Thanks for the pointed and link. NAT does sound like it might be the solution. I followed that guide and added ip nat inside to the GigabitEthernet0/1 interface and ip nat outside to the Serial0/0/0 interface. Then I added: ip nat pool wan 10.0.0.222 10.0.0.222 prefix-length 24 ip nat inside source list 7 pool wan overload access-list 7 permit 0.0.0.1 192.168.1.254 Which, as I understand, should translates any packets coming from a 192.168.1.x address to show as being from the single 10.0.0.222 address. However, I am still seeing the same problem; no traffic from the attached laptop is getting out of the local network. Is there a way I can test if NAT is working right? EDIT - Both show ip nat translations and show ip nat statistics come up blank/empty, so NAT isn't kicking in for some reason. GigbitEthernet is set as NAT Inside, and Serial as NAT outside, so I'm not sure where the problem is.
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I am setting up a Cisco router for a T1 line for the first time and I have hit a barrier. The router, a 2821 with WIC-1DSU-T1-V2, is online (all statuses are up and I can ping outside sites). However, a laptop connected to the router cannot access the outside Internet. My router's (sanitized) static IP from the ISP is 10.0.0.222. It is on the 10.0.0.220/30 Network, with a broadcast address of 10.0.0.223/30. The ISP's gateway is 10.0.0.221 I have the Gigabit Ethernet port set with an IP of 192.168.1.1/24 Here is the configuration: ! version 12.4 service config service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption no service dhcp ! hostname Router ! boot-start-marker boot-end-marker ! enable secret 5 XXXXXXXX enable password XXXXXX ! no aaa new-model no ip routing ! ! no ip cef ! ! ip name-server 10.0.0.3 ip name-server 10.0.0.4 ! ! ! ! ! interface GigabitEthernet0/0 no ip address no ip route-cache shutdown duplex auto speed auto no cdp enable ! interface GigabitEthernet0/1 ip address 192.168.1.1 255.255.255.0 no ip route-cache duplex auto speed auto no cdp enable no mop enabled ! interface Serial0/0/0 ip address 10.0.0.222 255.255.255.252 encapsulation ppp no ip route-cache no fair-queue ! ip default-gateway 10.0.0.221 ip forward-protocol nd ! ip http server ! ! control-plane ! ! line con 0 exec-timeout 0 0 line aux 0 line vty 0 4 password XXXXXX login ! scheduler allocate 20000 1000 no process cpu extended no process cpu autoprofile hog ! end From the router command line I can ping 10.0.0.221 (ISP gateway) as well as outside IPs. Domain names resolve properly and can be pinged. From my regular Internet connection I can ping the router. However, when I attach a laptop to the GigabitEthernet0/1 (Laptop's static IP is set to 192.168.1.2) I cannot get to the outside network. I can ping the Ethernet card's address and the T1 card's, but not the ISP gateway (10.0.0.221) or any other outside addresses. I have tried setting the Laptop's gateway to nothing, 192.168.1.1 and 10.0.0.222. Setting it to 10.0.0.221 gives a "network unreachable" error. I am new to Cisco routers so I assume it is something simple, maybe a needed IP routing rule or something? In summary: Router is online on T1, can ping and be pinged, but laptop connected to router ethernet cannot access outside network. Thanks for any help.
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