From: JamesGEF (jamesgef@sympatico.ca)
Date: Sun Nov 23 2003 - 11:58:54 GMT-3
Tony,
The command extendable instructs the router to look beyond the IP header
when performing NAT.
A good example of using the extendable keyword is when you want to NAT
incoming packets to different inside IP addresses based on TCP ports.
For example,
One public IP address: 207.1.1.1
Three inside servers:
1.192.168.1.1 (mail server)
2.192.168.1.2 (web server)
3.192.168.1.3 (ftp server)
ip nat inside source static tcp 192.168.1.1 207.1.1.1 25 extendable
ip nat inside source static tcp 192.168.1.2 207.1.1.1 80 extendable
ip nat inside source static tcp 192.168.1.3 207.1.1.1 21 extendable
In this example, depending on the port number destined to 207.1.1.1, IOS
will translate incoming packets to different private IP addresses.
HTH,
James
----- Original Message -----
From: "Tony Singh (A)" <SinghA1@telkom.co.za>
To: <ccielab@groupstudy.com>
Sent: Sunday, November 23, 2003 6:12 AM
Subject: IP NAT Question
> Hi All
>
>
>
> While reading on Nat configurations I come across the keyword
> "Extendable" Can some please explain to me what this command does and
> how it intergrates with nat translations. I cannot seem to grasp the
> meaning of it from the cisco notes.
>
>
>
> Thanx.
>
>
>
>
>
>
>
>
>
> Anesh Singh (A)
> SinghA1@telkom.co.za
>
>
>
>
>
>
>
>
>
> Powered by Plaxo <http://www.plaxo.com/signature/>
>
> Want a signature like this? <http://www.plaxo.com/signature/>
>
> [GroupStudy removed an attachment of type image/gif which had a name of
image001.gif]
>
> _______________________________________________________________________
> Please help support GroupStudy by purchasing your study materials from:
> http://shop.groupstudy.com
>
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Fri Dec 12 2003 - 12:29:16 GMT-3