您好，我有一台 Linux 服务器 (18.04)，它使用 netatalk 服务充当 TimeMachine 备份服务器。用户使用 LDAP (/etc/ldap.conf) 进行身份验证
客户端可以连接到 AFP 安装，进行 TimeMachine 备份并顺利注销。如果您需要共享更多 conf 文件，请告诉我。
AFPD 版本：
afpd -V
afpd 2.2.6 - Apple Filing Protocol (AFP) daemon of Netatalk
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version. Please see the file COPYING for further information and details.
afpd has been compiled with support for these features:
AFP versions: 1.1 2.0 2.1 2.2 3.0 3.1 3.2 3.3
DDP(AppleTalk) Support: Yes
CNID backends: dbd last tdb
SLP support: No
Zeroconf support: Avahi
TCP wrappers support: Yes
Quota support: Yes
Admin group support: Yes
Valid shell checks: Yes
cracklib support: Yes
Dropbox kludge: No
Force volume uid/gid: No
EA support: ad | sys
ACL support: Yes
LDAP support: Yes
afpd.conf: /etc/netatalk/afpd.conf
AppleVolumes.system: /etc/netatalk/AppleVolumes.system
AppleVolumes.default: /etc/netatalk/AppleVolumes.default
afp_signature.conf: /etc/netatalk/afp_signature.conf
afp_voluuid.conf: /etc/netatalk/afp_voluuid.conf
afp_ldap.conf: /etc/netatalk/afp_ldap.conf
UAM search path: /usr/lib/netatalk/
Server messages path: /etc/netatalk/msg/
lockfile: /var/run/afpd.pid
/etc/pam.d/common-auth
#
# /etc/pam.d/common-auth - authentication settings common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of the authentication modules that define
# the central authentication scheme for use on the system
# (e.g., /etc/shadow, LDAP, Kerberos, etc.). The default is to use the
# traditional Unix authentication mechanisms.
#
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules. See
# pam-auth-update(8) for details.
#auth required pam_listfile.so onerr=fail item=group sense=allow file=/etc/login.group.allowed
# here are the per-package modules (the "Primary" block)
auth [success=2 default=ignore] pam_unix.so nullok_secure
auth [success=1 default=ignore] pam_ldap.so use_first_pass
# here's the fallback if no module succeeds
auth requisite pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
auth required pam_permit.so
# and here are more per-package modules (the "Additional" block)
auth optional pam_cap.so
# end of pam-auth-update config
/etc/pam.d/通用帐户
#
# /etc/pam.d/common-account - authorization settings common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of the authorization modules that define
# the central access policy for use on the system. The default is to
# only deny service to users whose accounts are expired in /etc/shadow.
#
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules. See
# pam-auth-update(8) for details.
#
# here are the per-package modules (the "Primary" block)
account [success=2 new_authtok_reqd=done default=ignore] pam_unix.so
account [success=1 default=ignore] pam_ldap.so
# here's the fallback if no module succeeds
account requisite pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
account required pam_permit.so
# and here are more per-package modules (the "Additional" block)
# end of pam-auth-update config
/etc/pam.d/common-session
#
# /etc/pam.d/common-session - session-related modules common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of modules that define tasks to be performed
# at the start and end of sessions of *any* kind (both interactive and
# non-interactive).
#
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules. See
# pam-auth-update(8) for details.
# here are the per-package modules (the "Primary" block)
session [default=1] pam_permit.so
# here's the fallback if no module succeeds
session requisite pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
session required pam_permit.so
# The pam_umask module will set the umask according to the system default in
# /etc/login.defs and user settings, solving the problem of different
# umask settings with different shells, display managers, remote sessions etc.
# See "man pam_umask".
session optional pam_umask.so
# and here are more per-package modules (the "Additional" block)
session required pam_unix.so
session optional pam_ldap.so
session optional pam_systemd.so
session optional pam_mkhomedir.so skel=/etc/skel/ umask=0066
# end of pam-auth-update config
/etc/pam.d/通用密码
#
# /etc/pam.d/common-password - password-related modules common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of modules that define the services to be
# used to change user passwords. The default is pam_unix.
# Explanation of pam_unix options:
#
# The "sha512" option enables salted SHA512 passwords. Without this option,
# the default is Unix crypt. Prior releases used the option "md5".
#
# The "obscure" option replaces the old `OBSCURE_CHECKS_ENAB' option in
# login.defs.
#
# See the pam_unix manpage for other options.
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules. See
# pam-auth-update(8) for details.
# here are the per-package modules (the "Primary" block)
password requisite pam_cracklib.so retry=3 minlen=8 difok=3
password [success=2 default=ignore] pam_unix.so obscure use_authtok try_first_pass sha512
password [success=1 user_unknown=ignore default=die] pam_ldap.so use_authtok try_first_pass
# here's the fallback if no module succeeds
password requisite pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
password required pam_permit.so
# and here are more per-package modules (the "Additional" block)
# end of pam-auth-update config
错误日志在 auth.log 中
Jul 20 11:05:17 server afpd[5131]: pam_unix(netatalk:auth): authentication failure; logname= uid=0 euid=0 tty=afpd ruser=demouser rhost=192.168.1.10 user=demouser
Jul 20 11:05:17 server afpd[5131]: pam_unix(netatalk:session): session opened for user demouser by (uid=0)
Jul 20 11:05:17 server systemd-logind[1166]: New session c23 of user demouser.
Jul 20 11:06:21 server afpd[5131]: pam_unix(netatalk:session): session closed for user demouser
Jul 20 11:06:21 server dbus-daemon[1278]: [system] Rejected send message, 2 matched rules; type="method_call", sender=":1.69" (uid=10001 pid=5131 comm="/usr/sbin/afpd -U uams_dhx2.so,uams_clrtxt.so -g n" label="unconfined") interface="org.freedesktop.login1.Manager" member="ReleaseSession" error name="(unset)" requested_reply="0" destination="org.freedesktop.login1" (uid=0 pid=1166 comm="/lib/systemd/systemd-logind " label="unconfined")
Jul 20 11:06:21 server afpd[5131]: pam_systemd(netatalk:session): Failed to release session: Access denied
Jul 20 11:06:21 server afpd[5131]: PAM audit_log_acct_message() failed: Operation not permitted
Jul 20 11:06:21 server systemd-logind[1166]: Removed session c23.
答案1
我设法通过替换 /etc/pam.d/netatalk 文件来修复除以下错误之外的所有错误：
#%PAM-1.0
@include common-auth
@include common-account
@include common-password
@include common-session
到：
#%PAM-1.0
auth required pam_ldap.so try_first_pass
account required pam_ldap.so try_first_pass
session required pam_permit.so
会话终止后，仍然会出现以下错误：
Jul 23 13:52:05 server afpd[2426]: PAM audit_log_acct_message() failed: Operation not permitted