Block a single IP is the wrong approach (whack-a-mole). You should consider a more comprehensive approach to securing your VoIP environment. Have a look at this wiki:
https://www.voip-info.org/asterisk-security/ -----Original Message----- From: asterisk-users [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of sean darcy Sent: Wednesday, August 29, 2018 10:46 AM To: asterisk-users@lists.digium.com Subject: Re: [asterisk-users] getting invites to rtp ports ?? On 08/29/2018 09:42 AM, Carlos Rojas wrote: > Hi > > Probably somebody is trying to hack your system, you should block that > ip on your firewall. > > Regards > > On Wed, Aug 29, 2018 at 9:34 AM, sean darcy <seandar...@gmail.com > <mailto:seandar...@gmail.com>> wrote: > > I'm getting invites to very high ports every 30 seconds from a > particular ip address: > > Retransmitting #10 (NAT) to 5.199.133.128:52734 > <http://5.199.133.128:52734>: > SIP/2.0 401 Unauthorized > Via: SIP/2.0/UDP > 0.0.0.0:52734;branch=z9hG4bK1207255353;received=5.199.133.128;rport=52734 > From: <sip:37120116780191250@67.80.191.250 > <mailto:sip%3A37120116780191250@67.80.191.250>>;tag=1872048972 > To: <sip:3712011972592181418@67.80.191.250 > <mailto:sip%3A3712011972592181418@67.80.191.250>>;tag=as3a52e748 > Call-ID: 1504207870-295758084-609228182 > CSeq: 1 INVITE > ....... > WARNING[150318]: chan_sip.c:4127 retrans_pkt: Timeout on > 1504207870-295758084-609228182... > > I thought invites had to go to port 5060 or so. I don't understand > why somebody (let's assume a bad guy) is trying ports above 50000. > > sean > > Ok, so the high port is not the destination port but the source port. So I hacked the log warning in chan_sip.c on non-critical invites to show the source ip: ast_log(LOG_WARNING, "Timeout on %s non-critic invite trans from %s.\n", pkt->owner->callid,ast_sockaddr_stringify(sip_real_dst(pkt->owner))); With that in the log, I'm now blocking the ip addresses. Thanks, sean -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Astricon is coming up October 9-11! Signup is available at: https://www.asterisk.org/community/astricon-user-conference Check out the new Asterisk community forum at: https://community.asterisk.org/ New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started 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 -- Astricon is coming up October 9-11! Signup is available at: https://www.asterisk.org/community/astricon-user-conference Check out the new Asterisk community forum at: https://community.asterisk.org/ New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users