CallBack Server
version 11.3 
service timestamps debug uptime 
service timestamps log uptime 
no service password-encryption 
! 
hostname server 
! 
enable password cisco 
! 
username client password 0 cisco 
chat-script cb "" "ATDTT" TIMEOUT 60 CONNECT 
! 
! 
interface Ethernet0 
ip address 192.168.1.201 255.255.255.0 
no keepalive 
! 
interface Serial0 
no ip address 
shutdown 
! 
interface Serial1 
no ip address 
shutdown 
! 
interface Async8 
ip address 10.1.1.2 255.255.255.0 
encapsulation ppp 
dialer in-band 
dialer map ip 10.1.1.1 name client class cb 228 
dialer-group 1 
async mode dedicated 
no peer default ip address 
no cdp enable 
ppp callback accept 
ppp authentication chap 
! 

! 
no ip classless 
ip route 160.4.1.0 255.255.255.0 10.1.1.1 
! 
! 
map-class dialer cb 
dialer callback-server username 
dialer-list 1 protocol ip permit 
! 
line con 0 
line 1 8 
script dialer cb 
login local 
modem InOut 
transport input all 
flowcontrol hardware 
line aux 0 
line vty 0 4 
password cisco 
login 
! 
end 

CallBack Client 
version 11.2 
no service udp-small-servers 
no service tcp-small-servers 
! 
hostname client 
! 
enable secret 5 $1$agg8$blP5tNZMOq0xYXvsO/hGG0 
enable password admin 
! 
username server password 0 cisco 
chat-script cb "" "ATDTT" TIMEOUT 60 CONNECT 
! 
interface Ethernet0 
ip address 160.4.1.98 255.255.255.224 
no keepalive 
! 
interface Serial0 
no ip address 
shutdown 
! 
interface Serial1 
no ip address 
shutdown 
! 
interface Async1 
ip address 10.1.1.1 255.255.255.0 
encapsulation ppp 
async mode dedicated 
dialer in-band 
dialer map ip 10.1.1.2 name server 391 
dialer-group 1 
no cdp enable 
ppp callback request 
ppp authentication chap 
! 
no ip classless 
ip route 192.168.1.0 255.255.255.0 10.1.1.2 
! 
dialer-list 1 protocol ip permit 
! 
line con 0 
line aux 0 
script dialer cb 
login local 
modem InOut 
transport input all 
flowcontrol hardware 
line vty 0 4 
password cisco 
login 
! 
end