Sidebar 1: Router A's Configuration

Current configuration:
!
version 11.2

service password-encryption
no service udp-small-servers
no service tcp-small-servers
!
hostname RouterA
!
enable secret 5 $1Ich$dd4liEbe@$a
enable password 7 053DiCH$3
!
ip subnet-zero
!
interface Ethernet0
 description DMZ Ethernet
 ip address 192.168.1.254 255.255.255.0
ip access-group 102 in
!
interface Serial0
 description Internet Link
 ip address 192.168.2.5 255.255.255.252
 ip access-group 101 in
!
interface Serial1
 no ip address
 shutdown
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.2.6
access-list 101 permit icmp any any
access-list 101 permit tcp any host 192.168.1.2 eq smtp
access-list 101 permit tcp any 192.168.1.0 0.0.0.255 established
access-list 102 permit icmp any any
access-list 102 permit tcp 192.168.1.0 0.0.0.255 any
!

line vty 0 4
 password 7 45433550E141E5D
 login
!
end