SELinux is preventing firewalld from relabelto access on the file ifcfg-enp3s0.bak.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that firewalld should be allowed relabelto access on the ifcfg-enp3s0.bak file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'firewalld' --raw | audit2allow -M my-firewalld
# semodule -X 300 -i my-firewalld.pp

Additional Information:
Source Context                system_u:system_r:firewalld_t:s0
Target Context                unconfined_u:object_r:net_conf_t:s0
Target Objects                ifcfg-enp3s0.bak [ file ]
Source                        firewalld
Source Path                   firewalld
Port                          <Unknown>
Host                          jean.localdomain
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-259.fc26.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     jean.localdomain
Platform                      Linux jean.localdomain 4.11.8-300.fc26.x86_64 #1
                              SMP Thu Jun 29 20:09:48 UTC 2017 x86_64 x86_64
Alert Count                   1
First Seen                    2017-07-16 18:57:14 PDT
Last Seen                     2017-07-16 18:57:14 PDT
Local ID                      1f786cc6-0e9e-47b0-93c3-4d166784df47

Raw Audit Messages
type=AVC msg=audit(1500256634.945:22797596): avc:  denied  { relabelto } for  pid=914 comm="firewalld" name="ifcfg-enp3s0.bak" dev="dm-0" ino=418716 scontext=system_u:system_r:firewalld_t:s0 tcontext=unconfined_u:object_r:net_conf_t:s0 tclass=file permissive=0


Hash: firewalld,firewalld_t,net_conf_t,file,relabelto