Added note to add ", chain=DOCKER-USER" to the fail2ban jail action if using docker networks

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Added note to add ", chain=DOCKER-USER" to the fail2ban jail action if using docker networks #1175

Closed Measurity closed 1 month ago

Measurity commented 2 months ago

By default, the jail action chain is "INPUT", but "FORWARD" is used when using docker networks. "DOCKER-USER", available when using docker, is part of the "FORWARD" chain. Hence the note to use "DOCKER-USER".