/usr/share/fwbuilder-5.1.0.3599/configlets/linux24/script_body_iptables_shell is in fwbuilder-common 5.1.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | ## -*- mode: shell-script; -*-
##
## To be able to make changes to the part of configuration created
## from this configlet you need to copy this file to the directory
## fwbuilder/configlets/linux24/ in your home directory and modify it.
## Double "##" comments are removed during processing but single "#"
## comments are be retained and appear in the generated script. Empty
## lines are removed as well.
##
## Configlets support simple macro language with these constructs:
## {{$var}} is variable expansion
## {{if var}} is conditional operator.
##
## this template is used for single rule compile, both
## iptables-restore and regular, as well as for the regular
## (not iptables-restore) script
{{if auto}}{{$filter_auto_script}}
{{$mangle_auto_script}}{{endif}}
{{if nat}}{{$nat_script}}{{endif}}
{{if mangle}}{{$mangle_script}}{{endif}}
{{if filter}}{{$filter_script}}{{endif}}
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