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About Scan Targets

You can specify the targets of a scan using a number of different formats. The following table explains target types, examples, and a short explanation of what occurs when that target type is scanned.

Target Description

Example

Explanation

A single IPv4 address

192.168.0.1

Scans the single IPv4 address.

A single IPv6 address

2001:db8::2120:17ff:fe56:333b

Scans the single IPv6 address.

A single link local IPv6 address with a scope identifier

fe80:0:0:0:216:cbff:fe92:88d0%eth0

Scans the single IPv6 address. Note that you must use interface indexes, not interface names, for the scope identifier on Windows platforms.

An IPv4 range with a start and end address

192.168.0.1-192.168.0.255

Scans all IPv4 addresses between the start address and end address, including both addresses.

An IPv4 address with one or more octets replaced with numeric ranges

192.168.0-1.3-5

Scans all combinations of the values given in the octet ranges. In this example, scans: 192.168.0.3, 192.168.0.4, 192.168.0.5, 192.168.1.3, 192.168.1.4 and 192.168.1.5.

An IPv4 subnet with CIDR notation

192.168.0.0/24

Scans all addresses within the specified subnet. The address given is not the start address. Specifying any address within the subnet with the same CIDR scans the same set of hosts.

An IPv4 subnet with netmask notation

192.168.0.0/255.255.255.128

Scans all addresses within the specified subnet. The address is not a start address. Specifying any address within the subnet with the same netmask scans the same hosts.

A host resolvable to either an IPv4 or an IPv6 address

www.yourdomain.com

Scans the single host. If the hostname resolves to multiple addresses the address to scan is the first IPv4 address or if it did not resolve to an IPv4 address, the first IPv6 address.

A host resolvable to an IPv4 address with CIDR notation

www.yourdomain.com/24

The hostname is resolved to an IPv4 address and then treated like any other IPv4 address with CIDR target.

A host resolvable to an IPv4 address with netmask notation

www.yourdomain.com/255.255.252.0

The hostname is resolved to an IPv4 address and then treated like any other IPv4 address with netmask notation.

The text 'link6' optionally followed by an IPv6 scope identifier

link6 or link6%16

Scans all hosts that respond to multicast ICMPv6 echo requests sent out on the interface specified by the scope identifier to the ff02::1 address. If no IPv6 scope identifier is given, the requests are sent out on all interfaces. Note that you must use interface indexes, not interface names, for the scope identifier on Windows platforms.

Some text with either a single IPv4 or IPv6 address within square brackets

"Test Host 1[10.0.1.1]" or "Test Host 2[2001:db8::abcd]"

Scans the IPv4 or IPv6 address within the brackets, like a normal single target.

Tip: Hostname targets that look like either a link6 target (start with the text "link6") or like one of the two IPv6 range forms can be forcibly processed as a hostname by putting single quotes around the target.

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