[Samba] Logging into Linux from Domain-joined Win10 desktop works for hostnames, not VIPs

Rowland penny rpenny at samba.org
Sat Jun 5 20:15:24 UTC 2021

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
>  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.


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