From: Daniel O'Sheedy (dansheedy@gmail.com)
Date: Sat Dec 03 2005 - 14:45:07 GMT-3
Hi Israel,
What you have are doing here, is redirecting ports inward.
If you want to map different ports to different internal servers, use this
keyword.
ip nat inside source static tcp 192.168.1.2 80 10.103.1.1 80 extendable
This will send requests for port 80 on 10.103.1.1 inwards to the internal
server 192.168.1.2 with the port 80-
You could then add another line:
ip nat inside source static tcp 192.168.1.3 21 10.103.1.1 21 extendable
Now, when we try port 21 on the 10.103.1.1 address, it will send it to a
different internal server. Cool huh? This means for people that are low on
public IPs, they can still spread the services among multiple internal
servers.
You can also do this with static IPs:
ip nat inside source static 192.168.1.2 205.6.6.1 extendable
ip nat inside source static 192.168.1.2 205.6.6.10 extendable
Here we see two external IP addresses, but we can send them both to one
internal machine. Great if you want to pull a machine out for maintenance.
hope that helps!
Dan
#13884
----- Original Message -----
From: "Israel Gonzalez" <israelgq@gmail.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, December 03, 2005 6:11 PM
Subject: Question about "extendable" option when configuring static NAT
> Hello everybody,
>
>
> Somebody can help me with this clarification? I was configuring static NAT
> on a router and i noticed that there is an option called "extendable". I
> looked this option in the doc cd but the explanation is not so clear. So I
> would like to know if somebody can help to understand what is the
> difference
> between using it and not using this option
>
> ip nat inside source static tcp 192.168.1.2 80 10.103.1.1 80
>
> ip nat inside source static tcp 192.168.1.2 80 10.103.1.1 80 extendable
>
> Thanks!
>
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