Re: Sharing users among few hosts

2014-02-24 Thread Tam Nguyen
Is setting up DNS your biggest hustle?  There are plenty of tutorial
online.  Keep digging.

RedHat Identity Management is using LDAP, Kerberos, and all other goodies,
why not stick with that?
It came with GUI that allows you to administrate account, policies,
identities, and hosts/clients/servers authentication.  Setting up master
and client nodes are fairly straight forward.  Biggest plus is creating a
master replica, which is very easy.

https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html-single/Identity_Management_Guide/#Kerberos_KDC





On Mon, Feb 24, 2014 at 11:33 AM, צביקה הרמתי haramaty.zv...@gmail.comwrote:

 Hi.
 After reading about (and a little bit experimenting with) NIS, LDAP and
 Kerberos, I concluded that:
 - Using NIS is really easy - however, it's too insecure
 - Using LDAP is too complicated for my 3-4 servers network

 Many criticize NIS as being insecure; I haven't seen such criticism about
 LDAP.
 However, as Nico Kadel-Garcia‏ pointed out, Kerberos (is the) Underlying
 authentication technology for most LDAP setups.

 So, if it's a common practice to setup LDAP and then fortify it with
 Kerberos; wouldn't it be easier to setup NIS and fortify it with Kerberos?

 Is this combination possible/feasible?
 Anyone can point to some reference about how to achieve that combination?

 Am I missing some drawbacks (except of using an aging technology, that
 doesn't co-operate with Windows)?

 Thanks,
 Zvika


 2014-02-19 13:21 GMT+02:00 צביקה הרמתי haramaty.zv...@gmail.com:

 Hi.
 Thank you all for the good advices.
 Now I just have to decide how to proceed...



 2014-02-18 1:59 GMT+02:00 Paul Robert Marino prmari...@gmail.com:

 TLS/SSL won't work correctly if you use the /etc/hosts file. That is the
 real constraint with LDAP and DNS.
 But its not that severe all you need to be able to do is forward and
 reverse lookup the host name and match it to the IP address.
 You do not really need the SRV records. As long as the name in the cert
 matches the DNS A record for the hostname(s) and the reverse lookup of the
 resulting IP also matches the hostname(s) in the cert you are good.

 One other option is you don't really need the passwords in the LDAP
 database you can put it in Kerberos then you don't have to worry about
 clear text passwords at all and there are no DNS requirements.

 It takes a out 15 minutes to set up a Kerberos server and only about an
 hour to setup 389 server (a.k.a Red Hat Directory server a.k.a. Netscape
 Directory Server) from scratch to use Kerberos Auth.
 Then on your client configs you specify the IP addresses instead of the
 host names.







 -- Sent from my HP Pre3

 --
 On Feb 17, 2014 9:09, Tam Nguyen tam8gu...@gmail.com wrote:

 If you wanted to avoid DNS, then you can *temporarily* achieve that on
 RH Identity Management by updating the /etc/hosts files on the server and
 client nodes.

 -Tam



 On Mon, Feb 17, 2014 at 6:57 AM, צביקה הרמתי 
 haramaty.zv...@gmail.comwrote:

 Hi.

 I want to have several hosts, sharing the same Users Accounts database.
 i.e, user John will be able to seamlessly login to host1 or to host2,
 without having to manually config John's credentials unto each machine.
 Nothing more than that...

 LDAP seems like the solution, however, I tried to find an easy tutorial
 and understood that maybe it's a little bit overkill for my humble
 requirements.

 I've read about RH Identity Management (
 https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Identity_Management_Guide/index.html
 )
 It seemed interesting; but its DNS requirements are a little bit too
 complicated for scenerio (having the IDM server's public IP properly
 configured DNS record).

 Am I missing something?
 There must be simpler way...

 Thanks,
 Zvika






Re: Sharing users among few hosts

2014-02-17 Thread Tam Nguyen
If you wanted to avoid DNS, then you can *temporarily* achieve that on RH
Identity Management by updating the /etc/hosts files on the server and
client nodes.

-Tam



On Mon, Feb 17, 2014 at 6:57 AM, צביקה הרמתי haramaty.zv...@gmail.comwrote:

 Hi.

 I want to have several hosts, sharing the same Users Accounts database.
 i.e, user John will be able to seamlessly login to host1 or to host2,
 without having to manually config John's credentials unto each machine.
 Nothing more than that...

 LDAP seems like the solution, however, I tried to find an easy tutorial
 and understood that maybe it's a little bit overkill for my humble
 requirements.

 I've read about RH Identity Management (
 https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Identity_Management_Guide/index.html
 )
 It seemed interesting; but its DNS requirements are a little bit too
 complicated for scenerio (having the IDM server's public IP properly
 configured DNS record).

 Am I missing something?
 There must be simpler way...

 Thanks,
 Zvika



Re: Sharing users among few hosts

2014-02-17 Thread Tam Nguyen
Btw, if security isn't your main concern, then have a look at NIS.

-Tam



On Mon, Feb 17, 2014 at 6:57 AM, צביקה הרמתי haramaty.zv...@gmail.comwrote:

 Hi.

 I want to have several hosts, sharing the same Users Accounts database.
 i.e, user John will be able to seamlessly login to host1 or to host2,
 without having to manually config John's credentials unto each machine.
 Nothing more than that...

 LDAP seems like the solution, however, I tried to find an easy tutorial
 and understood that maybe it's a little bit overkill for my humble
 requirements.

 I've read about RH Identity Management (
 https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Identity_Management_Guide/index.html
 )
 It seemed interesting; but its DNS requirements are a little bit too
 complicated for scenerio (having the IDM server's public IP properly
 configured DNS record).

 Am I missing something?
 There must be simpler way...

 Thanks,
 Zvika



Re: 6.3. Upgrade won't display 6.4

2013-04-01 Thread Tam Nguyen
To upgrade to 6.4, try this:
yum --releasever=6.4 update

There are other ways to upgrade to 6.4, but I find the above command works
for me.  If you have nvidia video card, then don't forget to resolve that.
-Tam

On Mon, Apr 1, 2013 at 8:22 AM, Andrew Z form...@gmail.com wrote:

 Morning,
 I ran the yum update on sl and sl-security repos from my up to date 6.3,
 yet /etc/redhat-release is still 6.3
 I did run yum clean beforehand.
 What did I miss?
 Thank you
 AZ