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alpine: set up firewall

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Get services from NetBox and enable SSH unconditionally for now.
This commit is contained in:
Timotej Lazar 2024-06-05 15:37:45 +02:00
parent b3aff08ce3
commit fe6c35edf1
3 changed files with 42 additions and 0 deletions
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24
roles/alpine/templates/local.nft.j2 Normal file
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table inet filter {
chain input {
tcp dport ssh accept
{% for service in services %}
{% set prefixes = service | allowed_prefixes %}
{% set prefixes4 = prefixes | selectattr('family.value', '==', 4) | map('string') %}
{% set prefixes6 = prefixes | selectattr('family.value', '==', 6) | map('string') %}
{% set ports = service.ports | compact_numlist %}
# service {{ service.name }}
{% if prefixes4 or prefixes6 %}
{% if prefixes4 %}
ip saddr { {{ prefixes4 | join(', ') }} } tcp dport { {{ ports }} } accept
{% endif %}
{% if prefixes6 %}
ip6 saddr { {{ prefixes6 | join(', ') }} } tcp dport { {{ ports }} } accept
{% endif %}
{% else %}
tcp dport { {{ ports }} } accept
{% endif %}
{% endfor %}
}
}