On Jul 11, 2010, at 12:19 PM, Michael wrote:

> Lonnie Abelbeck wrote:
> 
>> 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...
> 
> That explains it. Thanks a lot. Of course, I thought I would log ALL 
> outgoing traffic and I thus used a local browser on the LAN to generate 
> traffic.
> 
> So, how would I go and monitor the FORWARD chain? Because, if the astlinux 
> box is used as a router, then this is the interesting information.

AstLinux uses Arno's IPtables Firewall script for the firewall.  If I remember 
correctly, there is no direct support for logging all FORWARD Chain traffic.

I don't know how useful that would be anyway, a lot of chaff to sort through.  
Logging blocked traffic is usually more useful.

The firewall Tab options:

__ Log Denied TCP attempts to privileged and unprivileged ports

__ Log Denied UDP attempts to privileged and unprivileged ports

__ Log Denied non-TCP/UDP/ICMP attempts

(restart firewall after an change)

can be quite useful to track down firewall configuration issues.

Lonnie
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