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  1. copy the external.xml and rename it doublenat.xml
  2. in doublenat.xml, change the profile name: <profile name="doublenat">
  3. add the <param name="ext-rtp-ip" value="$${external_rtp_ip}"/>
  4. add the <param name="ext-sip-ip" value="$${external_sip_ip}"/>
  5. add the <param name="force-register-domain" value="$${domain}"/>
  6. add the <param name="auth-calls" value="true"/>
  7. change port to 5090 ( make sure to change it on the phone as well )
  8. add the <param name="aggressive-nat-detection" value="true"/>
  9. add the <param name="apply-nat-acl" value="rfc1918"/>
  10. register the phone
  11. check to see if your phone is registered with the doublenat profile.
 

Code Block
sofia status profile doublenat

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More in depth article at Nat

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See Also

Auto

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NAT- let FreeSWITCH do the work

NAT Traversal

External profile

Access Control List (ACL) About modifying NAT behavior when matching a certain access list

General NAT example scenarios - real-world examples

NAT - Network Address Translation

NAT traversal - user NAT traversal

sofia ext-rtp-ip settings