enable
conf t
hostname ISP
enable password cisco
enable secret class
line con 0
password class
login
line vty 0 4
password class
login
exit

in s0
ip address 192.168.1.5 255.255.255.252
clock rate 64000
no shut
encapsulation frame-relay ietf
frame-relay lmi-type ansi
no frame-relay inverse
frame-relay map ip 192.168.1.6 101 ietf broadcast
bandwidth 64
no keepalive
exit

int e0
ip address 10.10.0.1 255.255.0.0 
no shut
exit

ip dhcp pool POOL5
network 10.10.0.0 255.255.0.0
default-router 10.10.0.1
dns-server 10.10.0.5
exit

ip dhcp exclude-address 10.10.0.1 10.10.0.10

ip nat pool public-access 192.168.100.11 192.168.100.20 netmask 255.255.255.0
access-list 1 permit 10.10.0.0 0.0.255.255
ip nat inside source static 10.10.0.1 192.168.100.1
ip nat inside source list 1 pool public-access overload

interface ethernet 0
ip nat inside
interface serial 0
ip nat outside
exit

conf t
ip route 192.168.2.0 255.255.255.252 192.168.1.6
ip route 172.16.4.0 255.255.255.0 192.168.1.6
ip route 172.16.15.0 255.255.255.0 192.168.1.6
exit