port translation on the same network

port translation on the same network

[gene bene]

I have a print job in my network which comes in on port 10001 raw packets
(from a citrix server)

I need to use iptables to translate the port number to 9100

I have tried to set up a virtual ip (eth0:0) and use DNAT and SNAT to
translate the port with no success.

Can anyone help me with the correct settings?

Gene

Re: port translation on the same network

[George Alexandru Dragoi]

iptables -t nat -A PREROUTING -i eth0 -d <my ip> -p tcp --dport 10001
-j SNAT --to <my ip>:9100

On Sun, 18 Jul 2004 19:34:28 +1000, gene bene <phacoboy@hotpop.com> wrote:
> I have a print job in my network which comes in on port 10001 raw packets
> (from a citrix server)
> 
> I need to use iptables to translate the port number to 9100
> 
> I have tried to set up a virtual ip (eth0:0) and use DNAT and SNAT to
> translate the port with no success.
> 
> Can anyone help me with the correct settings?
> 
> Gene
> 
>

Re: port translation on the same network

[Antony Stone]

On Sunday 18 July 2004 10:34 am, gene bene wrote:

> I have a print job in my network which comes in on port 10001 raw packets
> (from a citrix server)
>
> I need to use iptables to translate the port number to 9100
>
> I have tried to set up a virtual ip (eth0:0) and use DNAT and SNAT to
> translate the port with no success.
>
> Can anyone help me with the correct settings?

Apply this rule on the machine receiving the packets:

iptables -A PREROUTING -t nat -p tcp --dport 10001 -j DNAT --to :9100

(Assuming you meant they are TCP packets; if they're UDP just change the rule 
in the obvious manner).

Regards,

Antony.

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