Description of problem:
SELinux is preventing /usr/bin/Xephyr from 'connectto' accesses on the unix_stream_socket @/tmp/.X11-unix/X0.

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

If 您确定应默认允许 Xephyr connectto 访问 X0 unix_stream_socket。
Then 您应该将这个情况作为 bug 报告。
您可以生成本地策略模块允许这个访问。
Do
请执行以下命令此时允许这个访问：
# grep Xephyr /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:sandbox_x_t:s0:c170,c571
Target Context                system_u:system_r:xserver_t:s0-s0:c0.c1023
Target Objects                @/tmp/.X11-unix/X0 [ unix_stream_socket ]
Source                        Xephyr
Source Path                   /usr/bin/Xephyr
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           xorg-x11-server-Xephyr-1.16.1-1.fc21.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-99.fc21.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.17.4-301.fc21.x86_64 #1 SMP Thu
                              Nov 27 19:09:10 UTC 2014 x86_64 x86_64
Alert Count                   1
First Seen                    2014-12-06 19:48:27 CST
Last Seen                     2014-12-06 19:48:27 CST
Local ID                      de4dcb79-73e2-4ced-90cc-97bc28f44ccb

Raw Audit Messages
type=AVC msg=audit(1417866507.862:364): avc:  denied  { connectto } for  pid=3677 comm="Xephyr" path=002F746D702F2E5831312D756E69782F5830 scontext=unconfined_u:unconfined_r:sandbox_x_t:s0:c170,c571 tcontext=system_u:system_r:xserver_t:s0-s0:c0.c1023 tclass=unix_stream_socket permissive=0


type=SYSCALL msg=audit(1417866507.862:364): arch=x86_64 syscall=connect success=no exit=EACCES a0=0 a1=7fffd04e6b70 a2=14 a3=7fffd04e6b73 items=0 ppid=3668 pid=3677 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 tty=(none) ses=1 comm=Xephyr exe=/usr/bin/Xephyr subj=unconfined_u:unconfined_r:sandbox_x_t:s0:c170,c571 key=(null)

Hash: Xephyr,sandbox_x_t,xserver_t,unix_stream_socket,connectto

Version-Release number of selected component:
selinux-policy-3.13.1-99.fc21.noarch

Additional info:
reporter:       libreport-2.3.0
hashmarkername: setroubleshoot
kernel:         3.17.4-302.fc21.x86_64
type:           libreport

Potential duplicate: bug 1105652