[CentOS] CentOS 5 + Quagga + SELinux
Daniel J Walsh
dwalsh at redhat.com
Fri Mar 7 13:43:16 UTC 2014
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 03/06/2014 07:07 PM, SilverTip257 wrote:
> On Wed, Mar 5, 2014 at 10:19 AM, Daniel J Walsh <dwalsh at redhat.com> wrote:
>
>>
>> man zebra_selinux
>>
>
> Thank you for the quick reply.
>
> ~]# man zebra_selinux No manual entry for zebra_selinux
>
> This is a rather basic (headless) install of CentOS 5.10 from the
> netinstall ISO. I haven't ripped out any default selinux pieces, so should
> I really be missing that manpage?
>
> ~]# cat /etc/*ele* cat: /etc/lsb-release.d: Is a directory CentOS release
> 5.10 (Final)
>
> ~]# apropos selinux | egrep 'zebra|quagga'
>
> If I remove the pipe to egrep, I do see squid_selinux for example.
>
>
>> ... If you want to allow zebra daemon to write it configuration files,
>> you must turn on the zebra_write_config boolean. Disabled by default.
>>
>> setsebool -P zebra_write_config 1
>>
>
> // before ~]# getsebool -a | grep zebra allow_zebra_write_config --> on
> zebra_disable_trans --> off
>
> Apparently the command from the Bugzilla ticket I linked to earlier took
> and already had allow_zebra_write_config enabled. setsebool -P
> allow_zebra_write_config=1
>
> // trying to set that selinux boolean comes back with ~]# setsebool -P
> zebra_write_config 1 libsemanage.dbase_llist_set: record not found in the
> database libsemanage.dbase_llist_set: could not set record value Could not
> change boolean zebra_write_config Could not change policy booleans
>
> On an selinux, but different topic... I had to modify the user (role and
> type were right) to allow dnsmasq to write to /var/log/dnsmasq.log ~]#
> chcon -v --user=system_u --role=object_r --type=var_log_t
> /var/log/dnsmasq.log This may or may not be the best/proper way, but
> appears to have fixed the dnsmasq logging + selinux clash.
>
> And now to apply that to my quagga/zebra + selinux situation... // before
> ~]# ls -Z /etc/quagga/ | egrep '(zebra|vtysh)\.conf' -rw-r----- quagga
> quaggavt root:object_r:zebra_conf_t vtysh.conf -rwxr-x--- quagga
> quaggavt system_u:object_r:zebra_conf_t vtysh.conf.sample -rw-------
> quagga quagga root:object_r:zebra_conf_t zebra.conf -rw-r--r-- root
> root system_u:object_r:zebra_conf_t zebra.conf.sample -rw-r-----
> quagga quaggavt root:object_r:zebra_conf_t zebra.conf.sav
>
> ~]# chcon -v --user=system_u /etc/quagga/vtysh.conf /etc/quagga/zebra.conf
> /etc/quagga/zebra.conf.sav
>
> // after ~]# ls -Z /etc/quagga/ | egrep '(zebra|vtysh)\.conf' -rw-r-----
> quagga quaggavt system_u:object_r:zebra_conf_t vtysh.conf -rwxr-x---
> quagga quaggavt system_u:object_r:zebra_conf_t vtysh.conf.sample -rw-------
> quagga quagga system_u:object_r:zebra_conf_t zebra.conf -rw-r--r--
> root root system_u:object_r:zebra_conf_t zebra.conf.sample -rw-r-----
> quagga quaggavt system_u:object_r:zebra_conf_t zebra.conf.sav
>
> // but no dice ... # write Building Configuration... Can't open
> configuration file /etc/quagga/zebra.conf.ZHwkuk. [OK]
>
>
>
> ~]# tail /var/log/audit/audit.log | grep zebra | audit2why ... type=AVC
> msg=audit(1394150156.203:30): avc: denied { add_name } for pid=3111
> comm="zebra" name="zebra.conf.fT434c" scontext=root:system_r:zebra_t:s0
> tcontext=system_u:object_r:zebra_conf_t:s0 tclass=dir Was caused by:
> Missing or disabled TE allow rule. Allow rules may exist but be disabled by
> boolean settings; check boolean settings. You can see the necessary allow
> rules by running audit2allow with this audit message as input.
>
> ~]# tail /var/log/audit/audit.log | grep zebra | audit2allow
>
>
> #============= zebra_t ============== allow zebra_t zebra_conf_t:dir
> add_name;
>
>
> What am I doing wrong here? ( missing manpage , still AVC denied )
>
>
> I'm learning a thing or two about SELinux with each bump in the road it
> presents to me. Thanks for the help and for bearing with me. ;)
>
>
Introduced in RHEL6 not in Rhel5 sorry
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
iEYEARECAAYFAlMZzPQACgkQrlYvE4MpobPh3wCfd54pFCl3U5zamlcOobHO47fl
npEAn2GdCQZnZbnzGu3mOr+G2rbR2nxp
=E3uw
-----END PGP SIGNATURE-----
More information about the CentOS
mailing list