!assigning hostname to router
hostname R1
!banner message
banner motd #Unauthorized access to this device is prohibited!#
!
!configuring aaa authentication on the router
aaa new-model
aaa authentication login default local
!
!creating a username for R1 and password as it will need it for authentication to 
!establish a link to R2
username R2 password kelly
!
!setting ssh to use version 2 only
ip ssh version 2
!
!disabling dns lookup
no ip domain-lookup
!
!creating a domain name for ssh. this is used to generate the key
ip domain-name alanR1.com
!
!generating ssh keys
crypto key generate rsa
1024
!
!preventing messages interrupting CLI on console connection
line con 0
logging synchronous
!
! disabling aux connection
line aux 0
transport output ssh
no exec
exec-timeout 0 1
no password
!
!preventing messages interrupting CLI on all vty connections
line vty 0 15
!allowing traffic in the acl
access-class 1 in
logging synchronous
!enabling only ssh on the vty connections
transport input ssh
!
!assigning ip to s0/0/0
interface Serial0/0/0
ip address 10.111.0.10 255.255.255.252
no cdp enable
no shut
!
!configuring this int for NAT as traffic from this Int if from inside the network
ip nat inside
no shut
!
!assigning ip to s0/0/1
interface Serial0/0/1
ip address 10.111.0.18 255.255.255.252
!configuring this int for NAT as traffic from this Int if from inside the network
ip nat inside
!disabling cdp on the int
no cdp enable
no shut
!
!assigning ip to s0/1/0
interface Serial0/1/0
ip address 10.111.0.13 255.255.255.252
!
!changing the encapsulation to PPP and setting authentication on this interface
encapsulation ppp
ppp authentication chap
!configuring this int for NAT as traffic from this Int if from inside the network
ip nat inside
!disabling cdp on the int
no cdp enable
no shut
!
!assigning ip to s0/1/1
interface Serial0/1/1
ip address 196.1.1.42 255.255.255.252
!configuring this int for NAT as traffic from this Int is from outside the network
ip nat outside
!disabling cdp on the int
no cdp enable
no shut
!
!setting up OSPF
router ospf 1
!assigning the router an OSPF ID
router-id 1.1.1.1
!summarising the ospf area
area 0 range 10.111.0.0 255.255.255.0
!adding the networks to advertise
network 10.111.0.8 0.0.0.3 area 0
network 10.111.0.16 0.0.0.3 area 0
network 10.111.0.12 0.0.0.3 area 0
!propagating the default route through the network
default-information originate
!
!configuring nat with the public ip address range
ip nat pool public_access 202.100.37.2 202.100.37.254 netmask 255.255.255.0
!configuring what ip address will be translated with NAT
ip nat inside source list 1 pool public_access
!configuring a static ip on web server
ip nat inside source static 10.111.1.253 202.100.37.1 
!
!default route to ISP
ip route 0.0.0.0 0.0.0.0 Serial0/1/1 
!
!ssh access list only devices from the internal network can ssh into device because !of below acl
access-list 1 permit 10.111.0.0 0.0.255.255
!
!assigning as password and username to the router
username alan secret kelly
!configuring a password on privileged mode
enable secret kelly
!
!end
end
!copy running config to startup config
copy r s