/etc/pam.d/ ssh 和登錄規則

在/etc/pam.d/，配置文件對於sshd和login有一些規則selinux。當我不使用 selinux 時，我可以簡單地禁用這些行嗎？我想簡化 pam 規則。

具體來說，這些行是：

session [success=ok ignore=ignore module_unknown=ignore default=bad]        pam_selinux.so close
session [success=ok ignore=ignore module_unknown=ignore default=bad]        pam_selinux.so open

我要求確定，因為我認為有時天真地註釋行可能會干擾通過規則的 tte 流程。

完整sshd配置如下：

# PAM configuration for the Secure Shell service

# Standard Un*x authentication.
@include common-auth

# Standard Un*x authorization.
@include common-account

# SELinux needs to be the first session rule.  This ensures that any lingering context has been cleared.
# Without this it is possible that a module could execute code in the wrong domain.
session [success=ok ignore=ignore module_unknown=ignore default=bad]        pam_selinux.so close

# Set the loginuid process attribute.
session    required     pam_loginuid.so

# Create a new session keyring.
session    optional     pam_keyinit.so force revoke

# Standard Un*x session setup and teardown.
@include common-session

# Print the status of the user's mailbox upon successful login.
session    optional     pam_mail.so standard noenv # [1]

# Set up user limits from /etc/security/limits.conf.
session    required     pam_limits.so

# Read environment variables from /etc/environment and
# /etc/security/pam_env.conf.
session    required     pam_env.so # [1]
# In Debian 4.0 (etch), locale-related environment variables were moved to
# /etc/default/locale, so read that as well.
session    required     pam_env.so user_readenv=1 envfile=/etc/default/locale

# SELinux needs to intervene at login time to ensure that the process starts
# in the proper default security context.  Only sessions which are intended
# to run in the user's context should be run after this.
session [success=ok ignore=ignore module_unknown=ignore default=bad]        pam_selinux.so open

# Standard Un*x password updating.
@include common-password

pam_selinux.so為 PAM 會話設置 SELinux 安全上下文。如果 SELinux 被禁用，則 PAM 模組將沒有任何影響，可以將其刪除。

請注意，如果 SELinux 處於許可模式，SELinux 規則仍會使用但不會強制執行。刪除pam_selinux.so將導致程序在不正確的安全上下文中執行，這可能會在審計日誌中生成大量 AVC 拒絕消息。

如果稍後啟用 SELinux，則pam_selinux.so需要在 PAM 配置中才能使使用者登錄正常工作。

我認為如果您不確切知道這意味著什麼，那麼在嘗試刪除 pam config 中的 2 行之前，您可以在配置文件中簡化很多事情。這是我的 2 美分，因為我對 pam 一無所知。

引用自：https://unix.stackexchange.com/questions/549800