Re: PortForwarding on Cisco

[Richard Mikisa <rmikisa at mail.one2netmail.co.ug>]

Thanx,
However, if the ip on the BRI0/0  is another private IP (when the router makes 
the ISDN connection to the ISP, it's assigned a private IP,something like 
172.16.0.8), will this NAT rule still work.
One other thing, there is no serial connection. just the BRI0/0 and its 
attributes. 

On Monday 05 May 2003 12:04, Mark Tinka wrote:
> You use NAT.
>
> Say you have a mail server seated on your private 192.168.0.0 network; and
> this is your subnetted network:
>
> 192.168.0.1 - internal ethernet interface on router configured for "ip nat
> inside".
>
> 192.168.0.2 - mail server
>
> 192.168.0.3 - .254 - rest of your network
>
> x.x.x.x - public IP address on your serial or ISDN connection
>
> First, setup your NAT:
>
> conf t
>  int e0
>   ip address 192.168.0.1 255.255.255.0
>   ip nat inside
>
>  int s0
>   ip address x.x.x.x x.x.x.x
>   ip nat outside
>
>  access-list 1 permit 192.168.0.0 0.0.0.255
>
>  ip nat inside source list 1 interface s0 overload
>
> Then port forware all SMTP-destined traffic sent to your x.x.x.x public IP
> address to your internal mail server:
>
> conf t
>  ip nat inside source static tcp 192.168.0.2 25 x.x.x.x 25 extendable
>
> That's all there is to it.
>
> Regards,
>
> Mark Tinka - CCNA
> Network Engineer
> Africa Online Uganda
> 5th Floor, Commercial Plaza
> 7 Kampala Rd,
> Tel:   +256-41-258143
> Fax:   +256-41-258144
> E-mail: mtinka at africaonline.co.ug
> Web:     www.africaonline.co.ug
>
>
> -----Original Message-----
> From: owner-afnog at afnog.org [mailto:owner-afnog at afnog.org] On Behalf Of
> Richard Mikisa
> Sent: Monday, May 05, 2003 11:54 AM
> To: afnog at afnog.org
> Subject:
>
>
> how do you port forward on a cisco router (2611) e.g if  i want all traffic
> to
> my mail server to be forwarded to the server sitting on my internal lan,
> connection type in this case is ISDN.

-- 
cheers
Richard

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