Grafana dashboard: Fail2ban
Description: Add fail2ban graph for ssh, purftp, dovecot, postfix

Show metrics for:
* ssh
* purftp
* dovecot pop3imap
* postfix sasl

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  "schemaVersion": 16,
  "style": "dark",
  "tags": [],
  "templating": {
    "list": []
  },
  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "timepicker": {
    "refresh_intervals": [
      "5s",
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    "time_options": [
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      "6h",
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  "timezone": "",
  "title": "Fail2ban",
  "uid": "uTWqKmQmk",
  "version": 5,
  "description": "Add fail2ban graph for ssh, purftp, dovecot, postfix"
}