[tproxy] failure to apply snat mapping?

[KOVACS Krisztian]

  Hi,

On Wed, 2004-04-21 at 19:35, Lennert Buytenhek wrote:
> Let's say that I have an app that connects to IP address 1.2.3.4, and uses
> tproxy to fake the source address as 5.6.7.8.  Bind the socket, then call
> into tproxy, and then connect() and ta da -- everything works as expected.
> 
> Now I decide that that app should not connect to 1.2.3.4, but instead to
> 1.2.3.5.  I don't want to modify the source and restart it, so I add a nat
> rule in the iptables nat/OUTPUT chain to DNAT the address to 1.2.3.5.
> 
> The app now (unknowingly) connects to 1.2.3.5, that works fine.  But.. the
> source address used for the connection is now the source address of the box
> and not anymore 5.6.7.8? :((

  Do you have "NAT of local connections" enabled or disabled?

-- 
 Regards,
   Krisztian KOVACS