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On 2017-07-27 18:15, Max Ashton wrote:
Hi guys,
I have just configured our squid proxy to use ntlm authentication.
I am failing to find correct file permission for the /var/lib/samba/winbindd_privileged folder. Squid failed to authenticate using winbind when the following file permissions are set 750, I get the following error in the log.
NTLM Authentication validating user. Result: {result=BH, notes={message: NT_STATUS_UNSUCCESSFUL NT_STATUS_UNSUCCESSFUL;
If I then change the permissions on winbindd_privileged to 757 everything works fine. However, this is not good practice and if the server restarts then winbind fails to start throwing the error "incorrect permissions set, 757 should be 750". Changing the permissions back allows winbind to start but squid then stops authenticating.
My first though is that the squid user is not in the correct group, so I add the proxy user into the winbindd_priv group using
sudo usermod -a -G winbindd_priv proxy
Check this with members winbindd_priv, indeed proxy is a member.
I then check that winbindd_priv is the assigned group for the folder, first I
Sudo chown root:winbindd_priv /var/lib/samba/winbindd_privileged/
to assigns it.
Then
Sudo ls -l root:winbindd_priv /var/lib/samba
drwxr-x--- 2 root winbindd_priv 4096 Jul 27 15:27 winbindd_privileged
It appears my proxy is not running as the "proxy" user ( I compiled squid with --with-default-user=proxy \)
As a note I have tried adding every user to winbindd_priv, same issue occurs.
Any ideas or suggestions on how I can get ntlm working without the 777 file permission would be great
Kind Regards
Max Ashton
JJO plc IT
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So what user are your squid running as?
There is a config directive "cache_effective_user" -
http://www.squid-cache.org/Doc/config/cache_effective_user/
On centOS, squid is running as 'squid' by default; adding squid to
group 'wbpriv' - default centOS-winbind group - allows to run
NTLM/negotiate authenticator without issue.
What OS? Is selinux enabled and enforcing policy applied?
--
Greets, Dijx
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