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72 lines
1.5 KiB
Text
72 lines
1.5 KiB
Text
---
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title: About the kernel_parameter Resource
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---
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# kernel_parameter
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Use the `kernel_parameter` InSpec audit resource to test kernel parameters on Linux platforms.
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## Syntax
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A `kernel_parameter` resource block declares a parameter and then a value to be tested:
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describe kernel_parameter('path.to.parameter') do
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its('value') { should eq 0 }
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end
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where
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* `'kernel.parameter'` must specify a kernel parameter, such as `'net.ipv4.conf.all.forwarding'`
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* `{ should eq 0 }` states the value to be tested
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## Matchers
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This InSpec audit resource has the following matchers:
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### be
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<%= partial "/shared/matcher_be" %>
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### cmp
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<%= partial "/shared/matcher_cmp" %>
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### eq
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<%= partial "/shared/matcher_eq" %>
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### include
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<%= partial "/shared/matcher_include" %>
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### match
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<%= partial "/shared/matcher_match" %>
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### value
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The `value` matcher tests the value assigned to the named IP address versus the value declared in the test:
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its('value') { should eq 0 }
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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 if global forwarding is enabled for an IPv4 address
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describe kernel_parameter('net.ipv4.conf.all.forwarding') do
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its('value') { should eq 1 }
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end
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### Test if global forwarding is disabled for an IPv6 address
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describe kernel_parameter('net.ipv6.conf.all.forwarding') do
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its('value') { should eq 0 }
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end
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### Test if an IPv6 address accepts redirects
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describe kernel_parameter('net.ipv6.conf.interface.accept_redirects') do
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its('value') { should eq 'true' }
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end
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