Help! Problem with dynamic IP and SIP registration


I’m French so excuse me for my bad english :unamused:

I’ve installed an Asterisk for Debian testing and I create a SIP trunk for outbound call. The authentification with my SIP provider is good the day when I create the trunk but when my WAN IP change (next days), the authentification is impossible (manager message: UNREACHEBLE and Request Send).

Please could you help me? I think the problem is my IP dynamic connection because with a static IP I don’t have problem.

Thanks !!