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Whatmask is a small C program that lets you easily convert between three common
subnet mask notations.
Notations supported:
Name Example
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CIDR /24
Netmask 255.255.255.0
Wilcard Bits 0.0.0.255
The above notations are all identical. CIDR notation commonly has a "/" in
front of the number (representing the number of bits). Whatmask can accept
these notations with or without a slash. This notation is used more and more
recently. A lot of popular routers and software supprt this notation.
Netmask notation is pretty much the standard old-school way of doing it. It is
supported by most systems (Un*x, Win, Mac, etc.).
Wilcard bits are similar to the netmask, but they are the logical not of the
netmask. This notation is used by a number of popular routers.
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