NAT of the Outside Source

« ip nat outside » permet de metre en place une translation d’adresse dans le sense Internet vers le Lan

 

  • Inside Local = IP privé d’un host du résau local
  • Inside Global = IP Publique utilisé pour le Nat
  • Outside Local = IP privé de destination
  • Outside Global = IP Publique de destination

IP NAT

Configuration

R4(config)#int fa0/0
R4(config-if)#ip nat inside
R4(config)#int fa0/1
R4(config-if)#ip nat outside

R4(config)#ip nat outside source static 80.80.80.21 213.36.21.10

Vérifications

R4#debug ip nat
IP NAT debugging is on
*Mar 12 17:14:55.443: NAT: s=80.80.80.21->213.36.21.10, d=10.10.0.101 [0]
*Mar 12 17:14:55.467: NAT: s=10.10.0.101, d=213.36.21.10->80.80.80.21 [0]
*Mar 12 17:14:56.451: NAT*: s=80.80.80.21->213.36.21.10, d=10.10.0.101 [0]
*Mar 12 17:14:56.475: NAT: s=10.10.0.101, d=213.36.21.10->80.80.80.21 [0]
*Mar 12 17:14:57.455: NAT*: s=80.80.80.21->213.36.21.10, d=10.10.0.101 [0]
*Mar 12 17:14:57.475: NAT: s=10.10.0.101, d=213.36.21.10->80.80.80.21 [0]
*Mar 12 17:14:58.455: NAT*: s=80.80.80.21->213.36.21.10, d=10.10.0.101 [0]
*Mar 12 17:14:58.479: NAT: s=10.10.0.101, d=213.36.21.10->80.80.80.21 [0]
*Mar 12 17:14:59.455: NAT*: s=80.80.80.21->213.36.21.10, d=10.10.0.101 [0]
*Mar 12 17:14:59.479: NAT: s=10.10.0.101, d=213.36.21.10->80.80.80.21 [0]

R4#show ip nat translations
Pro Inside global      Inside local       Outside local      Outside global
--- ---                ---                213.36.21.10       80.80.80.21
icmp 10.10.0.101:1792  10.10.0.101:1792   213.36.21.10:1792  80.80.80.21:1792
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