddr(1017)=192.168.1.1;srcMacAddr(1021)=;destIPAddr(1019)=10.0.0.1;destMacAddr(1022)=;atckSpeed(1047)=1000;atckTime_cn(1048)=20000101080102                                                                          

[Quidway]                                                                         

%Jan1 08:01:36:125 2000 Quidway SEC/5/ATCKDF:atckType(1016)=(5)SYN-flood;rcvIfNam

e(1023)=Ethernet2/0;srcIPAddr(1017)=192.168.1.1;srcMacAddr(1021)=;destIPAddr(1019)=10.0.0.1;destMacAddr(1022)=;atckSpeed(1047)=100;atckTime_cn(1048)=20000101080117                                          

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