A collection for portscan detection via iptables/nftables :

• iptables/nftables parser (like in -j LOG)
• multi port scan detection

Example acquisition for this collection :

filenames:
  - /var/log/kern.log
labels:
  type: syslog

Debian 12 example (without rsyslog)

source: journalctl
journalctl_filter:
 - "-k"
labels:
  type: syslog

notes :

• Depending on your distribution/OS, paths to log files might change
• Only relevant if you are manually installing collection