Como posso ativar o acesso remoto à página Admin no CUPS?

Question

Estou procurando acesso à página de administração da interface da web do CUPS.

Eu posso acessar a página e navegar pela maior parte do site, mas infelizmente a página do administrador ainda está bloqueada por fontes remotas.

Eu defini Allow from all e também tentei Allow all em todos os lugares agora, mas ainda não consigo acessar a página.

O que estou perdendo?

Arquivo de configuração

#
#
# Sample 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

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

# Allow connection from remote hosts
Port 631
Listen /var/run/cups/cups.sock

# Show shared printers on the local network.
Browsing On
BrowseOrder allow,deny
BrowseAllow all
BrowseLocalProtocols all

# Default authentication type, when authentication is required...
DefaultAuthType Basic

# Web interface setting...
WebInterface Yes

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

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

# Restrict access to configuration files...
<Location /admin/conf>
  AuthType Default
  Order allow,deny
  Allow from all
</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
    Allow from all
  </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
    Allow from all
  </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 Default
    Require user @SYSTEM
    Order deny,allow
    Allow from all
  </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>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
    Allow from all
  </Limit>

  # Only the owner or an administrator can cancel or authenticate a job...
  <Limit Cancel-Job CUPS-Authenticate-Job>
    Require user @OWNER @SYSTEM
    Order deny,allow
    Allow from all
  </Limit>

  <Limit All>
    Order deny,allow
    Allow from all
  </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>
    AuthType Default
    Order deny,allow
    Allow from all
  </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>
    AuthType Default
    Require user @OWNER @SYSTEM
    Order deny,allow
    Allow from all
  </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>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
    Allow from all
  </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>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
    Allow from all
  </Limit>

  # Only the owner or an administrator can cancel or authenticate a job...
  <Limit Cancel-Job CUPS-Authenticate-Job>
    AuthType Default
    Require user @OWNER @SYSTEM
    Order deny,allow
    Allow from all
  </Limit>

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

Dockerfile

#
#   Add a Printer user
#
RUN useradd \
    --groups=sudo,lp,lpadmin \
    --create-home \
    --home-dir=/home/print \
    --shell=/bin/bash \
    print

#
#   Set the password for the printer user
#
RUN echo print:sdsds | chpasswd

    

Answer 1

O que eu faria é no seguinte bloco abaixo da tag </Policy> :

<Location />
    Order allow,deny
    Allow localhost
    Allow from 192.168.0.*
    Allow from 10.0.*.*
</Location>

Listen 0.0.0.0:631

Para acesso administrativo especificamente, a configuração "baunilha" normalmente possui:

<Location /admin/conf>
  AuthType Default
  Require user @SYSTEM
  Order allow,deny
</Location>

Para criar uma conta de usuário adequada, você só precisa criar um usuário que seja membro do grupo lpadmin (eu recomendo que você solicite algum tipo de autenticação para a seção admin): sudo useradd -g lpadmin cupsadmin , então definir uma senha.

Veja também link

Atualização: O abaixo deve funcionar como um ponto de partida para corrigir o problema levantado originalmente pelo @DavidGatti - não é tão completo / granular quanto a configuração original, mas a configuração da política pode ser adicionada novamente. / p>

Esta configuração, no entanto, elimina o uso do usuário @SYSTEM e, em vez disso, aceita qualquer usuário 'local' válido. O caso de uso para a configuração está executando o CUPS em um contêiner docker, portanto, parecia melhor evitar exigir qualquer coisa 'especial', além de um usuário com uma senha, para fornecer acesso administrativo ao CUPS.

# 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

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

# Default authentication type, when authentication is required...
DefaultAuthType Basic

# Web interface setting...
WebInterface Yes

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

# Restrict access to the admin pages...
# Allows anyone to try and access admin pages.
# Any local user's credentials will be accepted
<Location /admin>
  AuthType Basic
  Require valid-user
  Allow all
  Order allow,deny
</Location>

# Restrict access to configuration files...
# Any local user's credentials will be accepted
<Location /admin/conf>
  AuthType Basic
  Require valid-user
  Allow all
  Order allow,deny
</Location>

# Restrict access to log files...
# Any local user's credentials will be accepted
<Location /admin/log>
  AuthType Basic
  Require valid-user
  Allow all
  Order allow,deny
</Location>

Browsing On

Você também pode encontrar alguns indicadores decentes em Como configurar xícaras para permitir impressão remota com autenticação e impressão local sem?

    

Answer 2

Eu tentei todos os tipos de soluções, mas o navegador sempre retornava a mensagem "conexão recusada" até que eu mudei meu arquivo cupsd.conf assim:

Ouça 0.0.0.0:631 Porta 631