When you create a filter, you need to define the IP addresses or ranges you want the filter to affect. An IP address consists of four numbers between 0 and 255, separated by dots (.).

You can use asterisks as "wild cards" to represent a range of IP addresses. For example, "111.222.3.***" indicates all computers with addresses that begin with 111.222.3.

Because the numbers in IP addresses go from general to specific (for example, the first number might belong to the computers in a whole company, whereas the last number might belong only to the computers on one floor of a building), asterisks cannot precede numbers in an address.

Correct:

111.123.***.***

111.1*.***.***

Incorrect:

11.***.123.***

***.11.222.3

The following list indicates the ranges of numbers represented by different wild card/number combinations in a segment of an IP address.

	Wild card combination		Range represented
	*		0–255
	**		0–255
	***		0–255
	0*		0–9
	0**		0–99
	1*		10–19
	1**		100–199
	2*		20–29
	2**		200–255
	3*		30–39
	4*		40–49