复习
静态路由:应用静态路由 iP route +网络段+子网掩码+下一跳地址
 
Ospf:router ospf1--
router-id 1.0.0.0-- network 10.0.1.0 0.0.0.31 area 0
 
单臂路由+dhcp中继+地址池:router0   in f0/0.1 ip
helper-address 172.16.3.1
                                    in f0/0.2
ip helper-address 172.16.3.1
router1 
(in f0/0.1)ip router 172.16.1.0 255.255.255.0 172.16.3.2
        
(in f0/0.1) ip router 172.16.2.0 255.255.255.0 172.16.3.2
ip dhcp pool server0   default-router  172.16.1.1  
network 172.16.1.0 255.255.255.0   
ip dhcp excluded-address 保留的地址
               
地址池:路由器:ip dhcp pool servA    
       
default-router 172.16.1.1   
       
network 172.16.1.0 255.255.255.0
 
全局  ip dhcp excluded-address
172.16.1.1 172.16.1.99
     
ip dhcp excluded-address 172.16.1.121 172.16.1.254
     
ip dhcp excluded-address 172.16.1.110 172.16.1.110
 
 
2、配置合适的ACL,满足以下要求:
   (1)PC0能ping通PC1,但不能访问PC1发布的FTP服务;
   (2)PC0不能ping通PC2,但能访问PC2发布的Web服务。
(1)ip access-list ex 100    deny (tcp端口,IP不是端口) host
172.16.0.2(源地) host 172.16.1.2 ()目标地址)eq ftp   permit ip any
any   in f1/0   ip access-group 100 out  
(2)接(1)no permit ip
any any   deny icmp, host 172.16.0.2 host
172.16.1.3  permit ip any any
permit ip any any
 
 
pc0不能访问pc2  则pc0为源,pc2为目标
ip access-list standard 1-99  为标准控制列表
ip access-list extanded 100-199 为扩展控制列表
ACL离目标最近用OUT
ACL 离源最近用    IN
(端口:FTP
21,DNS 53,POP3 110,WWW 80,SMTP 25,TELNET 23)