Re: Port forward/bounce no external interface

[Mart Frauenlob <mart.frauenlob@chello.at>]

Mart Frauenlob wrote:
> Don Hoover wrote:
>> I want to forward all connections on a port to another box on the 
>> same internal network.
>>
>> For instance, I want to forward all traffic on my server:5000 to go 
>> anotherbox:9000
>>
>> I have little experience with iptables, and I am currently not using 
>> it at all on this server, so I will need to setup a small iptables 
>> configuration from scratch including any required setup before 
>> whatever command is needed to do this.
>>
>> This will all be in the same network and not actually be going across 
>> interfaces...the client, server, and otherbox are all located on the 
>> same internal network.
>>
>> I am sure this is probably easy for someone what really knows what 
>> they are doing.... AND...I have been reading as much as I can on 
>> this, and all the examples I have found via extensive google 
>> searching all deal with the apparently much more common case of 
>> forwarding incoming connections on a external facing network 
>> interface to a different port for a different IP on an internal 
>> facing interface, ala firewall router.  And that just does not apply 
>> here.  I kinda thought maybe what I wanted was a variation on that 
>> and I tried some different things but none of them worked.
>>
>> Any help?
>>   
> Hello,
>
> Please try:
>
> iptables -t nat -A PREROUTING -s your-network -d server -p tcp --dport 
> -j DNAT --to-destination anotherbox:9000

sorry, I missed the port string.
should be:

iptables -t nat -A PREROUTING -s your-network -d server -p tcp --dport 
5000 -j DNAT --to-destination anotherbox:9000