SIP won't Register (1 binding )

Asterisk Asterisk SIP
1

I Created Asterisk on VPS .
some ip can register with server
some other not register and give me like this on wireshark

116515 2844.015784 172.20.10.6 159.65.61.74 SIP 565 Request: REGISTER sip:gad.appclick.tech (1 binding)

2

Which address is which? What appears in the Asterisk full log with verbosity at least 5?

1 binding is the normal situation.

3

No thing upper like softphone is never connect to my server and on tcpdump no packet come from my ip