From: Voss, David (dvoss@xxxxxxxxxxxx)
Date: Mon Aug 26 2002 - 18:51:27 GMT-3
So, if I use subinterfaces, I still have one remaining issue... redirecting
a requested address to an address on my own subnet. Has anyone done this?
interface ethernet 0/1.1
ip address 172.16.10.1 255.255.255.0
ip nat inside
interface ethernet 0/1.11
ip address 200.200.200.5 255.255.255.252
ip nat outside
THE GOAL
ip nat inside source static tcp 172.16.10.8 8080 200.200.200.8 80
!-- Static NAT command that states any packet received in the inside
!-- interface with a source address of 172.16.10.8:8080 will be
!-- translated to 200.200.200.8:80.
-----Original Message-----
From: Voss, David
Sent: Monday, August 26, 2002 4:25 PM
To: Voss, David; ccielab@groupstudy.com
Subject: RE: NAT Scenario
I should state my question better which actually adds more complexity......
What if you were trying to redirect BACK to the subnet from the person is
coming from.
For example:
I am user 172.20.20.25/24 when I ping 172.20.50.25/24, I should be
redirected to 172.20.20.30/24 so that it answers the ping.
-----Original Message-----
From: Voss, David
Sent: Monday, August 26, 2002 3:40 PM
To: ccielab@groupstudy.com
Subject: NAT Scenario
Here is a NAT Scenario that I cannot find a solution for, but I believe
there must be one:
The Goal: Traffic destined for an IP address must be redirected to a
different one.
Example: Client pings 172.20.20.25, this traffic is redirected to
172.20.50.25 without the user knowing, and a reply is returned.
The Problem: What if your router is running the client (inside) subnet on
the same interface as the server (outside) interface?
interface FastEthernet0/1
ip address 172.20.20.20 255.255.255.0 secondary
ip address 172.20.50.20 255.255.255.0
no ip directed-broadcast
no keepalive
full-duplex
end
How do you apply ip nat (inside/outside)?
ip nat inside (where?)
ip nat outside (where?)
ip nat inside source 172.20.50.25 172.20.20.25
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