connecting to digikam mariadb host from two different subnet

[leoutation at gmx.fr]

Hi
I use Digikam/Mariadb with address/static/hostname like 192.168.2.xx on 
local ethernet network, in same computer subnet. It runs fine when 
connecting from two machines in same subnet.
When using wireless/static address on a computer,  subnet is different, 
computer address is now 192.168.3.xx
So, I'm unable to connect to digikam db , hostname 192.168.2.xx now when 
using wireless
Is there a way to configure digikam and/or mariadb to connect to same 
digikam mariadb hostname from different subnet ?
Thanks