Yes fail2ban is working fine. I did NOT have a filter for the "rejected because extension not found" line yet (I'm still working on it). Hoping for input on the regex.
Thanks ________________________________ From: [email protected] [[email protected]] On Behalf Of Carlos Rojas [[email protected]] Sent: Wednesday, December 28, 2011 11:11 PM To: Asterisk Users List Subject: Re: [asterisk-users] Interesting attack tonight & fail2ban them Hello, Do you set up, your logrotate in /etc/asterisk ? Do you test that your fail2ban work fine? Regards On Wed, Dec 28, 2011 at 11:07 PM, Michelle Dupuis <[email protected]<mailto:[email protected]>> wrote: I happened to be in the cli tonight as some (208.122.57.58) initiated a simple attack - just trying to make long distance calls from outside context. Although harmless, this went on for several minutes as the idiot just used up my bandwidth with SIP messages. Here's and example: [2011-12-28<tel:%5B2011-12-28> 22:53:42] NOTICE[9635]: chan_sip.c:14035 handle_request_invite: Call from '' to extension '6442032987219' rejected because extension not found. [2011-12-28<tel:%5B2011-12-28> 22:53:44] NOTICE[9635]: chan_sip.c:14035 handle_request_invite: Call from '' to extension '7442032987216' rejected because extension not found. [2011-12-28<tel:%5B2011-12-28> 22:53:46] NOTICE[9635]: chan_sip.c:14035 handle_request_invite: Call from '' to extension '8442032987216' rejected because extension not found. [2011-12-28<tel:%5B2011-12-28> 22:53:48] NOTICE[9635]: chan_sip.c:14035 handle_request_invite: Call from '' to extension '008442032987215' rejected because extension not found. [2011-12-28<tel:%5B2011-12-28> 22:53:50] NOTICE[9635]: chan_sip.c:14035 handle_request_invite: Call from '' to extension '007442032987218' rejected because extension not found. [2011-12-28<tel:%5B2011-12-28> 22:53:52] NOTICE[9635]: chan_sip.c:14035 handle_request_invite: Call from '' to extension '006442032987219' rejected because extension not found. [2011-12-28<tel:%5B2011-12-28> 22:53:54] NOTICE[9635]: chan_sip.c:14035 handle_request_invite: Call from '' to extension '005442032987216' rejected because extension not found. [2011-12-28<tel:%5B2011-12-28> 22:53:56] NOTICE[9635]: chan_sip.c:14035 handle_request_invite: Call from '' to extension '004442032987250' rejected because extension not found. I thought that it might be worth adding a line to my fail2ban filter, but am looking for a hand with the regex. I have come up with: NOTICE.* .*: Call from '' to extension '.*' rejected because extension not found but I realize that anyone misdialling a valid extension a few times gets cut off. Can someone suggest an improvement? (How could I limit this to 4 or more digits dialled for example?) Thanks! -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
-- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
