On Jul 11, 2010, at 11:38 AM, Michael wrote:

>> If you add the rule:
>> 
>> Log Local Out | TCP | Destination: 0/0 | Port: 1 - 65535
>> 
>> Then a LOG rule is generated for all ports to all destinations for TCP
>> going Out from the AstLinux box.
> 
> I've done that (see attached picture).
> Still I get no log messages on the status page even if I access sites on my 
> external IF.

I tested this, and it works for me.  Remember that 'Log Local Out' only applies 
to packets outbound directly from the local AstLinux box (OUTPUT Chain), *not* 
forwarded packets, (FORWARD Chain).  For example packets from a web browser on 
a LAN NAT'ed subnet will not show with "Log Local Out".  On the other hand, if 
you ssh into the AstLinux box (or use serial console) and enter...

$ curl http://www.astlinux.org >/dev/null

The log will show with the above rule.


> 
> It might seem naive, but if I simple disable the firewall, I can no longer 
> access my external IF from any LAN computers. When the firewall is active, 
> traffic is NATed to the outside and the firewall rules are applied.
> 
> Would disabling the firewall also disable the masquerading (NAT) via the 
> external interface?

Yes.  That explains your results.


Lonnie


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