Entering an IP Address Range

You can enter IP address ranges in several ways, depending on what you need to do. These ranges are useful for configuring access in the Intermapper firewall, as well as for autodiscovery.

Valid Characters

  • Use hyphens (-) to separate high and low values.
  • Use wildcards (*) to indicate a full range of values.
  • Use slashes (/) to enter a range in CIDR notation.

Examples

  • Address range using hyphens
    • 192.168.1.1-31 - specifies any device in the range 192.168.1.1 to 192.168.1.31.
    • 192.168.1-10.1-10 - specifies in subnets 192.168.1.* to 192.168.10.* and finds addresses between 1 and 10 within each subnet.
  • Address range using "*" wildcards
    • Each wildcard corresponds to a range of 0-255.
    • 192.168.1.* -equivalent to 192.168.1.1-255.
    • 192.168.*.* - class B range.
    • *.*.*.* - all addresses.
  • Address range using wildcards and hyphens
    • 192.168.1-10.* - finds 255 addresses in each of 10 subnets.
    • 192.168.*.1 - finds address #1 in each of 255 subnets.
  • Address range using CIDR ("slash") notation defines length in bits. This is often referred to as prefix length or prefix bits.
    • 192.168.0.0/24 - equivalent to 192.168.0.* Class C.
    • 192.168.0.0/16 - equivalent to 192.168.*.* Class B.
    • 192.168.1.128/25 - equivalent to 192.168.1.128-255.
    • example.com/24 - the last 255 addresses at example.com (Class C)
    • example.com/25 - 126 addresses beginning with either 1 or 129, depending on the value of the last octet of the IP address for example.com.