Re: Help on outgoing packet (without NAT)

[Leonardo Rodrigues <leolistas@solutti.com.br>]

Em 22/09/11 13:44, Jorge Bastos escreveu:
>
> Well I was convinced that, since I'm not using NAT on this machine, 
> this couldn't be done on the NAT table.
> Thanks, after all, it works.

     Yes now you're using NAT .... we usually say NAT to some kind of 
SOURCE NAT, for example done on cable/DSL modens. but any kind of 
address translation is a NAT, including your case in which you want to 
change the destination of some packet, usually known as port forwarding. 
Yes it's a NAT, a Destination NAT.

     if i'm not mistaken, just pay attention that as you're using NAT 
and you'll have packets flowing 'through' your machine, you must have the

/proc/sys/net/ipv4/ip_forward

     set to 1

     you also need appropriate FORWARD rules to allow that packets to 
flow through your machine. If you're running with the default FORWARD 
ACCEPT default rule and no rules there, than you'll have no problem. But 
keep in mind that packets are going through filter table, FORWARD chain 
and ip_forward must be enabled for that to work.


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	Leonardo Rodrigues
	Solutti Tecnologia
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