Eset populates the DNS suffix with whatever is established for connection-specific DNS suffix value established by DHCP initialization as I posted previously. You can determine the current connection-specific DNS suffix value by opening a command prompt window and entering the following:
ipconfig /all
Under each network adapter connection section in the display, note the value shown for connection-specific DNS suffix value :
Above is shown DNS suffix assigned via my router and ISP for my Ethernet network connection.
Note that the "lan" value you are observing is being assigned the same way. Eset is only populating its corresponding network connection fields with data received from your router/ISP.
