<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I assume that you checked and the remote IP is a legitimate IP phone? If not, it could be an attempt to break into your system.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If it is a legitimate IP phone, make sure that the SIP configuration is correct – if the SIP authentication fails, you can see this happening.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='margin-left:.5in'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] <b>On Behalf Of </b>Jonas Kellens<br><b>Sent:</b> Thursday, October 28, 2010 12:39 AM<br><b>To:</b> Asterisk Users Mailing List - Non-Commercial Discussion<br><b>Subject:</b> [asterisk-users] SIP client floods port 5060 and gets blocked<o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Helvetica","sans-serif"'>Hello,<br><br>Is there any reason why an IP-phone would pounder on port 5060 ? My firewall blocks the public IP because it thinks the remote IP is port scanning on port 5060.<br><br>I think the phone is just registering but for some reason it does this repeatedly in a very short time.<br><br><br>Oct 28 09:01:48 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48073 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:01:49 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48074 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:01:50 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48075 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:01:52 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48076 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:01:56 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48077 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:02:00 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48078 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:02:04 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48079 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:02:08 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48083 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:02:12 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48084 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:02:16 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48085 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br>Oct 28 09:02:20 astserver kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:00:00 SRC=remote_ip DST=server_ip LEN=696 TOS=0x00 PREC=0x00 TTL=53 ID=48087 DF PROTO=UDP SPT=2367 DPT=5060 LEN=676 <br><br><br>Any input on this ?!<br><br><br>Kind regards,<br>Jonas.</span><o:p></o:p></p></div></body></html>