The modules file is used when LOAD_HELPERS_ONLY=No in m[blue]shorewall.confm(8); the helpers file is used when LOAD_HELPERS_ONLY=Yes
Beginning with Shorewall 5.2.3, the LOAD_HELPERS_ONLY option has been removed and the behavior is the same as if LOAD_HELPERS_ONLY=Yes was specified.
Each record in the files has the following format:
The /usr/share/shorewall/modules file contains a large number of modules. Users are encouraged to copy the file to /etc/shorewall/modules and modify the copy to load only the modules required or to use LOAD_HELPERS_ONLY=Yes..if n
If you build monolithic kernels and have not installed module-init-tools, then create an empty /etc/shorewall/modules file; that will prevent Shorewall from trying to load modules at all.