RE: [squid-users] SELINUX issue(confined>unconfined)

Thank you i will give it a try. However i am also thinking of running SELinux in permissive mode for my proxy server. what do you say about it?
 
 
regards,
 
Bilal

----------------------------------------
> Date: Tue, 18 May 2010 15:00:05 +0200
> From: tiery.denys_at_gmail.com
> To: gigoz_at_msn.com
> CC: squid-users_at_squid-cache.org
> Subject: Re: [squid-users] SELINUX issue(confined>unconfined)
>
> okay,
>
> I have also worked on a similar project (squid/kerberos/selinux).
> I installed squid in /usr/local/squid but I had to modify
> /etc/selinux/targeted/contexts/files/file_contexts and adapt it to my
> squid directory.
>
> /usr/local/squid/etc(/.*)? system_u:object_r:squid_conf_t:s0
> /usr/local/squid/var/logs(/.*)? system_u:object_r:squid_log_t:s0
> /usr/local/squid/share(/.*)? system_u:object_r:squid_conf_t:s0
> /usr/local/squid/var/cache(/.*)? system_u:object_r:squid_cache_t:s0
> /usr/local/squid/sbin/squid -- system_u:object_r:squid_exec_t:s0
> /usr/local/squid/var/logs/squid\.pid -- system_u:object_r:squid_var_run_t:s0
> /usr/local/squid/libexec(/.*)? system_u:object_r:lib_t:s0
> /usr/local/squid -d system_u:object_r:bin_t:s0
> /usr/local/squid/var -d system_u:object_r:var_t:s0
>
> Then restore context (with restorecon or .autorelabel and reboot).
>
> But i am not sure modifing this file is the best way.
> It you update your selinux policy, changement will not be persistent.
>
> I think it is better to build a selinux module for our squid.
>
> Tiery
>
>
>
> On Tue, May 18, 2010 at 2:34 PM, GIGO . wrote:
>>
>> Yes i am using a compiled version. I have used this command chcon -t unconfined_exec_t /usr/sbin/squid and its working now. Is this a security issue?
>>
>> regards,
>>
>> Bilal
>>
>>
>>
>>
>>
>>
>>
>> ----------------------------------------
>>> Date: Tue, 18 May 2010 14:26:06 +0200
>>> From: tiery.denys_at_gmail.com
>>> To: squid-users_at_squid-cache.org
>>> Subject: Re: [squid-users] SELINUX issue(confined>unconfined)
>>>
>>> Hi,
>>>
>>> ps -Z => squid_t and getenforce => enforcing
>>> squid is started with selinux
>>>
>>> Redhat/centos platform:
>>> If squid is installed with yum, squid will be started with a squid_t
>>> selinux context.
>>>
>>> If you compile your squid and installed it, you will have to change
>>> squid files contexts manually.
>>>
>>> As i see you have squid_kerb_plugin, you should have compile you squid
>>> to support kerberos, no?
>>>
>>> ---
>>>
>>> For your problem:
>>>
>>> try to check selinux log:
>>> audit2allow -al
>>> or cat /var/log/audit/audit.log | audit2allow
>>>
>>> You can also try to restore selinux context for all squid files:
>>> restorecon -R /etc/squid
>>> restorecon -R /var/log/squid
>>>
>>> etc...
>>>
>>> or touch /.autorelabel and reboot
>>>
>>>
>>> Tiery
>>>
>>> On Tue, May 18, 2010 at 9:47 AM, GIGO . wrote:
>>>>
>>>> Dear All,
>>>>
>>>> Your guidance is required. Please help.
>>>>
>>>> It looks that squid process run by default as a confined process whether its a compiled version or a version that come with the linux distro. It means that the squid software is SELINUX aware.Am i right?
>>>>
>>>> [root_at_squidLhr ~]# ps -eZ | grep squid
>>>> system_u:system_r:squid_t 3173 ? 00:00:00 squid
>>>> system_u:system_r:squid_t 3175 ? 00:00:00 squid
>>>> system_u:system_r:squid_t 3177 ? 00:00:00 squid
>>>> system_u:system_r:squid_t 3179 ? 00:00:00 squid
>>>> system_u:system_r:squid_t 3222 ? 00:00:00 unlinkd
>>>> system_u:system_r:squid_t 3223 ? 00:00:00 unlinkd
>>>>
>>>>
>>>> it was successful before i changed the selinux to enforcing.Now i even cannot start squid process that access the parent at localhost(3128) manually even. The other process starts normally if i do manually.
>>>>
>>>> When running as an unconfined process by the following command the problem had resolved
>>>>
>>>> chcon -t unconfined_exec_t /usr/sbin/squid
>>>>
>>>> However it doesnot feel appropriate to me. Please guide me on this.
>>>>
>>>>
>>>>
>>>> I am starting squid with the following init script if it has something to do with the problem:
>>>>
>>>> #!/bin/sh
>>>> #
>>>> #my script
>>>> case "$1" in
>>>> start)
>>>> /usr/sbin/squid -D -sYC -f /etc/squid/squidcache.conf
>>>> /usr/sbin/squid -D -sYC -f /etc/squid/squid.conf
>>>> #The below line is to automatically start apache with system startup
>>>> /usr/sbin/httpd -k start
>>>> #KRB5_KTNAME=/etc/squid/HTTP.keytab
>>>> #export KRB5_KTNAME
>>>> #KRB5RCACHETYPE=none
>>>> #export KRB5RCACHETYPE
>>>> ;;
>>>> stop)
>>>>
>>>> /usr/sbin/squid -k shutdown -f /etc/squid3/squidcache.conf
>>>> echo "Shutting down squid secondary process"
>>>> /usr/sbin/squid -k shutdown -f /etc/squid3/squid.conf
>>>> echo "Shutting down squid main process"
>>>> # The below line is to automatically stop apache at system shutdown
>>>> /usr/sbin/httpd -k stop
>>>> ;;
>>>> esac
>>>>
>>>>
>>>> Thanking you & regards,
>>>>
>>>> Bilal
>>>>
>>>>
>>>> ----------------------------------------
>>>>> From: gigoz_at_msn.com
>>>>> To: squid-users_at_squid-cache.org
>>>>> Date: Tue, 18 May 2010 06:02:35 +0000
>>>>> Subject: [squid-users] SELINUX issue
>>>>>
>>>>>
>>>>> Hi all,
>>>>>
>>>>> When i change SELINUX from permissive mode to Enforcing mode. My multiple instance setup fail to start. Please guide how to overcome this.
>>>>>
>>>>> -----------------------Excerpts from cache.log-----------------
>>>>>
>>>>> 2010/05/18 10:31:51| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:51| Store rebuilding is 7.91% complete
>>>>> 2010/05/18 10:31:52| Done reading /var/spool/squid swaplog (51794 entries)
>>>>> 2010/05/18 10:31:52| Finished rebuilding storage from disk.
>>>>> 2010/05/18 10:31:52| 51794 Entries scanned
>>>>> 2010/05/18 10:31:52| 0 Invalid entries.
>>>>> 2010/05/18 10:31:52| 0 With invalid flags.
>>>>> 2010/05/18 10:31:52| 51794 Objects loaded.
>>>>> 2010/05/18 10:31:52| 0 Objects expired.
>>>>> 2010/05/18 10:31:52| 0 Objects cancelled.
>>>>> 2010/05/18 10:31:52| 0 Duplicate URLs purged.
>>>>> 2010/05/18 10:31:52| 0 Swapfile clashes avoided.
>>>>> 2010/05/18 10:31:52| Took 1.13 seconds (45641.00 objects/sec).
>>>>> 2010/05/18 10:31:52| Beginning Validation Procedure
>>>>> 2010/05/18 10:31:52| Completed Validation Procedure
>>>>> 2010/05/18 10:31:52| Validated 103614 Entries
>>>>> 2010/05/18 10:31:52| store_swap_size = 913364
>>>>> 2010/05/18 10:31:52| storeLateRelease: released 0 objects
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| Detected DEAD Parent: 127.0.0.1
>>>>> 2010/05/18 10:31:52| TCP connection to 127.0.0.1/3128 failed
>>>>> 2010/05/18 10:31:52| Failed to select source for 'http://1.channel19.facebook.com/p'
>>>>> 2010/05/18 10:31:52| always_direct = 0
>>>>> 2010/05/18 10:31:52| never_direct = 1
>>>>> 2010/05/18 10:31:52| timedout = 0
>>>>> 2010/05/18 10:31:57| Failed to select source for 'http://0.channel19.facebook.cm
>>>>>
>>>>> --------------------------------------------------------------------------------------------
>>>>>
>>>>>
>>>>> regards,
>>>>>
>>>>> Bilal
>>>>> _________________________________________________________________
>>>>> Hotmail: Trusted email with powerful SPAM protection.
>>>>> https://signup.live.com/signup.aspx?id=60969
>>>> _________________________________________________________________
>>>> Hotmail: Powerful Free email with security by Microsoft.
>>>> https://signup.live.com/signup.aspx?id=60969
>> _________________________________________________________________
>> Hotmail: Powerful Free email with security by Microsoft.
>> https://signup.live.com/signup.aspx?id=60969
_________________________________________________________________
Your E-mail and More On-the-Go. Get Windows Live Hotmail Free.
https://signup.live.com/signup.aspx?id=60969
Received on Wed May 19 2010 - 04:17:52 MDT