It is not possible to include
nf_nat_ftp module into firewalld configuration.
According to a manual page
man firewall-cmd modules are expected to be included using mentioned syntax:
--permanent --service=service --add-module=module Add a new module to the permanent service.
but including of
nf_nat_ftp kernel module for ftp service using mentioned syntax leads to the following error :
Error: INVALID_MODULE: nf_nat_ftp
As the result, netfilter modules couldn't be loaded automatically after complete reload or restart of firewalld service.
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