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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>How about using local-policy instead of HMR? <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>From-address *<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>To-address <a href="mailto:*@voip.myvoice.net">*@voip.myvoice.net</a><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Policy-attributes<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'> Next-hop Softswitch<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Realms, etc, would be pursuant to your needs, of course.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal style='background:#F7F9FD'><b><span lang=EN style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>---<o:p></o:p></span></b></p><p class=MsoNormal style='background:#F7F9FD'><b><span lang=EN style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Brandon Buckner<o:p></o:p></span></b></p><p class=MsoNormal style='background:#F7F9FD'><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Switching Technician / VoIP Admin</span></b><b><span lang=EN style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></b></p><p class=MsoNormal style='background:#F7F9FD'><b><span lang=EN style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Iowa Network Services<o:p></o:p></span></b></p><p class=MsoNormal style='background:#F7F9FD'><b><span lang=EN style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><a href="mailto:brandonb@netins.com">brandonb@netins.com</a><o:p></o:p></span></b></p><p class=MsoNormal style='background:#F7F9FD'><span lang=EN style='font-size:8.5pt;font-family:"Tahoma","sans-serif";color:#2B3E52'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='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><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> voiceops-bounces@voiceops.org [mailto:voiceops-bounces@voiceops.org] <b>On Behalf Of </b>Chet Curry<br><b>Sent:</b> Thursday, June 16, 2011 3:58 PM<br><b>To:</b> voiceops@voiceops.org<br><b>Subject:</b> [VoiceOps] SBC's that drop traffic based on domain<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In an effort to mitigate DDOS attack’s I am trying to deny all traffic based on the request-uri host domain. The reason being from what I see is “most” attacks are sent to the SBC’s IP address and does use the domain name. When the proper domain is supplied I would like to allow that packet. All other I will not respond to period.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Example of hacker Requet URI<o:p></o:p></p><p class=MsoNormal>Ex. <span class=sipmethod><b><span style='font-size:8.5pt;font-family:"Courier New";color:#1E508A'>INVITE</span></b></span><span class=apple-converted-space><span style='font-size:8.5pt;font-family:"Courier New";color:#444444'> </span></span><span class=sipscheme><span style='font-size:8.5pt;font-family:"Courier New";color:gray'>sip100:</span></span><span class=sipruri><b><span style='font-size:8.5pt;font-family:"Courier New";color:#1E508A'>199.44.55.22</span></b></span><span class=apple-converted-space><span style='font-size:8.5pt;font-family:"Courier New";color:#444444'> </span></span><span class=sipversion><span style='font-size:8.5pt;font-family:"Courier New";color:gray'>SIP/2.0<o:p></o:p></span></span></p><p class=MsoNormal><span class=sipversion><span style='font-size:8.5pt;font-family:"Courier New";color:gray'><o:p> </o:p></span></span></p><p class=MsoNormal>Legit Request URI<o:p></o:p></p><p class=MsoNormal>Ex. <span class=sipmethod><b><span style='font-size:8.5pt;font-family:"Courier New";color:#1E508A'>INVITE</span></b></span><span class=apple-converted-space><span style='font-size:8.5pt;font-family:"Courier New";color:#444444'> </span></span><span class=sipscheme><span style='font-size:8.5pt;font-family:"Courier New";color:gray'><a href="sip:7724558787@voip.myvoice.net">sip:7724558787@<span style='background:yellow;mso-highlight:yellow'>voip.</span><b><span style='background:yellow;mso-highlight:yellow'>myvoice.net</span></b></a></span></span><span class=apple-converted-space><span style='font-size:8.5pt;font-family:"Courier New";color:#444444'> </span></span><span class=sipversion><span style='font-size:8.5pt;font-family:"Courier New";color:gray'>SIP/2.0<o:p></o:p></span></span></p><p class=MsoNormal><span class=sipversion><span style='font-size:8.5pt;font-family:"Courier New";color:gray'><o:p> </o:p></span></span></p><p class=MsoNormal><span class=sipversion><span style='font-size:8.5pt;font-family:"Courier New";color:gray'><o:p> </o:p></span></span></p><p class=MsoNormal><span class=sipversion><span style='font-size:8.5pt;font-family:"Courier New";color:gray'><o:p> </o:p></span></span></p><p class=MsoNormal>I have tried to create an HMR on ACME with little success. I can get the registers to not respond yet only if <a href="sip:199.44.55.22">sip:199.44.55.22</a> is use. If the attacker uses <a href="sip:100@199.44.55.22">sip:100@199.44.55.22</a> the SBC still will respond with a 403. <o:p></o:p></p><p class=MsoNormal>Besides that All invites are always responded to regardless even though the HMR(Header Manipulation) should be using Invite and registration meathods.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have tried to get ACME to come up with a solution yet have been unsuccessful. They will not even take my request for a feature enhancement. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Has anyone had any successful experience at implementing this on any other SBC platform? I know there are many ways to protect yourself from DDOS attacks yet to me this is a simple first line of defense.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><img border=0 width=624 height=499 id="Picture_x0020_1" src="cid:image003.png@01CC2C44.F5FE8C40" alt="Description: signature2"><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>