Nat-In-A-Stick Problem

Hy, I have some problem to configure LAB with NAT-IN-A-STICK This is my schema and configurations:

192.168.100.33 | 10.0.148.154 | 10.0.0148.153

-----------+---+-----------------------+ | +------+--------+ | 192.168.100.2 | | gw .254 | | route add | +---------------+

Nat Router

------------------------ ip subnet-zero ! interface Loopback0 ip address 10.0.1.1 255.255.255.252 ip nat outside ! interface FastEthernet0 ip address 192.168.100.33 255.255.255.0 secondary ip address 10.0.148.154 255.255.255.248 ip nat inside ip policy route-map Nat-loop speed auto ! ip nat pool MyExternal 10.0.148.155 10.0.148.156 prefix-length 29 ip nat inside source list 11 pool MyExternal overload ip classless ip route 0.0.0.0 0.0.0.0 10.0.148.153 ! access-list 11 remark "Usata per comunicare con ExternalRouter" access-list 11 permit 192.168.100.0 0.0.0.255 access-list 102 remark "Usata dalla route-map Nat-loop" access-list 102 permit ip 192.168.100.0 0.0.0.255 any access-list 102 permit ip any 10.0.148.0 0.0.0.255 access-list 177 remark "Per scopo debugging" access-list 177 permit icmp any any route-map Nat-loop permit 10 match ip address 102 set ip next-hop 10.0.1.2 ! ...end

External Router

------------------------ interface Loopback0 ip address 177.10.1.3 255.255.255.0 ! interface Ethernet0 ip address 10.0.148.153 255.255.255.0 ! interface ATM0 ... ! ip classless ip route 0.0.0.0 0.0.0.0 ATM0

Route Statiche sul Pc

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Route attive: Indirizzo rete Mask Gateway Interfaccia Metrica 0.0.0.0 0.0.0.0 192.168.100.254 192.168.100.3 20 10.0.1.0 255.255.255.0 192.168.100.33 192.168.100.3 1 10.0.148.0 255.255.255.0 192.168.100.33 192.168.100.3 1 177.10.1.3 255.255.255.255 192.168.100.33 192.168.100.3 1 Gateway predef.: 192.168.100.254 =========================================================================== Route permanenti: Nessuna

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Dal PC: C:\\Documents and Settings\\Administrator\\Desktop>ping 177.10.1.3

Esecuzione di Ping 177.10.1.3 con 32 byte di dati:

Richiesta scaduta.

Statistiche Ping per 177.10.1.3: Pacchetti: Trasmessi = 1, Ricevuti = 0, Persi = 1 (100% persi), Control-C ^C C:\\Documents and Settings\\Administrator\\Desktop>

Sul Nat Router:

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1w6d: IP: route map Nat-loop, item 10, permit 1w6d: IP: FastEthernet0 to Loopback0 10.0.1.2 1w6d: IP: route map Nat-loop, item 10, permit 1w6d: IP: FastEthernet0 to Loopback0 10.0.1.2 1w6d: IP: s=10.0.148.156 (FastEthernet0), d=177.10.1.3 (Loopback0), g=10.0.1.2,len 60, forward 1w6d: ICMP type=8, code=0 1w6d: IP: tableid=0, s=10.0.148.156 (Loopback0), d=177.10.1.3 (FastEthernet0), routed via RIB 1w6d: IP: s=10.0.148.156 (Loopback0), d=177.10.1.3 (FastEthernet0), g=10.0.148.153, len 60, forward 1w6d: ICMP type=8, code=0 1w6d: IP: route map Nat-loop, item 10, permit 1w6d: IP: FastEthernet0 to Loopback0 10.0.1.2 1w6d: IP: s=10.0.148.156 (FastEthernet0), d=177.10.1.3 (Loopback0), g=10.0.1.2,len 60, forward 1w6d: ICMP type=8, code=0 1w6d: IP: tableid=0, s=10.0.148.156 (Loopback0), d=177.10.1.3 (FastEthernet0), routed via RIB 1w6d: IP: s=10.0.148.156 (Loopback0), d=177.10.1.3 (FastEthernet0), g=10.0.148.153, len 60, forward 1w6d: ICMP type=8, code=0 1w6d: IP: tableid=0, s=177.10.1.3 (FastEthernet0), d=10.0.148.156 (FastEthernet0), routed via RIB 1w6d: IP: s=177.10.1.3 (FastEthernet0), d=10.0.148.156 (FastEthernet0), len 60,rcvd 3 1w6d: ICMP type=0, code=0 1w6d: ICMP: echo reply rcvd, src 177.10.1.3, dst 10.0.148.156

NatRouter#sh ip nat trans Pro Inside global Inside local Outside local Outside global icmp 10.0.148.156:512 192.168.100.3:512 177.10.1.3:512

177.10.1.3:512 NatRouter#

Sull'External Router:

--------------------------------- ExternalRouter#

*Mar 14 11:38:33.247: ICMP: echo reply sent, src 177.10.1.3, dst 10.0.148.156 *Mar 14 11:38:38.627: ICMP: echo reply sent, src 177.10.1.3, dst 10.0.148.156

It seems good the packets from PC to External Router between NAT router but the answer is seems not working fine. Why this?

Thanks Carlo