Configuring NAT overload

[castel5]

I am new to Cisco and would like help configuring NAT overload on a 805 router.This is a small office to ISP configuration.

Lets say our ethernet address is 10.138.165.2 and the ISP provided serial address is 172.16.10.64. How would I setup the NAT pool? Can you give a nat inside and putside configuration that will work.



Thanks.

Cas.

 

[bobthecat]

Hi Cas, I am also looking into doing some NAT, although Im not quite up to speed yet there is a good intro on:

http://www.cisco.com/warp/public/556/12.html

Bob ^^

 

[Russky]

HI,

Try and integrate this into your config, off the top of my head, it should work OK. Access List 1 dictates which IP addresses will be allowed through the translation.

I am also assuming the Class (A and B) Network masks are used, but your ISP has probably given you a subnetted address.

-------------------------------
interface FastEthernet0/0
ip address 10.138.165.2 255.0.0.0
ip nat inside
!
interface Serial0/0
ip address 172.16.10.64 255.255.0.0
ip nat outside
!
ip nat pool Router-natpool-1 172.16.10.64 172.16.10.64 netmask 255.255.0.0
ip nat inside source list 1 pool Router-natpool-1 overload
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.*.*<Next Hop/Gateway(Info Provided by ISP)>
!
access-list 1 permit 10.0.0.0 0.0.0.255
-----------------------------

Hope this is OK,

Russky - CCNA

 

[jeter]

lets make sure that this is correct.

your lan is 10.138.65.2 and your WAN is say 208.13.125.5

are you saying that you want this private ip to use this
wan ip always using NAT.

ip nat inside source static 10.138.65.2 208.13.125.5

serial interface = ip nat outside
ethernet= ip nat inside Jeter@LasVegas.com
J.Fisher CCNA