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[arcasys <mail@xxxxxxxxxx>]

Public bug reported:


If the hostname has more than 15 characters we use the netbios name directive to overcome the problem, e.g. netbios name = mysamba in the samba server configuration

This can cause several kinds of malfunction on the client machine, of
which the following is most important and reproducible:

A share defined as

[Dokumente]
        path = /home/myname/Dokumente
        writeable = yes
        valid users = myname

can be mounted on the client as smb://mysamba/dokumente/ by user myname but cannot be written to.
Error message: no permission.


samba server machine:
Description:	Ubuntu 14.04.6 LTS
Release:	14.04
samba:
  Installiert:           2:4.3.11+dfsg-0ubuntu0.14.04.20
  Installationskandidat: 2:4.3.11+dfsg-0ubuntu0.14.04.20

samba client machine:
Description:	Ubuntu 18.04.4 LTS
Release:	18.04
smbclient:
  Installiert:           2:4.7.6+dfsg~ubuntu-0ubuntu2.15
  Installationskandidat: 2:4.7.6+dfsg~ubuntu-0ubuntu2.15

We expected the share to be writeable by user 'myname'.
Instead the share is readable but produces permission denied errors when we try to save file or create a directory.

With a hostname with 15 characters or less and without the netbios name
directive everything works normal (no further change in smb.conf).

** Affects: samba (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1864853

Title:
  netbios name directive causes permission errors

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