Problem registering speakers behind nat (sip)

Asterisk Asterisk SIP
1

Hi,

I got 3 IP speakers on facility that are in network 10.0.10.0/24
Speaker 1 - 10.0.10.90
Speaker 2 - 10.0.10.91
Speaker 3 - 10.0.10.92
These speakers are behind a router with public static ip adress (mikrotik).

When I try to register them to my issabel/asterisk setup speakers register randomly. What I mean by that is I got 3 active connections shown on my mikrotik

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10.0.10.90 and 10.0.10.92 registered succesfully and I call call speaker freely.
10.0.10.91 didn’t register. The only difference between the 2 registered speakers and 1 unregistered is reply port that is shown in connection.

10.0.10.90
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10.0.10.92
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10.0.10.91
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Only 10.0.10.91 got response from asterisk to port 5060, two other speakers got response to random high port and registered properly, the one with port 5060 didn’t. Why? How can I fix that?

2

Did you tried disable SIP ALG?
I am right that you are using chan_sip? Did you set

nat=force_rport,comedia
externip=your-public-ip
localnet=10.0.10.0/24

Enter asterisk -rvvvvv and sip set debug on and post your logs here.