프린터를 추가할 수 없음: CUPS 웹 인터페이스를 사용하여 프린터를 추가하는 동안 인증되지 않았습니다.

작업 권한도 추가해야 합니다.

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

Allow @LOCAL내 구성에서는 대신 사용하므로 Allow all모든 로컬 연결을 허용하지만 요구 사항은 다를 수 있습니다.

이러한 Location설정은 재귀적이므로 충분합니다.

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

다른 모든 경로(/admin 등)가 포함됩니다.

어쩌면 당신은 이 문제를 해결했지만 나도 같은 문제에 직면했습니다. "주문 거부, 허용"을 "주문 허용, 거부"로 변경하고 모든 인증 항목을 제거하여 이 문제를 해결했습니다.

이것은 내 구성 파일입니다.

#
# 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>

모든 사용자를 허용하는 대신 사용자를 컵 관리자로 추가할 수 있습니다.
가장 쉬운 방법은 사용자를 lpadmin그룹에 추가하는 것입니다.

확인하다: CUPS의 관리 페이지에 대한 원격 액세스를 활성화하는 방법

또한 프린터를 추가하려고 할 때 "승인되지 않음" 오류가 발생했습니다. 더 많은 검색을 통해 Google Chrome을 사용하여 CUPS 2.2.7에 액세스하는 데 문제가 있음이 드러났습니다. 사용자 이름과 비밀번호를 묻지 않고 바로 "승인되지 않음"으로 이동하세요. (Ubuntu 18.04 LTS에서는 CUPS 2.2.7이 기본값입니다.)

다른 브라우저, 특히 Firefox를 사용하면 쉽게 해결할 수 있습니다.