hi

marco strambino wrote:
> In new efw 2.2 RC3 appeared the new feature  Firewall -> port forwarding ->
> "source nat".
> Has someone already documented how this new feature works?
> I mean, which differences are there between this new feature and the classic
> "port forwarding"?

The documentation is on its way, we did'nt made it to finish it yet, 
needless to say that we planned to have it ready for a while now.

While port forwarding changes the destination ip address (DNAT), SNAT 
changes only the source ip address, that's what happens when you have a 
big LAN which shares the same uplink ip address. Then every source ip 
address of every outgoing packet will be replaced with the ip address of 
your uplink. (This behaviour is defined as a "system rule")

With that feature you can for example define that a certain host in 
orange should exit with a certain ip address (mailserver for example). 
That makes sense, if you have multiple ip addresses on an uplink.

Or for example you could hide your workstations in GREEN behind the 
ORANGE ip address when they make connections to ORANGE, which for 
example allows you to have workstations in ORANGE, which do not have set 
any default gateway.
There are plenty of scenarios...

peter

-- 
:: e n d i a n
:: open source - open minds

:: peter warasin
:: http://www.endian.com   :: [EMAIL PROTECTED]

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