Reply To: Use of class B address on Asus router I am having difficulty changing my router’s ip address to a class b address i.e. 172.18.x.x, this being both more secure (less likely to guess) and legitimate as it falls…

[Grisu]

If someone can enter your network on LAN he will automatically get an IP from DHCP of your modem and so he will know the subnet as well.
This really makes no sense, not to me nor to others working with networks.

That is why most users (>>99%) will use what modem sets by default.
Some operators like mine for example use 10.0.0.x (but only reason for that because for business customers they need larger subnets).

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