On 7/28/10 8:07 AM, Tom Eastep wrote:
> On 7/28/10 7:48 AM, Andrea Perdicchia wrote:
>> In the shorewall man page says "The -m option causes the MAC address of 
>> each packet source to be displayed *if that information is available* "
>> But in my messages.log and kern.log (i use ubuntu server) the mac 
>> address information is not available. How i can enable it?
> 
> Switch to ULOG (http://www.shorewall.net/shorewall_logging.html#ULOG).

Of course, the interface through which logged packets arrive must be
Ethernet; otherwise, there is no ethernet header. On my own firewall
(Lenny), both ULOG and LOG create log messages with the ethernet header
intact:

LOG:

[1187508.980495] net-all:DROP:IN=eth1 OUT=
MAC=00:a0:cc:db:31:c4:00:22:2d:76:5a:aa:08:00 SRC=61.168.222.222
DST=70.90.191.123 LEN=438 TOS=0x00 PREC=0x20 TTL=50 ID=33722 DF
PROTO=UDP SPT=5060 DPT=5060 LEN=418 MARK=0x10000

ULOG:

Jul 28 07:58:06 gateway net-all:DROP: IN=eth1 OUT=
MAC=00:a0:cc:db:31:c4:00:22:2d:76:5a:aa:08:00  SRC=82.140.218.30
DST=70.90.191.123 LEN=95 TOS=00 PREC=0x20 TTL=112 ID=24573 PROTO=UDP
SPT=61877 DPT=45947 LEN=75

Also, note that the sending MAC address (00:22:2d:76:5a:aa) is aways
that of the next-hop router and is usually not that interesting.

-Tom
-- 
Tom Eastep        \ When I die, I want to go like my Grandfather who
Shoreline,         \ died peacefully in his sleep. Not screaming like
Washington, USA     \ all of the passengers in his car
http://shorewall.net \________________________________________________

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