DragonFlyBSD

Nelson H. F. Beebe suggested the following improvement to the installer:

(1) Many users will have IPv4 address w.x.y.z, where only the last
octet changes in their enviroment. It would be nice if the
installer portion where a manual IPv4 configuration is done to
offer w.x.y.1 as defaults for the router and gateway addresses,
and 255.255.255.0 as the default network mask. I have used
installers for other O/Ses that do just that. Numeric addresses
are easy to make typing mistakes in, and providing sensible
defaults is most helpful. Typos in those addresses result in loss
of the network, and can sometimes be hard to spot.

From: https://lists.dragonflybsd.org/pipermail/users/2025-May/452476.html