[Snort-users] How to stop snort to log startup messages into syslog?

Gerhard Mourani GMourani at ...16783...
Tue Apr 15 13:58:19 EDT 2014


Yes but nothing that show how logs are redirected from /var/log/messages to LOG=$PROCESS_LOG_DIR/$SENSOR/snortu-$i.log

[cid:B311EAD7-4A88-4855-B270-EB2E7034A14D at ...16786...]

On Apr 15, 2014, at 1:55 PM, Jeremy Hoel <jthoel at ...11827...<mailto:jthoel at ...11827...>> wrote:

It's not my scripts.. I would lookup the NSM scripts and maybe grab a SecurityOnion live CD and check out it's startup scripts.

Also.. LOG is defined as:   LOG=$PROCESS_LOG_DIR/$SENSOR/snortu-$i.log




On Tue, Apr 15, 2014 at 5:50 PM, Gerhard Mourani <GMourani at ...16783...<mailto:GMourani at ...16783...>> wrote:
Not clear, I can’t find the parameter related to $LOG in your message, seem to be inside the process_start script.

<Signature-525x150.jpg>

On Apr 15, 2014, at 1:25 PM, Jeremy Hoel <jthoel at ...11827...<mailto:jthoel at ...11827...>> wrote:

Found it..

>From the So mailing list..  (more info here - http://seclists.org/snort/2013/q2/55)

---------------
Hi Phil,

In Security Onion, we start Snort using the NSMnow scripts which
provide a function called process_start.  This function starts the
process and writes the log to a dedicated log file (not syslog).  In
the following code snippet, you can see that we're logging to $LOG,
which ends up being /var/log/nsm/HOSTNAME-INTERFACE/snortu-1.log.

                # Start $IDS_LB_PROCS instances of Snort using pfring
load-balancing
                for i in `seq 1 $IDS_LB_PROCS`; do
                        PID=$PROCESS_PID_DIR/$SENSOR/snortu-$i.pid
                        LOG=$PROCESS_LOG_DIR/$SENSOR/snortu-$i.log
                        PERFMON=$SENSOR_LOG_DIR/snort-$i.stats
                        UNI_DIR=$SENSOR_LOG_DIR/snort-$i
                        mkdir -p $UNI_DIR
                        chown $SENSOR_USER:$SENSOR_GROUP $UNI_DIR
                        [ -z "$SKIP_SNORT_ALERT" ] && process_start
"snort" "-c $SNORT_CONFIG -u $SENSOR_USER -g $SENSOR_GROUP -i
$SENSOR_INTERFACE_SHORT -F /etc/nsm/$SENSOR/bpf-ids.conf -l $UNI_DIR
--perfmon-file $PERFMON $SNORT_OPTIONS
" "$PID" "$LOG" "snort-$i (alert data)"
                done



On Tue, Apr 15, 2014 at 5:22 PM, Jeremy Hoel <jthoel at ...11827...<mailto:jthoel at ...11827...>> wrote:
But that option is just for it's alerting output right? Not the startup/shutdown messages (of which there are more then a few).  I commented out the output line (output alert_syslog: LOG_LOCAL6 LOG_ALERT) in my snort.conf and I still see the startup/shutdown messages.

For the OP - Security Onion does this (negates the messages in syslog) and it does it by starting snort differently. I'm trying to find the thread that talked about it.


On Tue, Apr 15, 2014 at 5:02 PM, Nicholas Mavis (nmavis) <nmavis at ...589...<mailto:nmavis at ...589...>> wrote:
You can turn off syslogging in your Snort.conf file. I would recommend
reading through the following:

http://manual.snort.org/node21.html

-Nick


On 4/15/14, 11:55 AM, "Gerhard Mourani" <GMourani at ...16783...<mailto:GMourani at ...16783...>> wrote:

>Hello list,
>
>I don¹t know if there is a way to start the Snort process without having
>its startup messages being logged into syslog -> /var/log/messages?
>I¹ve tried to start it with the following parameters without success,
>still log startup messages into the /var/log/messages file.
>
>snort -c /etc/snort/snort.conf -D -g snort -q -N --daq afpacket --daq-var
>buffer_size=512MB -i eth1
>
>Regards,
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