access-list 100 permit ip any any
access-list 100 permit tcp any any
access-list 100 pemirt tcp any any eq 80
access-list 100 pemirt tcp any any eq 443
access-list 100 pemirt tcp any any eq 25
access-list 100 pemirt tcp any any eq 110
access-list 100 pemirt tcp any any eq domain
access-list 100 pemirt udp any any eq domain
access-list 100 permit icmp any any
access-list 100 permit tcp any any eq 21



route-map pating permit 10 
match ip address 100 

ip nat pool dynamic 210.212.10.192-210.212.10.198 255.255.255.248
ip nat inside source list pating dynamic

# then on ur inside router interface 

int fa0/1

ip nat inside 
ip address 10.10.100.2 255.255.255.252

#and on the outside interface 

int fa0/0
ip nat outside 
ip address 

ip route 0.0.0.0 0.0.0.0 fa0/0 (or wan ip of isp)

ip route 10.10.0.0 255.255.0.0 10.10.100.1 (switch interface ip that is connected with router int fa0/1)