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147 lines
3.5 KiB
Text
147 lines
3.5 KiB
Text
---
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title: About the port Resource
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platform: os
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---
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# port
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Use the `port` InSpec audit resource to test basic port properties, such as port, process, if it's listening.
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<br>
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## Availability
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### Installation
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This resource is distributed along with InSpec itself. You can use it automatically.
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### Version
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This resource first became available in v1.0.0 of InSpec.
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## Syntax
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A `port` resource block declares a port, and then depending on what needs to be tested, a process, protocol, process identifier, and its state (is it listening?):
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describe port(514) do
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it { should be_listening }
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its('processes') {should include 'syslog'}
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end
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where the `processes` returns the processes listening on port 514.
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A filter may specify an attribute:
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describe port.where { protocol =~ /tcp/ && port > 22 && port < 80 } do
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it { should_not be_listening }
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end
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where
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* `.where{}` specifies a block in which one (or more) attributes---`port`, `address`, `protocol`, `process`, `pid`, or `listening?`----scope the test to ports that match those attributes
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For example, to test if the SSH daemon is available on a Linux machine via the default port (22):
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describe port(22) do
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its('processes') { should include 'sshd' }
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its('protocols') { should include 'tcp' }
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its('addresses') { should include '0.0.0.0' }
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end
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<br>
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## Examples
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The following examples show how to use this InSpec audit resource.
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### Test port 80, listening with the TCP protocol
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describe port(80) do
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it { should be_listening }
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its('protocols') { should cmp 'tcp' }
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end
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### Test port 80, on a specific address
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A specific port address may be checked using either of the following examples:
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describe port(80) do
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it { should be_listening }
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its('addresses') {should include '0.0.0.0'}
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end
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or:
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describe port('0.0.0.0', 80) do
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it { should be_listening }
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end
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### Test port 80, listening with TCP version IPv6 protocol
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describe port(80) do
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it { should be_listening }
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its('protocols') { should cmp 'tcp6' }
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end
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### Test that only secure ports accept requests
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describe port(80) do
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it { should_not be_listening }
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end
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describe port(443) do
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it { should be_listening }
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its('protocols') { should cmp 'tcp' }
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end
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### Verify port 65432 is not listening
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describe port(22) do
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it { should be_listening }
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its('protocols') { should include('tcp') }
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its('protocols') { should_not include('udp') }
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end
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describe port(65432) do
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it { should_not be_listening }
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end
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<br>
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## Matchers
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For a full list of available matchers, please visit our [matchers page](https://www.inspec.io/docs/reference/matchers/).
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### address
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The `addresses` matcher tests if the specified address is associated with a port:
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its('addresses') { should include '0.0.0.0' }
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### be_listening
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The `be_listening` matcher tests if the port is listening for traffic:
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it { should be_listening }
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### pids
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The `pids` matcher tests the process identifiers (PIDs):
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its('pids') { should cmp 27808 }
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### processes
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The `processes` matcher tests if the named process is running on the system:
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its('processes') { should cmp 'syslog' }
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### protocols
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The `protocols` matcher tests the Internet protocol: ICMP (`'icmp'`), TCP (`'tcp'` or `'tcp6'`), or UDP (`'udp'` or `'udp6'`):
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its('protocols') { should include 'tcp' }
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or for the IPv6 protocol:
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its('protocols') { should include 'tcp6' }
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