Description of problem:
SELinux is preventing yum from 'name_connect' accesses on the tcp_socket port 54748.

*****  Plugin catchall_boolean (47.5 confidence) suggests   ******************

If you want to allow nis to enabled
Then you must tell SELinux about this by enabling the 'nis_enabled' boolean.
You can read 'None' man page for more details.
Do
setsebool -P nis_enabled 1

*****  Plugin catchall_boolean (47.5 confidence) suggests   ******************

If you want to allow docker to connect any
Then you must tell SELinux about this by enabling the 'docker_connect_any' boolean.
You can read 'None' man page for more details.
Do
setsebool -P docker_connect_any 1

*****  Plugin catchall (6.38 confidence) suggests   **************************

If you believe that yum should be allowed name_connect access on the port 54748 tcp_socket 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:
# grep yum /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:docker_t:s0
Target Context                system_u:object_r:ephemeral_port_t:s0
Target Objects                port 54748 [ tcp_socket ]
Source                        yum
Source Path                   yum
Port                          54748
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-105.1.fc21.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.18.5-201.fc21.x86_64 #1 SMP Mon
                              Feb 2 21:00:58 UTC 2015 x86_64 x86_64
Alert Count                   1
First Seen                    2015-02-11 13:28:55 PST
Last Seen                     2015-02-11 13:28:55 PST
Local ID                      643e1c10-bd4d-40e8-8d30-f0a5ad9d022a

Raw Audit Messages
type=AVC msg=audit(1423690135.215:588): avc:  denied  { name_connect } for  pid=6583 comm="yum" dest=54748 scontext=system_u:system_r:docker_t:s0 tcontext=system_u:object_r:ephemeral_port_t:s0 tclass=tcp_socket permissive=1


Hash: yum,docker_t,ephemeral_port_t,tcp_socket,name_connect

Version-Release number of selected component:
selinux-policy-3.13.1-105.1.fc21.noarch

Additional info:
reporter:       libreport-2.3.0
hashmarkername: setroubleshoot
kernel:         3.18.5-201.fc21.x86_64
type:           libreport