[ale] iptables redirect

[JK]

Chris Fowler wrote:
> Is is possible to use iptables to redirect from one server to another.


Sure.

iptables -t nat -I PREROUTING -i $ETH_INGRESS -d $ORIG_DEST_IP -j DNAT --to-dest $NEW_DEST_IP

As long as the machine handling the packet knows how to route traffic
to NEW_DEST_IP, you should be OK.  You'll probably also need to SNAT
that traffic, though, unless the NEW_DEST_IP machine's route back to
the original source passes through the machine you're installing the
iptables rule on:

iptables -t nat -I POSTROUTING -o $ETH_EGRESS -d $NEW_DEST_IP -j SNAT --to-dest $MY_IP

-- JK



> Here is the issue.
> 
> We have a new address range.  I now have two sets of public addresses.
> I need to release the old set.  I have many devices programmed to go to
> the old IP.  Can I create an iptables rule on 65.254.217.212 to redirect
> to 74.113.143.4 ?  Any request to the old server will be sent to the new
> server.  After I reprogram the devices then I'll relinquish the old
> address.
> 
> Chris
> 
> 
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