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@@ -0,0 +1,27 @@
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+#####
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+NAT
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+#####
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+
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+NAT is Network Address Translation. When problems happen with VOIP the usual suspect is NAT.
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+
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+Freeswitch NAT
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+^^^^^^^^^^^^^^^
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+
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+`FreeSWITCH documented infomation on NAT`_
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+
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+NAT Example: If you have a static ip and freeswitch is behind a firewall
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+
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+* autonat:xxx.xxx.xxx.xxx (for the static ip)
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+
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+* If using UPnP or PMP on the firewall
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+
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+* In Debian OS /etc/default/freeswitch remove -nonat
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+* Set external rtp and sip ip to auto-nat in advanced -> variables
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+
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+If server is **not** behind NAT then default config works
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+
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+
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+
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+
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+
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+.. _FreeSWITCH documented infomation on NAT: https://freeswitch.org/confluence/dosearchsite.action?queryString=nat
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Len