[ale] Redirect a port

[Christopher Fowler]

On Sat, 2006-01-21 at 13:19 -0500, James P. Kinney III wrote:
> On Sat, 2006-01-21 at 10:01 -0500, Christopher Fowler wrote:
> > I have a service that runs on port 5000 on a server.  I have devices in
> > the field that are configured for 5000 or 5001.  Is it possible to use
> > iptables to redirect requests coming into 5001 to 5000?  I've done this
> > with DNAT but the server that is running the software is not behind a
> > NAT.  It is on a public IP.  So I want to do something like this:
> > 
> > 
> > 0.0.0.0/0 -> 209.168.X.X:5001 -> 5000
> 
> 
> iptables -A nat -m tcp -p tcp  --dport 5001 -j REDIRECT --to-ports 5000

I get an error that no chain exists by that name 'nat'.  I did try
'INPUT' but got an invalid argument error.