refactor: Test remove jinja2 from var_network_filtering_service.var

[AlexXuan233]

Description:

Test remove jinja2 from var_network_filtering_service.var

Rationale:

Do it for trestle-bot

Review Hints:

Check all reference of var_network_filtering_service.var

[AlexXuan233]

@marcusburghardt Updated. Can you help take a look again. Currently no ubuntu product use default option, but should we add a comment like i do in this PR. To let users know ubuntu default use nftables

[marcusburghardt]

@marcusburghardt Updated. Can you help take a look again. Currently no ubuntu product use default option, but should we add a comment like i do in this PR. To let users know ubuntu default use nftables

Great. For more context, every variable has a default value that is used when the variable is not explicitly defined in control files or profiles. In this case, if any rule using this variable is defined in a Ubuntu control file or profile, but the variable is not explicitly defined using the "nftables" option, the rule will use the default (firewalld) and will likely fail.

The last version of Ubuntu is also using the STIG control file, which does not include the variable. We should also define the variable var_network_filtering_service=nftables in https://github.com/ComplianceAsCode/content/blob/master/controls/stig_ubuntu2404.yml .

Once the PR is opened, we can ask Ubuntu maintainers to review and inform if we also need to set this variable in profiles used by older versions not using control files.

[AlexXuan233]

@marcusburghardt Updated. Can you help take a look again. Currently no ubuntu product use default option, but should we add a comment like i do in this PR. To let users know ubuntu default use nftables

Great. For more context, every variable has a default value that is used when the variable is not explicitly defined in control files or profiles. In this case, if any rule using this variable is defined in a Ubuntu control file or profile, but the variable is not explicitly defined using the "nftables" option, the rule will use the default (firewalld) and will likely fail.

The last version of Ubuntu is also using the STIG control file, which does not include the variable. We should also define the variable var_network_filtering_service=nftables in https://github.com/ComplianceAsCode/content/blob/master/controls/stig_ubuntu2404.yml .

Once the PR is opened, we can ask Ubuntu maintainers to review and inform if we also need to set this variable in profiles used by older versions not using control files.

@marcusburghardt Thanks for your review again. I think you mean add var_network_filtering_service=nftables in https://github.com/ComplianceAsCode/content/blob/master/products/ubuntu2404/profiles/stig.profile , which refer stig_ubuntu2404.yml, am i understand correctly or not.

By the way, do you think we should open one PR to remove all Jinja2 from all var file or one PR per var file.

[AlexXuan233]

Some kind of var file is more complex, example : https://github.com/ComplianceAsCode/content/blob/master/linux_os/guide/system/accounts/accounts-banners/login_banner_text.var . @marcusburghardt Do you have any suggestions how to remove Jinja2 from this kind var file.