Cisco 1841 configuration

By sirar_hoshyar ·
Dear cisco pro.
i need your help pls.

i have a system that is work just fine it is a dish system with modem and cisco router and a switch and from that switch i connected pc's,,,
everything works fine,,,
now i wanted to put a cisco 1841 router to controll the bandwidth usage to those pc's ,so i put the router 1841 in that main switch by port f0/0 in the router and i connect on pc by cross cable (just to make a test,if it works i'll put a second switch to connect the ovther pc's) i puted that test pc in the other port on the router wich is f0/1 ...
i put a real ip in the f0/0 , and now i can ping it and telnet it from out of my station ,
then i put an to the f0/1
and put the pc ip and gateway
and dns
now i can ping the router from the pc test on both ip's the real one and the pro. one
but i cannot get internet or ping the maincisco router that i'm gettenig internet from ?
this is what i did :

yourname#sh conf
Using 2228 out of 196600 bytes
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
hostname yourname
logging buffered 51200 warnings
no aaa new-model
resource policy
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
ip subnet-zero
ip cef
no ip dhcp use vrf connected
ip domain name
username XXX privilege 15 secret 5 XXX.
interface FastEthernet0/0
ip address #it is real ip#
ip nat outside
duplex auto
speed auto
interface FastEthernet0/1
ip address
ip nat inside
duplex auto
speed auto
ip classless
ip route FastEthernet0/0
ip route #the real ip for my gateway main router#
ip http server
ip http access-class 7
ip http authentication local
ip http timeout-policy idle 60 life 86400 requests 10000
ip nat pool sss prefix-length 24
ip nat inside source list 7 pool sss
access-list 7 permit
access-list 7 permit any any
access-list 23 permit
banner login ^C
Cisco Router and Security Device Manager (SDM) is installed on this device.
This feature requires the one-time use of the username "cisco"
with the password "cisco". The default username and password have a privilege le
vel of 15.

Please change these publicly known initial credentials using SDM or the IOS CLI.

Here are the Cisco IOS commands.

username <myuser> privilege 15 secret 0 <mypassword>
no username cisco

Replace <myuser> and <mypassword> with the username and password you want to use

For more information about SDM please follow the instructions in the QUICK START

GUIDE for your router or go to
line con 0
exec-timeout 0 0
login local
line aux 0
line vty 0 4
exec-timeout 0 0
privilege level 15
password XXX
transport input telnet
line vty 5 15
access-class 23 in
privilege level 15
login local
transport input telnet



where is my fault
please help me
thanx in advance


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