samba - Jun 2021 - Logging into Linux from Domain-joined Win10 desktop works for hostnames, not VIPs

On 05/06/2021 20:56, Vincent S. Cojot via samba wrote:
>
> Hi All,
>
> I've observed some strange thing and I know too little about Windows 
> to figure out what's going on so I would love it if someone could shed 
> some light..
>
> Here's the thing:
>
> From a win10 desktop, I PuTTY ssh to a server if I use PuTTY with the 
> remote server's hostname but if I use a VIP hosted on the same server, 
> my user gets prompted for a UNIX password (I'm not using SSH keys in 
> this environment, only plain AD with bind).
>
> In more detail:
> my RHEL servers are joined to the domain using this:
>
> # realm list
> ad.lasthome.solace.krynn
> ?type: kerberos
> ?realm-name: AD.LASTHOME.SOLACE.KRYNN
> ?domain-name: ad.lasthome.solace.krynn
> ?configured: kerberos-member
> ?server-software: active-directory
> ?client-software: sssd
> ?required-package: oddjob
> ?required-package: oddjob-mkhomedir
> ?required-package: sssd
> ?required-package: adcli
> ?required-package: samba-common-tools
> ?login-formats: %U
> ?login-policy: allow-realm-logins
>
> From any Windows10 desktop in the home, I can PuTTY without a password 
> prompt to <hostname1.lasthome.solace.krynn>.
>
> If I try to PuTTY to <floating1.lasthome.solace.krynn>, my user gets 
> prompted for its password.
>
> Any ideas? I'm just stumped.. (I don't use Win10 but some of my 
> children do and one has a need to ssh from it to a Linux box).
>
> Thank you,
>
> Vincent
>
you appear to be trying to connect to 'floating1.lasthome.solace.krynn' 
but your AD dns domain appears to be 'ad.lasthome.solace.krynn', so of 
course you are going to get asked for a password.

Can I ask where Samba comes into this ? If there are shares involved and 
the Samba version is >= 4.8.0, then you shouldn't be using sssd etc, but 
if you just want authentication, then you don't need Samba, you can just 
use sssd.

Rowland

Hi Rowland,

You are 100% right and perhaps what I am seeing in only sssd stuff. I've 
been able to locate a BZ (#1) talking about something similar so perhaps I
only need to 'net ads keytab add' on the Linux hosts.

Sorry for the noise,

#1: https://bugzilla.redhat.com/show_bug.cgi?id=1529301

Vincent

On Sat, 5 Jun 2021, Rowland penny via samba wrote:
> On 05/06/2021 20:56, Vincent S. Cojot via samba wrote:
>>
>>  Hi All,
>>
>>  I've observed some strange thing and I know too little about
Windows to
>>  figure out what's going on so I would love it if someone could
shed some
>>  light..
>>
>>  Here's the thing:
>>
>>  From a win10 desktop, I PuTTY ssh to a server if I use PuTTY with the
>>  remote server's hostname but if I use a VIP hosted on the same
server, my
>>  user gets prompted for a UNIX password (I'm not using SSH keys in
this
>>  environment, only plain AD with bind).
>>
>>  In more detail:
>>  my RHEL servers are joined to the domain using this:
>>
>>  # realm list
>>  ad.lasthome.solace.krynn
>>  ?type: kerberos
>>  ?realm-name: AD.LASTHOME.SOLACE.KRYNN
>>  ?domain-name: ad.lasthome.solace.krynn
>>  ?configured: kerberos-member
>>  ?server-software: active-directory
>>  ?client-software: sssd
>>  ?required-package: oddjob
>>  ?required-package: oddjob-mkhomedir
>>  ?required-package: sssd
>>  ?required-package: adcli
>>  ?required-package: samba-common-tools
>>  ?login-formats: %U
>>  ?login-policy: allow-realm-logins
>>
>>  From any Windows10 desktop in the home, I can PuTTY without a password
>>  prompt to <hostname1.lasthome.solace.krynn>.
>>
>>  If I try to PuTTY to <floating1.lasthome.solace.krynn>, my user
gets
>>  prompted for its password.
>>
>>  Any ideas? I'm just stumped.. (I don't use Win10 but some of
my children
>>  do and one has a need to ssh from it to a Linux box).
>>
>>  Thank you,
>>
>>  Vincent
>> 
>
> you appear to be trying to connect to
'floating1.lasthome.solace.krynn' but
> your AD dns domain appears to be 'ad.lasthome.solace.krynn', so of
course you
> are going to get asked for a password.
>
> Can I ask where Samba comes into this ? If there are shares involved and
the
> Samba version is >= 4.8.0, then you shouldn't be using sssd etc, but
if you
> just want authentication, then you don't need Samba, you can just use
sssd.
>
> Rowland
>
>
>
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