Provides an exporter for Prometheus, to collect DNSBL-informations of several DNSBL-providers.
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README.adoc

= DNSBL exporter

Provides an exporter to scan known DNSBL-providers for listing of target-IP.

== Installation

1. You have to installed `ruby` and `bundler`:
+
[source,sh]
----
apt install ruby
gem install bundler
----

2. Clone the repository to the destination, you want to have installed dnsbl_exporter.

3. Copy `config.yml.example` to `config.yml` and change settings like resolver.

4. Start on boot:
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[source,sh]
----
useradd prometheus
sudo -u prometheus bundle install
erb dnsbl_exporter.service.erb > /etc/systemd/system/dnsbl_exporter.service
systemctl daemon-reload
systemctl enable --now dnsbl_exporter.service
----

5. In prometheus, define the target-IP as `target`-param.
+
[source,yaml]
----
- job_name: dnsbl4
static_configs:
- targets:
- '1.2.3.4'
- '1234::abcd'
relabel_configs:
- source_labels: [__address__]
target_label: __param_target
replacement: '${1}'
- source_labels: [__param_target]
target_label: instance
- target_label: __address__
replacement: {{prometheus_jobs_dnsbl_target}}
----