NAT ( ) / PAT ( ), DHCP FHRP ( ).
NAT/PAT , , ( ). , , IP-. DHCP , , FHRP.
1

3 . "", . , - - - - , . , NAT / PAT.
, . , IP- . NAT:

, , NAT -, . , , , , , - (, , ICMP-).

-, TCP- 80. , , NAT - + TCP- .

show ip nat translations
, , -. , NAT- - , , , . IP- IP-. ...

show ip nat statistics
- . , . FastEthernet 0/0 inside, FastEthernet 1/0 outside.
NAT(config)#interface fastEthernet 0/0 NAT(config-if)#ip nat inside NAT(config)#interface fastEthernet 1/0 NAT(config-if)#ip nat outside
, , .

- !

NAT. IP- - . IP- - , NAT (FastEthernet 1/0). IP- - - ... !
: , .
2

, ! , -. NAT:
NAT#show ip nat translations
, -. , !

, . . 1. ACL:

, ... , - ACL! :
NAT(config)#no access-list 1 NAT(config)#access-list 1 permit 192.168.12.0 0.0.0.255
ACL , 192.168.12.0/24.

- .

Hits, NAT statistics.

... !
: , , .
DHCP.