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Remote Extension Asterisk Grandstream GXP 2000


triyng to get  Grandstream GXP 2000 to work externally with my asterisk system. Looking at IP tables logs I can see my IP coming into the system on port 5060. My grandstream shows detected NAT type is port restricted cone when I specify my stun server.

sip_nat_conf is as below:


Asterisk NOW version 1.7.1 and Grandstream is on latest firmware. To note I have had this extension working as a remote extension with 3CX with no issues so my firwall at home is ok.
1 Solution
You havent said what doesnt work.
Does it register?
Can you make calls?
Are you getting no audio in one direction?
on firewall at asterisk side, open these ports pointing to Asterisk server.

SIP: UDP 5060
RTP: 10000-20000

BTW: pls hide your Asterisk IP on the post, since this is not recommended for security.
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