SELinux is preventing /usr/bin/gok from 'read' accesses on the directory /var/yp.

*****  Plugin catchall_boolean (89.3 confidence) suggests  *******************

If you want to allow system to run with NIS
Then you must tell SELinux about this by enabling the 'allow_ypbind' boolean.
Do
setsebool -P allow_ypbind 1

*****  Plugin catchall (11.6 confidence) suggests  ***************************

If you believe that gok should be allowed read access on the yp directory 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 gok /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:xdm_t:s0-s0:c0.c1023
Target Context                system_u:object_r:var_yp_t:s0
Target Objects                /var/yp [ dir ]
Source                        gok
Source Path                   /usr/bin/gok
Port                          <未知>
Host                          (removed)
Source RPM Packages           gok-2.30.0-1.fc14
Target RPM Packages           filesystem-2.4.35-1.fc14
Policy RPM                    selinux-policy-3.9.7-20.fc14
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 2.6.35.10-74.fc14.x86_64 #1 SMP
                              Thu Dec 23 16:04:50 UTC 2010 x86_64 x86_64
Alert Count                   2
First Seen                    2011年01月21日 星期五 11时06分03秒
Last Seen                     2011年01月21日 星期五 11时06分11秒
Local ID                      35e59bf2-d32c-4ded-92c2-b2cdc3d4c217

Raw Audit Messages
type=AVC msg=audit(1295579171.616:15): avc:  denied  { read } for  pid=1743 comm="gok" name="yp" dev=dm-0 ino=1677 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_yp_t:s0 tclass=dir

gok,xdm_t,var_yp_t,dir,read
type=SYSCALL msg=audit(1295579171.616:15): arch=x86_64 syscall=open success=no exit=EACCES a0=7fc37800a110 a1=0 a2=3c8430ea68 a3=1 items=0 ppid=1 pid=1743 auid=4294967295 uid=42 gid=42 euid=42 suid=42 fsuid=42 egid=42 sgid=42 fsgid=42 tty=(none) ses=4294967295 comm=gok exe=/usr/bin/gok subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 key=(null)
gok,xdm_t,var_yp_t,dir,read

#============= xdm_t ==============
#!!!! This avc can be allowed using the boolean 'allow_ypbind'

allow xdm_t var_yp_t:dir read;