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无法添加打印机：使用 CUPS Web 界面添加打印机时未经授权

tag-icon • tag-icon docker cups printer
无法添加打印机：使用 CUPS Web 界面添加打印机时未经授权

我已经使用 Web 界面设置了 CUPS 服务器。遗憾的是，我无法通过执行以下步骤添加打印机：

  • 浏览器（REMOTE_SERVER_IP:631）
  • 管理选项卡
  • 本地打印机
  • 惠普打印机 (HPLIP)
  • 联系
  • 添加打印机（名称和所有好东西）
  • 选择型号
  • 选择驱动程序
  • 错误

在此输入图像描述

此时我收到消息：Unable to add printer: Unauthorized。我的配置文件如下所示：

# Disable cups internal logging - use logrotate instead
MaxLogSize 0

# Log general information in error_log - change "warn" to "debug"
# for troubleshooting...
LogLevel warn
#PageLogFormat

Listen /run/cups/cups.sock
Listen 0.0.0.0:631
Port 631

BrowseAddress *.*.*.*:631
BrowseAllow all

# Show shared printers on the local network.
Browsing On
BrowseLocalProtocols all

# Default authentication type, when authentication is required...
DefaultAuthType None

# Web interface setting...
WebInterface Yes

# Restrict access to the server...
<Location />
  Order allow,deny
  Allow All
</Location>

# Restrict access to the admin pages...
<Location /admin>
  Order allow,deny
  Allow All
</Location>

# Restrict access to configuration files...
<Location /admin/conf>
  Order allow,deny
  Allow All
</Location>

# Restrict access to log files...
<Location /admin/log>
  Order allow,deny
  Allow All
</Location>

我正在使用以下Dockerfile构建并开始整个事情。我还在图像中提供了一个新用户。

我缺少什么？

答案1

您还需要添加操作权限

<Policy default>
  <Limit All>
    Order allow,deny
    Allow all
  </Limit>
</Policy>

对于我的配置，我使用Allow @LOCAL而不是Allow all这样我将接受所有本地连接，但您的要求可能有所不同。

看来这些Location设置是递归的，所以有足够的

<Location />
  Order allow,deny
  Allow all
</Location>

所有其他路径（/admin 等）都将包含在内。

答案2

也许你已经解决了这个问题，但我也遇到了同样的问题。通过将“订单拒绝，允许”更改为“订单允许，拒绝”并删除所有身份验证内容来解决此问题。

这是我的配置文件：

#
# Configuration file for the CUPS scheduler.  See "man cupsd.conf" for a
# complete description of this file.
#

# Log general information in error_log - change "warn" to "debug"
# for troubleshooting...
LogLevel warn
PageLogFormat

# Deactivate CUPS' internal logrotating, as we provide a better one, especially
# LogLevel debug2 gets usable now
MaxLogSize 0

# Only listen for connections from the local machine.
Listen 631
Listen /var/run/cups/cups.sock

# Show shared printers on the local network.
Browsing Off
BrowseLocalProtocols dnssd

# Default authentication type, when authentication is required...
DefaultAuthType None

# Web interface setting...
WebInterface Yes

# Restrict access to the server...
<Location />
  Order allow,deny
  Allow all
</Location>

# Restrict access to the admin pages...
<Location /admin>
  Order allow,deny
  Allow all
</Location>

# Restrict access to configuration files...
<Location /admin/conf>
  AuthType None
  Order allow,deny
</Location>

# Restrict access to log files...
<Location /admin/log>
  AuthType None
  Order allow,deny
</Location>

# Set the default printer/job policies...
<Policy default>
  # Job/subscription privacy...
  JobPrivateAccess default
  JobPrivateValues default
  SubscriptionPrivateAccess default
  SubscriptionPrivateValues default

  # Job-related operations must be done by the owner or an administrator...
  <Limit Create-Job Print-Job Print-URI Validate-Job>
    Order deny,allow
  </Limit>

  <Limit Send-Document Send-URI Hold-Job Release-Job Restart-Job Purge-Jobs Set-Job-Attributes Create-Job-Subscription Renew-Subscription Cancel-Subscription Get-Notifications Reprocess-Job Cancel-Current-Job Suspend-Current-Job Resume-Job Cancel-My-Jobs Close-Job CUPS-Move-Job CUPS-Get-Document>
    #Require user @OWNER @SYSTEM
    #Order deny,allow
    Order allow,deny
  </Limit>

  # All administration operations require an administrator to authenticate...
  <Limit CUPS-Add-Modify-Printer CUPS-Delete-Printer CUPS-Add-Modify-Class CUPS-Delete-Class CUPS-Set-Default CUPS-Get-Devices>
    AuthType None
    Order allow,deny
  </Limit>

  # All printer operations require a printer operator to authenticate...
  <Limit Pause-Printer Resume-Printer Enable-Printer Disable-Printer Pause-Printer-After-Current-Job Hold-New-Jobs Release-Held-New-Jobs Deactivate-Printer Activate-Printer Restart-Printer Shutdown-Printer Startup-Printer Promote-Job Schedule-Job-After Cancel-Jobs CUPS-Accept-Jobs CUPS-Reject-Jobs>
    Order allow,deny
  </Limit>

  # Only the owner or an administrator can cancel or authenticate a job...
  <Limit Cancel-Job CUPS-Authenticate-Job>
    Order allow,deny
  </Limit>

  <Limit All>
    Order allow,deny
  </Limit>
</Policy>

# Set the authenticated printer/job policies...
<Policy authenticated>
  # Job/subscription privacy...
  JobPrivateAccess default
  JobPrivateValues default
  SubscriptionPrivateAccess default
  SubscriptionPrivateValues default

  # Job-related operations must be done by the owner or an administrator...
  <Limit Create-Job Print-Job Print-URI Validate-Job>
    Order allow,deny
  </Limit>

  <Limit Send-Document Send-URI Hold-Job Release-Job Restart-Job Purge-Jobs Set-Job-Attributes Create-Job-Subscription Renew-Subscription Cancel-Subscription Get-Notifications Reprocess-Job Cancel-Current-Job Suspend-Current-Job Resume-Job Cancel-My-Jobs Close-Job CUPS-Move-Job CUPS-Get-Document>
    Order allow,deny
  </Limit>

  # All administration operations require an administrator to authenticate...
  <Limit CUPS-Add-Modify-Printer CUPS-Delete-Printer CUPS-Add-Modify-Class CUPS-Delete-Class CUPS-Set-Default>
    Order allow,deny
  </Limit>

  # All printer operations require a printer operator to authenticate...
  <Limit Pause-Printer Resume-Printer Enable-Printer Disable-Printer Pause-Printer-After-Current-Job Hold-New-Jobs Release-Held-New-Jobs Deactivate-Printer Activate-Printer Restart-Printer Shutdown-Printer Startup-Printer Promote-Job Schedule-Job-After Cancel-Jobs CUPS-Accept-Jobs CUPS-Reject-Jobs>
    Order allow,deny
  </Limit>

  # Only the owner or an administrator can cancel or authenticate a job...
  <Limit Cancel-Job CUPS-Authenticate-Job>
    Order allow,deny
  </Limit>

  <Limit All>
    Order allow,deny
  </Limit>
</Policy>

答案3

您可以添加一个用户作为 cups 的管理员，而不是允许所有用户。
最简单的方法是将用户添加到lpadmin组中。

检查一下： 如何启用对 CUPS 中管理页面的远程访问

答案4

我在尝试添加打印机时也遇到了“未经授权”的错误。更多搜索显示使用 Google Chrome 访问 CUPS 2.2.7 时出现问题。它不会询问您的用户名和密码，直接进入“未经授权”。 （在 Ubuntu 18.04 LTS 上，CUPS 2.2.7 是默认值。）

使用不同的浏览器，特别是 Firefox，是一个简单的解决方法。

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