Paul Howarth wrote:
Chris Jones wrote:
Paul Howarth wrote:
Chris Jones wrote:
Paul Howarth wrote:
On Sun, 2006-06-25 at 23:16 +0100, Chris Jones wrote:
I am using FC5 on a generic Athlon x64 PC. I am having problems
with several services.
1. Dovecot refuses to start. When I attempt to start the service
I get a message in /var/log/messages as follows:
Jun 25 23:05:38 bilbo kernel: audit(1151273138.255:415): avc:
denied { create } for pid=1480 comm="dovecot"
scontext=user_u:system_r:dovecot_t:s0
tcontext=user_u:system_r:dovecot_t:s0 tclass=socket
Can anyone here give me a hint on what I need to do to get this
working? >From the log message, this seems to be something to do
with selinux.
Indeed it is. Some more diagnostic info would be useful. Can you post
the output of:
# ausearch -a 415
produces the output >
[root@bilbo network-scripts]# ausearch -a 415
-bash: ausearch: command not found
Clearly, I am missing this application. Where should it be? Which RPM?
It's in the "audit" package.
Now when I run this, I get the following response:>
[root@bilbo network-scripts]# ausearch -a 415
<no matches>
Have you rebooted since the error happened?
Try this instead:
# fgrep 1151273138.255:415 /var/log/messages
Results in:
Jun 25 23:05:38 bilbo kernel: audit(1151273138.255:415): avc: denied {
create } for pid=1480 comm="dovecot"
scontext=user_u:system_r:dovecot_t:s0
tcontext=user_u:system_r:dovecot_t:s0 tclass=socket
Which is the last time I tried to start dovecot yesterday.
Having started the auditd service and then tried to start dovecot, I see
the following in the audit log file:>
type=AVC msg=audit(1151335194.177:97): avc: denied { create } for
pid=7668 comm="dovecot" scontext=user_u:system_r:dovecot_t:s0
tcontext=user_u:system_r:dovecot_t:s0 tclass=socket
type=SYSCALL msg=audit(1151335194.177:97): arch=c000003e syscall=41
success=no exit=-13 a0=0 a1=1 a2=0 a3=521040 items=0 pid=7668
auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0
comm="dovecot" exe="/usr/sbin/dovecot"
type=AVC msg=audit(1151335246.188:98): avc: denied { create } for
pid=7682 comm="dovecot" scontext=user_u:system_r:dovecot_t:s0
tcontext=user_u:system_r:dovecot_t:s0 tclass=socket
type=SYSCALL msg=audit(1151335246.188:98): arch=c000003e syscall=41
success=no exit=-13 a0=0 a1=1 a2=0 a3=521040 items=0 pid=7682
auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0
comm="dovecot" exe="/usr/sbin/dovecot"
and a call to ausearch -a 98 gives:>
[root@bilbo audit]# ausearch -a 98
----
time->Mon Jun 26 16:20:46 2006
type=SYSCALL msg=audit(1151335246.188:98): arch=c000003e syscall=41
success=no exit=-13 a0=0 a1=1 a2=0 a3=521040 items=0 pid=7682
auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0
comm="dovecot" exe="/usr/sbin/dovecot"
type=AVC msg=audit(1151335246.188:98): avc: denied { create } for
pid=7682 comm="dovecot" scontext=user_u:system_r:dovecot_t:s0
tcontext=user_u:system_r:dovecot_t:s0 tclass=socket
[root@bilbo audit]#
2. On Samba, I experience a different, but possibly related
problem. Samba starts, but I see the following message in the log
every few minutes:
Jun 25 23:09:25 bilbo smbd[1502]: Denied connection from
(192.168.0.5)
Jun 25 23:11:50 bilbo smbd[1513]: [2006/06/25 23:11:50, 0]
lib/access.c:check_access(328)
The other PC referred to in the log message is unable to even see
the linux share.
Any help here would be greatly appreciated.
Do you have a "hosts allow" line in /etc/samba/smb.conf ?
Yes. it reads > hosts allow = 192.168.0 127.
which has always worked in the past.
Try this:
hosts allow = 192.168.0. 127.
I have changed smb.conf to reflect that and now get (on my Windoze
box), "Access is denied"
and in /var/log/messages, the following entries result from that
attempt.
Jun 26 15:52:35 bilbo kernel: audit(1151333555.491:86): avc: denied
{ read } for pid=7352 comm="smbd" name="home" dev=dm-0 ino=24739841
scontext=user_u:system_r:smbd_t:s0
tcontext=system_u:object_r:home_root_t:s0 tclass=dir
Jun 26 15:52:35 bilbo kernel: audit(1151333555.571:87): avc: denied
{ read } for pid=7352 comm="smbd" name="home" dev=dm-0 ino=24739841
scontext=user_u:system_r:smbd_t:s0
tcontext=system_u:object_r:home_root_t:s0 tclass=dir
Jun 26 15:52:35 bilbo kernel: audit(1151333555.583:88): avc: denied
{ read } for pid=7352 comm="smbd" name="home" dev=dm-0 ino=24739841
scontext=user_u:system_r:smbd_t:s0
tcontext=system_u:object_r:home_root_t:s0 tclass=dir
Paul.
We seem to be getting closer, but I am still stumped.
You need to configure SELinux to allow samba sharing of home
directories (see "man samba_selinux"):
# setsebool -P samba_enable_home_dirs 1
That works a treat. Thanks Paul
--
Chris Jones
