Local DNS not reliable

[pscar13 (Phil SCAR)]

My problem was here:

@pscar13

…
The netbios name is added to the DNS even though another name has been declared in IPFire.
In my case, if I plug my laptop into a fixed connection via USB (to use the 2.5Gb), the Wi-Fi is disabled, but the DNS retains both addresses for the netbios name.

[root@ipfire ~]# unbound-control list_local_data | grep matebook
matebook.pscar.dynu.com.        60      IN      A       192.168.20.49
matebook.pscar.dynu.com.        60      IN      A       192.168.20.47
47.20.168.192.in-addr.arpa.     60      IN      PTR     matebook.pscar.dynu.com.
49.20.168.192.in-addr.arpa.     60      IN      PTR     matebook.pscar.dynu.com.

[root@ipfire ~]# host matebook
matebook.pscar.dynu.com has address 192.168.20.49
matebook.pscar.dynu.com has address 192.168.20.47

[root@ipfire ~]# unbound-control list_local_data | grep 20.47
huaweimbWifi.pscar.dynu.com.    60      IN      A       192.168.20.47
matebook.pscar.dynu.com.        60      IN      A       192.168.20.47

[root@ipfire ~]# unbound-control list_local_data | grep 20.49
huaweimb.pscar.dynu.com.        60      IN      A       192.168.20.49
matebook.pscar.dynu.com.        60      IN      A       192.168.20.49

Edit: If I don’t apply this rule, my laptop ends up with the 3 names in the DNS including the duplicate netbios name
If I put the same name on my PC and in /var/ipfire/main/hosts I always have both IP addresses (wifi and fixed) with this name in the DNS