If you have a large installation, you may
find that you have a bunch of computers all on the same local network
that require access to your server.
There are a few ways of simplifying references to large
numbers of machines.
First, you can give access to a range of machines at
once by specifying a network and a netmask.
For example, if you wanted to allow access to
all the machines with IP addresses between 192.168.0.0 and
192.168.0.255 then you could have the entries: