[asterisk-users] OT: Want to capture all SIP messages

Tony Mountifield tony at softins.co.uk
Thu Jun 1 05:09:51 CDT 2017

In article <alpine.DEB.2.20.1705311339370.15080 at ws.sedwards.com>,
Steve Edwards <asterisk.org at sedwards.com> wrote:
> On Wed, 31 May 2017, Steve Edwards wrote:
> > I want to capture all SIP messages.
> >
> > I have about 30 hosts in about 6 colos.
> >
> > My first thought was dumpcap, but the output file name format bugs me.
> >
> > What do you use for long term SIP capture?
> A little more specificity...
> I'd like the capture to be in a series of files that can be 'rotated' or 
> 'aged out' so that I can always have x days of traffic on hand but not 
> have to prune the files to keep the storage requirements reasonable.

On most of my systems I have a script sip-capture:


DATE=`date '+%Y%m%d-%H%M%S'`
FILE=sip-`hostname -s`-$DATE.pkt

cd /var/tmp

tcpdump -C 8 -i any -n -p -s 0 -w $FILE udp port 5060 </dev/null >/dev/null 2>&1 &

I start it in /etc/rc.d/rc.local for want of anywhere better.

Being in /var/tmp, cron.daily/tmpwatch deletes files older than 30 days.
I could just have easily put them somewhere else and used the -W option
to tcpdump to remove old files on a rolling basis.

Tony Mountifield
Work: tony at softins.co.uk - http://www.softins.co.uk
Play: tony at mountifield.org - http://tony.mountifield.org

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