Re: Nat before routing decision

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On Mon, 2004-11-15 at 09:51, Jason Opperisano wrote:
> On Mon, 2004-11-15 at 06:44, thomas.elsaesser@xxxxxxxxxxxxx wrote:
> > Dear all,
> > 
> > I need src nat before the packet go to the routing decision.
> > How can i do it.
> > 
> > Kind Regards
> > 
> > Thomas
> 
> well, SNAT is only valid in POSTROUTING of the NAT table.  if you need
> to apply alternate routing to a packet and translate it's source, you
> can follow the theory of:
> 
> 1) mark packet in PREROUTING of MANGLE
> 2) route based on MARK
> 3) SNAT packet in POSTROUTING of NAT
<snip>
It has been a long time since I worked with it so I don't remember the
details but is the stateless NAT in iproute2 done before routing
decisions? - John
-- 
John A. Sullivan III
Chief Technology Officer
Nexus Management
+1 207-985-7880
john.sullivan@xxxxxxxxxxxxx
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