CentOS - Jan 2021 - Restore pristine SELinux configuration ?

Hi,

I have CentOS 7 running on a public server hosting all sorts of web
applications, mail, XMPP, MPD, etc.

How do I reset SELinux configuration to defaults?

I know how to reset all my custom booleans to the initial state.

  # cat /etc/selinux/targeted/active/booleans.local
  # This file is auto-generated by libsemanage
  # Do not edit directly.

  httpd_unified=1
  httpd_can_sendmail=1
  spamd_enable_home_dirs=1
  httpd_can_network_connect=1
  ftpd_full_access=1
  mpd_enable_homedirs=1
  named_write_master_zones=1

Starting from there, I can manually reset them to 0 with setsebool.

On the other hand, I don't know how I would do something similar with the
SELinux modules. I vaguely remember having created some of these, for example
for Fail2ban to work correctly. But I don't remember what I did here over
the
years, what modules I created, etc.

How would I recreate the default SELinux configuration without having to wipe
and reinstall the whole server?

Cheers,

Niki
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Am 19.01.21 um 17:25 schrieb Nicolas Kovacs:
> Hi,
> 
> I have CentOS 7 running on a public server hosting all sorts of web
> applications, mail, XMPP, MPD, etc.
> 
> How do I reset SELinux configuration to defaults?
> 
> I know how to reset all my custom booleans to the initial state.
> 
>    # cat /etc/selinux/targeted/active/booleans.local
>    # This file is auto-generated by libsemanage
>    # Do not edit directly.
> 
>    httpd_unified=1
>    httpd_can_sendmail=1
>    spamd_enable_home_dirs=1
>    httpd_can_network_connect=1
>    ftpd_full_access=1
>    mpd_enable_homedirs=1
>    named_write_master_zones=1
> 
> Starting from there, I can manually reset them to 0 with setsebool.
> 
> On the other hand, I don't know how I would do something similar with
the
> SELinux modules. I vaguely remember having created some of these, for
example
> for Fail2ban to work correctly. But I don't remember what I did here
over the
> years, what modules I created, etc.
> 
> How would I recreate the default SELinux configuration without having to
wipe
> and reinstall the whole server?
list your modules with

semodule -l

and remove custom modules with

semodule -r myfail2ban

--
Leon