Phone does not register through local ip

Hello. It is not possible to connect the phone to the freepbx 15 server via local ip ( at the office (the phone does not register). If I connect this phone using the external ip address of this office, everything works fine. In fail2ban, I added the local network to the exceptions. What prevents him from registering through the local ip ?

Registering through the local IP is very normal. Is the register request even reaching the FreePBX machine?

Have you added the VLAN for to Connectivity ->Firewall->Networks–>Trusted Excluded from Firewall)?

Yes, make sure the PBX is reachable from the phone IP. Also take a ort mirror on your phone you can check if there is actually the SIP registration sending to the right port on local

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