!
hostname BRANCH-RTR1
interface GigabitEthernet0/0
 ip address 10.0.3.1 255.255.255.0
 no shutdown
!
router ospf 2
 network 10.0.3.0 0.0.0.255 area 0
!
access-list 140 permit ip 10.0.3.0 0.0.0.255 any
access-list 140 deny ip any any eq 23
!
end