LAN users access the Internet through ddnleased lines

Service timestamps debug uptime
Service timestamps log uptime
Service password-encryption
No service tcp-small-servers
No service udp-small-servers
!
Hostname <name of your vro>
!
Enable password <password used to enter privileged mode>
!
No ip name-server
!
Ip subnet-zero
No ip domain-lookup
Ip routing
!
Interface Ethernet 0
No shutdown
Description connected to EthernetLAN
Ip address <Ethernet port ip address and subnet mask>
Ip nat inside
Keepalive 10
!
Interface Serial 0
No shutdown
Description connected to Internet
Ip address <wide area network port ip address and subnet mask>
Ip nat outside
Encapsulation hdlc
!
! Access Control List 1
!
No access-list 1
Access-list 1 permit <Intranet CIDR block address and subnet mask anti-code>
!
! Dynamic NAT
!
Ip nat translation timeout 86400
Ip nat translation tcp-timeout 86400
Ip nat translation udp-timeout 300
Ip nat translation dns-timeout 60
Ip nat translation finrst-timeout 60
Ip nat pool <external address pool Name> <external address pool range> netmask <external Address Mask>
Ip nat inside source list 1 pool <external address pool Name> overload
!
Router rip
Version 2
Network <Intranet CIDR block address>
Passive-interface Serial 0
No auto-summary
!
!
Ip classless
!
! IP Static Routes
Ip route 0.0.0.0 0.0.0.0 Serial 0
No ip http server
Snmp-server community public RO
No snmp-server location
No snmp-server contact
!
Line console 0
Exec-timeout 0 0
Password <password required for logging on from the Console port to user mode>
Login
!
Line vty 0 4
Password
Login
!
End