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<td id="header-avatar-image-container" valign="top" style="padding: 0px; border-collapse: collapse; vertical-align: top; width: 32px; padding-right: 9px"><a href="https://wiki.asterisk.org/wiki/display/~mdavenport?src=email" style="color: #3b73af; text-decoration: none"><img id="header-avatar-image" class="image_fix" src="cid:avatar_a25fbf8466474d2c6e78adaa29880def" height="32" width="32" border="0" style="border-radius: 3px; vertical-align: top" /></a></td>
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<td id="page-title-pattern-icon-image-container-cell" style="padding: 0px; border-collapse: collapse; width: 16px; padding: 9px 8px 0px 0px; mso-text-raise: 5px; mso-line-height-rule: exactly"><a href="https://wiki.asterisk.org/wiki/display/AST/Migrating+from+chan_sip+to+res_pjsip?src=email" title="page icon" style="vertical-align: top;; color: #3b73af; text-decoration: none"><img style="vertical-align: top; display: block;" src="cid:page-icon" alt="page icon" title="page icon" height="16" width="16" border="0" /></a></td>
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<table class="content-excerpt-pattern" cellspacing="0" cellpadding="0" border="0" width="100%" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; color: #333; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px; mso-line-height-rule: exactly; mso-text-raise: 1px">
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<td class="content-excerpt-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 0 24px"> <p class="diff-context-placeholder" style="margin: 10px 0 0 0; margin-top: 0">...</p>
<ul class="diff-block-context" style="margin: 10px 0 0 0">
<li>Remove all PJSIP modules from the modules directory (often, /usr/lib/asterisk/modules)</li>
<li>Remove the configuration file (pjsip.conf)</li>
<li>Un-install and re-install Asterisk with no PJSIP related modules.</li>
<li>If you are wanting to use chan_pjsip alongside chan_sip, you could change the port or bind interface of your chan_pjsip transport in pjsip.conf</li>
</ul> <h1 id="Migratingfromchan_siptores_pjsip-NetworkAddressTranslation(NAT)" class="diff-block-target diff-block-context" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0"> <span class="diff-html-added" id="added-diff-0" style="font-size: 100%; background-color: #ddfade;">Network Address Translation (NAT)</span> </h1> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">When configured with </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">chan_sip</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">, peers that are, relative to Asterisk, located behind a NAT are configured using the </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">nat</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> parameter. In versions 1.8 and greater of Asterisk, the following nat parameter options are available:</span> </p>
<div class="table-wrap diff-block-target diff-block-context" style="margin: 10px 0 0 0; overflow-x: auto">
<table class="confluenceTable" style="border-collapse: collapse; border: 1px solid #ddd;; border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; color: #333; border-collapse: collapse; margin: 10px 0 0 0; overflow-x: auto; margin-top: 0">
<tbody>
<tr>
<th class="confluenceTh" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;background-color: #F0F0F0; font-weight: bold;; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left; background-color: #f0f0f0; font-weight: bold"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Value</span></th>
<th class="confluenceTh" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;background-color: #F0F0F0; font-weight: bold;; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left; background-color: #f0f0f0; font-weight: bold"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Description</span></th>
</tr>
<tr>
<td class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">no</span></td>
<td class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Do not perform NAT handling other than </span><a href="http://www.ietf.org/rfc/rfc3581.txt" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">RFC 3581</span></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">.</span></td>
</tr>
<tr>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">force_rport</span></td>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">When the rport parameter is not present, send responses to the source IP address and port anyway, as though the rport parameter was present</span></td>
</tr>
<tr>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">comedia</span></td>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Send media to the address and port from which Asterisk received it, regardless of where SDP indicates that it should be sent</span></td>
</tr>
<tr>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">auto_force_rport</span></td>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Automatically enable the sending of responses to the source IP address and port, as though rport were present, if Asterisk detects NAT. Default.</span></td>
</tr>
<tr>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">auto_comedia</span></td>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Automatically send media to the port from which Asterisk received it, regardless of where SDP indicates that it should be sent, if Asterisk detects NAT.</span></td>
</tr>
</tbody>
</table>
</div> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Older versions of Asterisk had less granularity for the nat parameter:</span> </p>
<div class="table-wrap diff-block-target diff-block-context" style="margin: 10px 0 0 0; overflow-x: auto">
<table class="confluenceTable" style="border-collapse: collapse; border: 1px solid #ddd;; border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; color: #333; border-collapse: collapse; margin: 10px 0 0 0; overflow-x: auto; margin-top: 0">
<tbody>
<tr>
<th class="confluenceTh" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;background-color: #F0F0F0; font-weight: bold;; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left; background-color: #f0f0f0; font-weight: bold"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Value</span></th>
<th class="confluenceTh" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;background-color: #F0F0F0; font-weight: bold;; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left; background-color: #f0f0f0; font-weight: bold"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Description</span></th>
</tr>
<tr>
<td class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">no</span></td>
<td class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Do not perform NAT handling other than RFC 3581</span></td>
</tr>
<tr>
<td class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">yes</span></td>
<td class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Send media to the port from which Asterisk received it, regardless of where SDP indicates that it should be sent; send responses to the source IP address and port as though rport were present; and rewrite the SIP Contact to the source address and port of the request so that subsequent requests go to that address and port.</span></td>
</tr>
<tr>
<td class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">never</span></td>
<td class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Do not perform any NAT handling</span></td>
</tr>
<tr>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">route</span></td>
<td colspan="1" class="confluenceTd" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;; padding: 0px; border-collapse: collapse; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left"><span><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Send media to the port from which Asterisk received it, regardless of where SDP indicates that it should be sent and rewrite the SIP Contact to the source address and port of the request so that subsequent requests go to that address and port.</span></span></td>
</tr>
</tbody>
</table>
</div> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">In </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">chan_pjsip</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">, the </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">endpoint</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> options that control NAT behavior are:</span> </p>
<ul class="diff-block-target diff-block-context" style="margin: 10px 0 0 0">
<li> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">rtp_symmetric - Send media to the address and port from which Asterisk receives it, regardless of where SDP indicates that it should be sent</span> </li>
<li> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">force_rport - Send responses to the source IP address and port as though port were present, even if it's not</span> </li>
<li> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">rewrite_contact - Rewrite SIP Contact to the source address and port of the request so that subsequent requests go to that address and port.</span> </li>
</ul> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Thus:</span> </p>
<div class="table-wrap diff-block-target diff-block-context" style="margin: 10px 0 0 0; overflow-x: auto">
<table class="confluenceTable" style="border-collapse: collapse; border: 1px solid #ddd;; border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; color: #333; border-collapse: collapse; margin: 10px 0 0 0; overflow-x: auto; margin-top: 0">
<tbody>
<tr>
<th class="confluenceTh" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;background-color: #F0F0F0; font-weight: bold;; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left; background-color: #f0f0f0; font-weight: bold"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">chan_sip (sip.conf)</span></th>
<th class="confluenceTh" style="border: 1px solid #DDD; padding: 5px 7px; min-width: 0.6em; text-align: left; vertical-align: top;background-color: #F0F0F0; font-weight: bold;; border: 1px solid #ddd; padding: 7px 10px; vertical-align: top; text-align: left; background-color: #f0f0f0; font-weight: bold"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">chan_pjsip (pjsip.conf)</span></th>
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<table class="diff-macro diff-html-added" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;background-color: #ddfade;border-color: #93c49f;; border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; color: #333">
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB/5639/a252d7f5e75d7a8bf7047b4b2c92f71a56a8f048.48/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;; max-width: none" /> </span>No Format</span></th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; padding: 0px; border-collapse: collapse"> <pre style="margin: 10px 0 0 0; margin-top: 0">
<span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">[mypeer1]
type=peer
nat=yes
;...
[mypeer2]
type=peer
nat=no
;...
[mypeer3]
type=peer
nat=never
;...
[mypeer4]
type=peer
nat=route
;...
</span>
</pre> </td>
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<table class="diff-macro diff-html-added" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;background-color: #ddfade;border-color: #93c49f;; border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; color: #333">
<thead>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB/5639/a252d7f5e75d7a8bf7047b4b2c92f71a56a8f048.48/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;; max-width: none" /> </span>No Format</span></th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; padding: 0px; border-collapse: collapse"> <pre style="margin: 10px 0 0 0; margin-top: 0">
<span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">[mypeer1]
type=endpoint
rtp_symmetric=yes
force_rport=yes
rewrite_contact=yes
;...
[mypeer2]
type=endpoint
rtp_symmetric=no
force_rport=no
rewrite_contact=no
;...
[mypeer3]
type=endpoint
rtp_symmetric=no
force_rport=no
rewrite_contact=no
;...
[mypeer4]
type=endpoint
rtp_symmetric=no
force_rport=yes
rewrite_contact=yes
;...
</span>
</pre> </td>
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