Here is a config similar to one that I used on my 806 / cable modem setup:
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Router1
!
enable secret yourenablesecretpasswordhere
!
ip subnet-zero
!
ip dhcp pool DHCP-POOL
import all
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
lease 5
!
ip inspect name myfw cuseeme timeout 3600
ip inspect name myfw ftp timeout 3600
ip inspect name myfw http timeout 3600
ip inspect name myfw rcmd timeout 3600
ip inspect name myfw realaudio timeout 3600
ip inspect name myfw smtp timeout 3600
ip inspect name myfw tftp timeout 30
ip inspect name myfw udp timeout 15
ip inspect name myfw tcp timeout 3600
ip inspect name myfw h323 timeout 3600
!
!
interface Ethernet0
description Inside interface
ip address 192.168.1.1 255.255.255.0
ip nat inside
no ip mroute-cache
no cdp enable
!
interface Ethernet1
description Outside interface.
ip address dhcp client-id Ethernet1
ip access-group 111 in
ip nat outside
ip inspect myfw out
no ip mroute-cache
no cdp enable
!
ip nat inside source route-map traffic interface Ethernet1 overload
ip classless
ip http server
!
!
access-list 50 permit 192.168.1.0 0.0.0.255
access-list 111 deny ip 192.168.1.0 0.0.0.255 any
access-list 111 deny ip 127.0.0.0 0.0.0.255 any
access-list 111 permit icmp any any echo
access-list 111 permit icmp any any echo-reply
access-list 111 permit icmp any any traceroute
access-list 111 permit udp any eq domain any
access-list 111 permit udp any eq bootps any eq bootpc
access-list 111 permit udp any eq bootps any eq bootps
access-list 111 deny ip any any log
no cdp run
!
banner motd ^CNo unauthorized access allowed. All access is monitored!^C
!
line con 0
password somepassword
logging synchronous
login
line vty 0 4
access-class 50 in
password someotherpassword
logging synchronous
login
!
scheduler max-task-time 5000
end
Hope it helps!
