Interesting SIP attack in the logs just ... / 2010-10-04

Interesting SIP attack in the logs just now:

[2010-10-04 13:56:40] NOTICE[24598] chan_sip.c: Registration from '"4282946309"<sip:4282946309@xx.xx.xx.xxx>' failed for '211.234.117.92' - No matching peer found
[2010-10-04 13:56:41] NOTICE[24598] chan_sip.c: Registration from '"2466009100"<sip:2466009100@xx.xx.xx.xxx>' failed for '211.234.117.92' - No matching peer found
[2010-10-04 13:56:48] NOTICE[24598] chan_sip.c: Registration from '"2466009100" <sip:2466009100@xx.xx.xx.xxx>' failed for '211.234.117.92' - No matching peer found
[2010-10-04 13:56:49] NOTICE[24598] chan_sip.c: Registration from '"2466009100" <sip:2466009100@xx.xx.xx.xxx>' failed for '211.234.117.92' - No matching peer found

.. 10815 entries skipped

[2010-10-04 14:02:00] NOTICE[24598] chan_sip.c: Registration from '"2466009100" <sip:2466009100@xx.xx.xx.xxx>' failed for '211.234.117.92' - No matching peer found

I guess an entire dictionary flew by in somewhat over 5 minutes, causing some delay on the line.