Description of problem:
launched Networkmanager by hand as there was something buggy about network management in F20 alpha, updates-testing enabled. « Les services réseau du système ne sont pas compatibles avec cette version. » in french, gnome paramaters, network. Should be something like « Network services are not compatible with this version. »
Once NM launched (and properly gavec me network access, wifi and eth were both non functionnal before that), I got this SELinux alert.
SELinux is preventing /usr/libexec/nm-dhcp-helper from 'connectto' accesses on the unix_stream_socket /run/NetworkManager/private-dhcp.

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

If vous pensez que nm-dhcp-helper devrait être autorisé à accéder connectto sur private-dhcp unix_stream_socket par défaut.
Then vous devriez rapporter ceci en tant qu'anomalie.
Vous pouvez générer un module de stratégie local pour autoriser cet accès.
Do
autoriser cet accès pour le moment en exécutant :
# grep nm-dhcp-helper /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:system_r:dhcpc_t:s0-s0:c0.c1023
Target Context                unconfined_u:system_r:unconfined_t:s0-s0:c0.c1023
Target Objects                /run/NetworkManager/private-dhcp [
                              unix_stream_socket ]
Source                        nm-dhcp-helper
Source Path                   /usr/libexec/nm-dhcp-helper
Port                          <Inconnu>
Host                          (removed)
Source RPM Packages           NetworkManager-0.9.9.0-13.git20131001.fc20.i686
Target RPM Packages           
Policy RPM                    selinux-policy-3.12.1-84.fc20.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.11.2-301.fc20.i686 #1 SMP Fri
                              Sep 27 20:09:07 UTC 2013 i686 i686
Alert Count                   1
First Seen                    2013-10-05 08:57:27 CEST
Last Seen                     2013-10-05 08:57:27 CEST
Local ID                      e67d6d42-4907-4ee8-a7ec-df467c7885d5

Raw Audit Messages
type=AVC msg=audit(1380956247.418:496): avc:  denied  { connectto } for  pid=2617 comm="nm-dhcp-helper" path="/run/NetworkManager/private-dhcp" scontext=unconfined_u:system_r:dhcpc_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:unconfined_t:s0-s0:c0.c1023 tclass=unix_stream_socket


type=SYSCALL msg=audit(1380956247.418:496): arch=i386 syscall=socketcall success=no exit=EACCES a0=3 a1=bfd4e1b0 a2=b7732000 a3=bfd4e1de items=0 ppid=2615 pid=2617 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=1 tty=(none) comm=nm-dhcp-helper exe=/usr/libexec/nm-dhcp-helper subj=unconfined_u:system_r:dhcpc_t:s0-s0:c0.c1023 key=(null)

Hash: nm-dhcp-helper,dhcpc_t,unconfined_t,unix_stream_socket,connectto

Additional info:
reporter:       libreport-2.1.7
hashmarkername: setroubleshoot
kernel:         3.11.2-301.fc20.i686
type:           libreport