Let them stay together. In the last YEARS, I have seen quite often that users, when installing a product such as PXC, instead of spending five minutes to understand what to do just run [crayon-5b286a52c77b0634119669-i/]  and save. In short, they remove any rules for their firewall. With this post, I want to show you how [&]

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https://www.percona.com/blog/2018/06/12/pxc-loves-firewalls-system-admins-loves-iptables/