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关于NAT的配置实例

2019-11-04 20:25:51
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  *******************************全部采用端口************************
  ISP分配的ip202.99.160.129
  
  interface fastethernet0/0
  ip address 192.168.1.1 255.255.255.0
  duplex auto
  speed auto
  in nat inside
  no shutdown
  
  interface fastethernet0/1
  ip address 192.168.2..1 255.255.255.0
  duplex auto
  speed auto
  in nat outside
  no shutdown
  
  ip nat pool OnlyYou 202.99.160.130 202.99.160.130 netmask 255.255.255.252
  //OnlyYou代表地址池的名称。 2个202.99.160.130是代表只用一个ip做转换后ip.
  access-list 1 permit 192.168.1.0 0.0.0.255
  access-list 1 permit 192.168.2.0 0.0.0.255
  ip nat inside source list1 pool OnlyYou overload
  
  
  
  
  ***********************动态地址转换+端口***********************
  ISP分配的IP 有:202.99.160.130~190 255.255.255.192
  
  Interface fastethernet0/1
  Ip address 192.168.1.1 255.255.255.0
  Ip address 192.168.2.1 255.255.255.0 secondary
  Duplex auto
  Speed auto
  Ip nat inside
  No shutdown
  
  Interface serial 0/0
  Ip address 202.99.160.129 255.255.255.192
  Duplex auto
  Speed auto
  Ip nat outside
  No shutdwon
  
  Ip nat pool OutPort 202.99.160.190 202.99.160.190 netmask 255.255.255.192
  Ip nat pool OutPool 202.99.160.130 202.99.160.190 netmask 255.255.255.192
  Ip nat inside source list1 pool OutPort //192.168.1.0段主机全部转成202.99.160.190
  Ip nat inside source list2 pool OutPool
  //出于访问FTP站点等考虑:192.168.2.0和192.168.3.0段主机全部
  //转成202.99.160.130到202.99.160.189中的所有地址。
  Access-list1 permit 192.168.1.0 0.0.0.255
  Access-list2 permit 192.168.2.0 0.0.0.255
  Access-list2 permit 192.168.3.0 0.0.0.255
  
  
  
  ***********************静态地址转换***********************
  
  
  ISP分配的IP地址是:211.82.220.80~211.82.220.87
  211.82.220.81 255.255.255.248
  要求Intranet上的Web.E-mail.Ftp.Media可以被外部访问.
  Interface fastethernet0/0
  Ip address 192.168.1.1 255.255.255.0
  Duplex auto
  Speed auto
  Ip nat inside
  No shutdown
  
  Interface fastethernet0/1
  Ip address 211.82.220.81 255.255.255.248
  Speed auto
  Duplex auto
  Ip nat outside
  No shutdown
  
  Ip nat pool Outpool 211.82.220.86 211.82.20.86 netmask 255.255.255.248
  Access-list 1 permit 192.168.1.2 0.0.0.255
  Access-list 1 permit 192.168.1.3 0.0.0.255
  Access-list 1 permit 192.168.1.4 0.0.0.255
  Access-list 1 permit 192.168.1.5 0.0.0.255
  Ip nat inside source list1 pool Outpool overload
  Ip nat inside source static 192.168.1.2 211.82.220.82
  Ip nat inside source static 192.168.1.3 211.82.220.83
  Ip nat inside source static 192.168.1.4 211.82.220.84
  Ip nat inside source static 192.168.1.5 211.82.220.85
  
  
  
  
  ******************NAT影射****************************
  假如ISP提供的IP地址比较多还可以,但假如不是的时候(如就两个时),一个用于内网地址转换,另一个用于对外网提供服务.
  ISP提供的内网上网IP
  
  Interface ethernet0
  Ip address 192.168.1.1 255.255.255.0
  Duplex auto
  Speed auto
  Ip nat inside
  No shutdown
  Interface fastethernet0/0
  Ip address 211.82.220.129 255.255.255.248
  Duplex auto
  Speed auto
  Ip nat outside
  No shutdown
  
  Access-list 1 permit 192.168.1.0 0.0.0.255
  Ip nat pool Everybody 211.82.220.130 211.82.220.130 network 255.255.255.252
  Ip nat inside source list1 pool Everybody overload
  Ip nat inside source static tcp 192.168.1.2 80 202.99.220.130 80
  Ip nat inside source static tcp 192.168.1.3 21 202.99.220.130 21
  Ip nat inside source static tcp 192.168.1.4 25 202.99.220.130 25
  Ip nat inside source static tcp 192.168.1.5 110 202.99.220.130 110
  
  
  
  *******************利用地址转换实现负载均衡********************
  ;当有如象腾讯公司似的多服务器时,使用路由器实现负载平衡,可以使它们有平等的访问机会.
  Interface fastethernet0/1
  Ip address 192.168.1.1 255.255.255.0
  Duplex auto
  Speed auto
  Ip nat inside
  No shutdown
  
  Interface fastethernet0/0
  Ip address 202.110.198.81 255.2555.255.248
  Duplex auto
  Speed auto
  Ip nat outside
  Access-list 1 permit 202.110.198.82
  Access-list 2 permit 202.110.198.83
  Access-list 3 permit 192.168.1.0 0.0.0.255
  Ip nat pool Webser 192.168.1.2 192.168.1.3 255.255.255.248 type rotary
  Ip nat pool Ftpser 192.168.1.4 192.168.1.5 255.255.255.248 type rotary
  Ip nat pool normal 202.110.198.84 202.110.198.84 netmask 255.255.255.248
  Ip nat inside destination list 1 pool Webser
  Ip nat inside destination list 2 pool Ftpser


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