nat地址轉換

地址轉換（NAT）

對這個配置有問題能夠跟帖

******************************* 所有采用端口 ************************
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表明地址池的名稱。 2個202.99.160.130是表明只用一個ip作轉換後 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




***********************動態地址轉換+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段主機所有轉成 202.99.160.190
Ip nat inside source list2 pool OutPool
//出於訪問ftp站點等考慮：192.168.2.0和192.168.3.0段主機所有
// 轉成202.99.160.130到202.99.160.189中的全部地址。
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



*********************** 靜態地址轉換 ***********************


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能夠被外部訪問 .
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 ****************************
若是ISP提供的IP地址比較多還能夠,但若是不是的時候(如就兩個時),一個用於內網地址轉換,另外一個用於對外網提供服務 .
ISP提供的內網上網 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



*******************利用地址轉換實現負載均衡 ********************
;當有如象騰訊公司似的多服務器時,使用路由器實現負載平衡,可使它們有平等的訪問機會 .Interface fastethernet0/1 Ip address 192.168.1.1 255.255.255.0Duplex autoSpeed autoIp nat inside No shutdownInterface fastethernet0/0Ip address 202.110.198.81 255.2555.255.248Duplex autoSpeed autoIp nat outsideAccess-list 1 permit 202.110.198.82Access-list 2 permit 202.110.198.83Access-list 3 permit 192.168.1.0 0.0.0.255Ip nat pool Webser 192.168.1.2 192.168.1.3 255.255.255.248 type rotaryIp nat pool Ftpser 192.168.1.4 192.168.1.5 255.255.255.248 type rotaryIp nat pool normal 202.110.198.84 202.110.198.84 netmask 255.255.255.248Ip nat inside destination list 1 pool Webser Ip nat inside destination list 2 pool Ftpser