Added 'host' option to firewall configuration
merged branch pkruithof/firewall-host-option (PR #8905)

This PR was merged into the master branch.

Discussion
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Added 'host' option to firewall configuration

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7103
| License       | MIT
| Doc PR        |

This is a follow-up of #8880.

Commits
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94d648b Added 'host' option to firewall configuration