# cupsd.conf

The /etc/cups/cupsd.conf file contains configuration directives that control how the server functions. Each directive is listed on a line by itself followed by its value. Comments are introduced using the number sign ("#") character at the beginning of a line.

Since the server configuration file consists of plain text, you can use your favorite text editor to make changes to it. After making any changes, restart the `cupsd(8)` process using the startup script for your operating system:

- AIX, Linux, Solaris:

      /etc/init.d/cups restart

- HP-UX:

      /sbin/init.d/cups restart

- MacOS X:

      sudo launchctl unload /System/Library/LaunchDaemons/org.cups.cupsd.plist
      sudo launchctl load /System/Library/LaunchDaemons/org.cups.cupsd.plist

You can also edit this file from the CUPS web interface, which automatically handles restarting the scheduler.

> Note:

> The specification of time units ("w" for weeks, "h" for hours, etc.) in the various time interval directives is new in CUPS 1.6/OS X 10.8. Prior releases of CUPS only supported time intervals in seconds.

## AccessLogLevel

### Examples

    AccessLogLevel config
    AccessLogLevel actions
    AccessLogLevel all

### Description

The `AccessLogLevel` directive controls which requests are logged to the access log file. The following levels are defined:

- `config`; Log when printers and classes are added, deleted, or modified and when configuration files are accessed or updated.
- `actions`; Log when print jobs are submitted, held, released, modified, or canceled, and any of the conditions for `config`.
- `all`; Log all requests.

The default access log level is `actions`.

## Allow

### Examples

    <Location /path>
      ...
      Allow from All
      Allow from None
      Allow from *.example.com
      Allow from .example.com
      Allow from host.example.com
      Allow from nnn.*
      Allow from nnn.nnn.*
      Allow from nnn.nnn.nnn.*
      Allow from nnn.nnn.nnn.nnn
      Allow from nnn.nnn.nnn.nnn/mm
      Allow from nnn.nnn.nnn.nnn/mmm.mmm.mmm.mmm
      Allow from [xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx]
      Allow from [xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx]/mmm
      Allow from @LOCAL
      Allow from @IF(name)
    </Location>

### Description

The `Allow` directive specifies a hostname, IP address, or network that is allowed access to the server. `Allow` directives are cumulative, so multiple `Allow` directives can be used to allow access for multiple hosts or networks.

Host and domain name matching require that you enable the `HostNameLookups` directive.

The `/mm` notation specifies a CIDR netmask, as shown in Table 1.

Table 1: CIDR Netmasks
mm | netmask | mm | netmask
--- | --- | --- | ---
0 | 0.0.0.0 | 8 | 255.0.0.0
1 | 128.0.0.0 | 16 | 255.255.0.0
2 | 192.0.0.0 | 24 | 255.255.255.0
... | ... | 32 | 255.255.255.255

The `@LOCAL` name will allow access from all local interfaces. The `@IF(name)` name will allow access from the named interface. In both cases, CUPS only allows access from the network that the interface(s) are configured for - requests arriving on the interface from a foreign network will not be accepted.

The `Allow` directive must appear inside a `Location` or `Limit` section.

## AuthType

### Examples

    <Location /path>
      ...
      AuthType None
      AuthType Basic
      AuthType Digest
      AuthType BasicDigest
      AuthType Negotiate
    </Location>

### Description

The `AuthType` directive defines the type of authentication to perform:

- `None` - No authentication should be performed (default)
- `Basic` - Basic authentication should be performed using the UNIX password and group files
- `Digest` - Digest authentication should be performed using the /etc/cups/passwd.md5 file
- `BasicDigest` - Basic authentication should be performed using the /etc/cups/passwd.md5 file
- `Negotiate` - Kerberos authentication should be performed

When using `Basic`, `Digest`, `BasicDigest`, or `Negotiate` authentication, clients connecting through the `localhost` interface can also authenticate using certificates.

The `AuthType` directive must appear inside a `Location` or `Limit` section.

## AutoPurgeJobs

### Examples

    AutoPurgeJobs Yes
    AutoPurgeJobs No

### Description

The `AutoPurgeJobs` directive specifies whether or not to purge completed jobs once they are no longer required for quotas. This option has no effect if quotas are not enabled. The default setting is `No`.

## CUPS 1.2/OS X 10.5 BrowseLocalProtocols

### Examples

    BrowseLocalProtocols all
    BrowseLocalProtocols none
    BrowseLocalProtocols dnssd

### Description

The `BrowseLocalProtocols` directive specifies the protocols to use when advertising local shared printers on the network. Multiple protocols can be specified by separating them with spaces. The default is "`dnssd`" on systems that support Bonjour and "`none`" on all others.

## BrowseWebIF

### Examples

    BrowseWebIF On
    BrowseWebIF Off

### Description

The `BrowseWebIF` directive controls whether the CUPS web interface is advertised via DNS-SD. The default setting is `Off`.

## Browsing

### Examples

    Browsing On
    Browsing Off

### Description

The `Browsing` directive controls whether or not printer sharing is enabled. The default setting is `On`.

## CUPS 1.1.7 Classification

### Examples

    Classification
    Classification classified
    Classification confidential
    Classification secret
    Classification topsecret
    Classification unclassified

### Description

The `Classification` directive sets the classification level on the server. When this option is set, at least one of the banner pages is forced to the classification level, and the classification is placed on each page of output. The default is no classification level.

## CUPS 1.1.10 ClassifyOverride

### Examples

    ClassifyOverride Yes
    ClassifyOverride No

### Description

The `ClassifyOverride` directive specifies whether users can override the default classification level on the server. When the server classification is set, users can change the classification using the `job-sheets` option and can choose to only print one security banner before or after the job. If the `job-sheets` option is set to `none` then the server default classification is used.

The default is to not allow classification overrides.

## CUPS 1.2/OS X 10.5 DefaultAuthType

### Examples

    DefaultAuthType Basic
    DefaultAuthType BasicDigest
    DefaultAuthType Digest
    DefaultAuthType Negotiate

### Description

The `DefaultAuthType` directive specifies the type of authentication to use for IPP operations that require a username. The default is `Basic`.

## CUPS 1.2/OS X 10.5 DefaultEncryption

### Examples

    DefaultEncryption Never
    DefaultEncryption IfRequested
    DefaultEncryption Required

### Description

The `DefaultEncryption` directive specifies the type of encryption to use when performing authentication. The default is `Required`.

## DefaultLanguage

### Examples

    DefaultLanguage de
    DefaultLanguage en
    DefaultLanguage es
    DefaultLanguage fr
    DefaultLanguage it

### Description

The `DefaultLanguage` directive specifies the default language to use for client connections. Setting the default language also sets the default character set if a language localization file exists for it. The default language is "en" for English.

## CUPS 1.4/OS X 10.6 DefaultPaperSize

### Examples

    DefaultPaperSize Letter
    DefaultPaperSize A4
    DefaultPaperSize Auto
    DefaultPaperSize None

### Description

The `DefaultPaperSize` directive specifies the default paper size to use when creating new printers. The default is `Auto` which uses a paper size appropriate for the system default locale. A value of `None` tells the scheduler to not set the default paper size.

## CUPS 1.2/OS X 10.5 DefaultPolicy

### Examples

    DefaultPolicy default
    DefaultPolicy authenticated
    DefaultPolicy foo

### Description

The `DefaultPolicy` directive specifies the default policy to use for IPP operation. The default is `default`. CUPS also includes a policy called `authenticated` that requires a username and password for printing and other job operations.

## CUPS 1.2/OS X 10.5 DefaultShared

### Examples

    DefaultShared Yes
    DefaultShared No

### Description

The `DefaultShared` directive specifies whether printers are shared (published) by default. The default is `Yes`.

## Deny

### Examples

    <Location /path>
      ..
      Deny from All
      Deny from None
      Deny from *.example.com
      Deny from .example.com
      Deny from host.example.com
      Deny from nnn.*
      Deny from nnn.nnn.*
      Deny from nnn.nnn.nnn.*
      Deny from nnn.nnn.nnn.nnn
      Deny from nnn.nnn.nnn.nnn/mm
      Deny from nnn.nnn.nnn.nnn/mmm.mmm.mmm.mmm
      Deny from [xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx]
      Deny from [xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx]/mmm
      Deny from @LOCAL
      Deny from @IF(name)
    </Location>

### Description

The `Deny` directive specifies a hostname, IP address, or network that is denied access to the server. `Deny` directives are cumulative, so multiple `Deny` directives can be used to deny access for multiple hosts or networks.

Host and domain name matching require that you enable the `HostNameLookups` directive.

The `/mm` notation specifies a CIDR netmask, a shown in Table 1.

The `@LOCAL` name will deny access from all local interfaces. The `@IF(name)` name will deny access from the named interface. In both cases, CUPS only denies access from the network that the interface(s) are configured for - requests arriving on the interface from a foreign network will not be denied.

The `Deny` directive must appear inside a `Location` or `Limit` section.

## CUPS 1.4/OS X 10.6 DirtyCleanInterval

### Examples

    DirtyCleanInterval 1w
    DirtyCleanInterval 1d
    DirtyCleanInterval 1h
    DirtyCleanInterval 1m
    DirtyCleanInterval 30
    DirtyCleanInterval 0

### Description

The `DirtyCleanInterval` directive specifies the amount of time to wait before updating configuration and state files for printers, classes, subscriptions, and jobs in seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix). A value of `0` causes the update to occur as soon as possible, typically within a few milliseconds.

The default value is `30` (30 seconds).

## Encryption

### Examples

    <Location /path>
      ...
      Encryption Never
      Encryption IfRequested
      Encryption Required
    </Location>

### Description

The `Encryption` directive must appear instead a `Location` or `Limit` section and specifies the encryption settings for that location. The default setting is `IfRequested` for all locations.

## CUPS 1.3/OS X 10.5 ErrorPolicy

### Examples

    ErrorPolicy abort-job
    ErrorPolicy retry-job
    ErrorPolicy stop-printer

### Description

The `ErrorPolicy` directive defines the default policy that is used when a backend is unable to send a print job to the printer.

The following values are supported:

- `abort-job` - Abort the job and proceed with the next job in the queue
- `retry-job` - Retry the job after waiting for N seconds; the cupsd.conf `JobRetryInterval` directive controls the value of N
- `retry-this-job` - Retry the current job immediately and indefinitely.
- `stop-printer` - Stop the printer and keep the job for future printing; this is the default value

## CUPS 1.1.3 FilterLimit

### Examples

    FilterLimit 0
    FilterLimit 200
    FilterLimit 1000

### Description

The `FilterLimit` directive sets the maximum cost of all running job filters. It can be used to limit the number of filter programs that are run on a server to minimize disk, memory, and CPU resource problems. A limit of 0 disables filter limiting.

An average print to a non-PostScript printer needs a filter limit of about 200. A PostScript printer needs about half that (100). Setting the limit below these thresholds will effectively limit the scheduler to printing a single job at any time.

The default limit is 0.

## CUPS 1.1.16 FilterNice

### Examples

    FilterNice 0
    FilterNice 10
    FilterNice 19

### Description

The `FilterNice` directive sets the nice(1) value to assign to filter processes. The nice value ranges from 0, the highest priority, to 19, the lowest priority. The default is 0.

## CUPS 1.6/OS X 10.8 GSSServiceName

### Examples

    GSSServiceName http
    GSSServiceName ipp

### Description

The `GSSServiceName` directive sets the Kerberos service name to use. The default is `http` for compatibility with Microsoft Windows.

## HostNameLookups

### Examples

    HostNameLookups On
    HostNameLookups Off
    HostNameLookups Double

### Description

The `HostNameLookups` directive controls whether or not CUPS looks up the hostname for connecting clients. The `Double` setting causes CUPS to verify that the hostname resolved from the address matches one of the addresses returned for that hostname. `Double` lookups also prevent clients with unregistered addresses from connecting to your server.

The default is `Off` to avoid the potential server performance problems with hostname lookups. Set this option to `On` or `Double` only if absolutely required.

## CUPS 1.1.9 Include

### Examples

    Include filename
    Include /foo/bar/filename

### Description

The `Include` directive includes the named file in the `cupsd.conf` file. If no leading path is provided, the file is assumed to be relative to the `ServerRoot` directory.

## CUPS 1.5 JobPrivateAccess

### Examples

    JobPrivateAccess all
    JobPrivateAccess default
    JobPrivateAccess {user|@group|@ACL|@OWNER|@SYSTEM}+

### Description

The `JobPrivateAccess` directive specifies the access list for a job's private values. The "default" access list is "@OWNER @SYSTEM". "@ACL" maps to the printer's requesting-user-name-allowed or requesting-user-name-denied values.

The `JobPrivateAccess` directive must appear inside a `Policy` section.

## CUPS 1.5 JobPrivateValues

### Examples

    JobPrivateValues all
    JobPrivateValues default
    JobPrivateValues none
    JobPrivateValues attribute-name-1 [ ... attribute-name-N ]

### Description

The `JobPrivateValues` directive specifies the list of job values to make private. The "default" values are "job-name", "job-originating-host-name", "job-originating-user-name", and "phone".

The `JobPrivateValues` directive must appear inside a `Policy` section.

## CUPS 1.2/OS X 10.5 JobRetryInterval

### Examples

    JobRetryInterval 1w
    JobRetryInterval 1d
    JobRetryInterval 1h
    JobRetryInterval 1m
    JobRetryInterval 30

### Description

The `JobRetryInterval` directive specifies the amount of time to wait before retrying a job in seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix). This is typically used for fax queues but can also be used with normal print queues whose error policy is `retry-job` or `retry-current-job`.

The default is `30` (30 seconds).

## CUPS 1.4/OS X 10.6 JobKillDelay

### Examples

    JobKillDelay 1w
    JobKillDelay 1d
    JobKillDelay 1h
    JobKillDelay 1m
    JobKillDelay 30

### Description

The `JobKillDelay` directive specifies the amount of time to wait before killing the filters and backend associated with a canceled or held job in seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix).

The default is `30` (30 seconds).

## CUPS 1.2/OS X 10.5 JobRetryLimit

### Examples

    JobRetryLimit 5
    JobRetryLimit 50

### Description

The `JobRetryLimit` directive specifies the maximum number of times the scheduler will try to print a job. This is typically used for fax queues but can also be used with normal print queues whose error policy is `retry-job`. The default is 5 times.

## KeepAlive

### Examples

    KeepAlive On
    KeepAlive Off

### Description

The `KeepAlive` directive controls whether or not to support persistent HTTP connections. The default is `On`.

HTTP/1.1 clients automatically support persistent connections, while HTTP/1.0 clients must specifically request them using the `Keep-Alive` attribute in the `Connection:` field of each request.

## KeepAliveTimeout

### Examples

    KeepAliveTimeout 1w
    KeepAliveTimeout 1d
    KeepAliveTimeout 1h
    KeepAliveTimeout 1m
    KeepAliveTimeout 30

### Description

The `KeepAliveTimeout` directive controls how long a persistent HTTP connection will remain open after the last request in seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix).

The default is `30` (30 seconds).

## CUPS 1.1.7 Limit (Location)

### Examples

    <Location /path>
      <Limit GET POST>
      ...
      </Limit>

      <Limit ALL>
      ...
      </Limit>
    </Location>

### Description

The `Limit` directive groups access control directives for specific types of HTTP requests and must appear inside a `Location` section. Access can be limited for individual request types (`DELETE`, `GET`, `HEAD`, `OPTIONS`, `POST`, `PUT`, and `TRACE`) or for all request types (`ALL`). The request type names are case-sensitive for compatibility with Apache.

## CUPS 1.2/OS X 10.5 Limit (Policy)

### Examples

    <Policy name>
      <Limit CUPS-Add-Modify-Printer CUPS-Delete-Printer>
      ...
      </Limit>

      <Limit All>
      ...
      </Limit>
    </Policy>

### Description

When included in `Policy` sections, the `Limit` directive groups access control directives for specific IPP operations. Multiple operations can be listed, separated by spaces. Table 2 lists the supported operations.

Table 2: Supported IPP Operations
Operation Name | Description
--- | ---
All | All operations - used as the default limit for operations that are not listed
Cancel-Job | Cancel a job
Cancel-Subscription | Cancel a subscription
Create-Job | Create a new, empty job
Create-Job-Subscription | Creates a notification subscription on a job
Create-Printer-Subscription | Creates a notification subscription on a printer
CUPS-Accept-Jobs | Sets the printer-is-accepting-jobs value for a printer to true
CUPS-Add-Modify-Class | Adds or modifies a class
CUPS-Add-Modify-Printer | Adds or modifies a printer
CUPS-Authenticate-Job | Authenticates a job for printing
CUPS-Delete-Class | Deletes a class
CUPS-Delete-Printer | Deletes a printer
CUPS-Get-Classes | Gets a list of classes
CUPS-Get-Default | Gets the (network/server) default printer or class
CUPS-Get-Devices | Gets a list of available devices
CUPS-Get-PPDs | Gets a list of available manufacturers or drivers
CUPS-Get-Printers | Gets a list of printers and/or classes
CUPS-Move-Job | Moves a job to a new destination
CUPS-Reject-Jobs | Sets the printer-is-accepting-jobs value for a printer to false
CUPS-Set-Default | Sets the network/server default printer or class
Disable-Printer | Sets the printer-state value for a printer to stopped
Enable-Printer | Sets the printer-state value for a printer to idle/processing
Get-Job-Attributes | Gets information about a job
Get-Jobs | Gets a list of jobs
Get-Notifications | Gets a list of events
Get-Printer-Attributes | Gets information about a printer or class
Get-Subscription-Attributes | Gets information about a notification subscription
Get-Subscriptions | Gets a list of notification subscriptions
Hold-Job | Holds a job for printing
Pause-Printer | Sets the printer-state value for a printer to stopped
Print-Job | Creates a job with a single file for printing
Purge-Jobs | Removes all jobs from a printer
Release-Job | Releases a previously held job for printing
Renew-Subscription | Renews a notification subscription
Restart-Job | Reprints a job
Resume-Printer | Sets the printer-state value for a printer to idle/processing
Send-Document | Adds a file to an job created with Create-Job
Set-Job-Attributes | Changes job options
Validate-Job | Validates job options prior to printing

## CUPS 1.1.7 LimitExcept

### Examples

    <Location /path>
      <LimitExcept GET POST>
      ...
      </LimitExcept>
    </Location>

### Description

The `LimitExcept` directive groups access control directives for specific types of HTTP requests and must appear inside a `Location` section. Unlike the `Limit` directive, `LimitExcept` restricts access for all requests except those listed on the `LimitExcept` line.

## LimitRequestBody

### Examples

    LimitRequestBody 10485760
    LimitRequestBody 10m
    LimitRequestBody 0

### Description

The `LimitRequestBody` directive controls the maximum size of print files, IPP requests, and HTML form data in HTTP POST requests. The default limit is 0 which disables the limit check.

## Listen

### Examples

    Listen 127.0.0.1:631
    Listen 192.0.2.1:631
    Listen [::1]:631
    Listen *:631

### Description

The `Listen` directive specifies a network address and port to listen for connections. Multiple `Listen` directives can be provided to listen on multiple addresses.

The `Listen` directive is similar to the `Port` directive but allows you to restrict access to specific interfaces or networks.

## CUPS 1.1.7 ListenBackLog

### Examples

    ListenBackLog 5
    ListenBackLog 10

### Description

The `ListenBackLog` directive sets the maximum number of pending connections the scheduler will allow. This normally only affects very busy servers that have reached the `MaxClients` limit, but can also be triggered by large numbers of simultaneous connections. When the limit is reached, the operating system will refuse additional connections until the scheduler can accept the pending ones. The default is the OS-defined default limit, typically either 5 for older operating systems or 128 for newer operating systems.

## Location

### Examples

    <Location />
    ...
    </Location>

    <Location /admin>
    ...
    </Location>

    <Location /admin/conf>
    ...
    </Location>

    <Location /admin/log>
    ...
    </Location>

    <Location /classes>
    ...
    </Location>

    <Location /classes/name>
    ...
    </Location>

    <Location /jobs>
    ...
    </Location>

    <Location /printers>
    ...
    </Location>

    <Location /printers/name>
    ...
    </Location>

### Description

The `Location` directive specifies access control and authentication options for the specified HTTP resource or path. The `Allow`, `AuthType`, `Deny`, `Encryption`, `Limit`, `LimitExcept`, `Order`, `Require`, and `Satisfy` directives may all appear inside a location.

Note that more specific resources override the less specific ones. So the directives inside the `/printers/name` location will override ones from `/printers`. Directives inside `/printers` will override ones from `/`. None of the directives are inherited.

Table 3: Common Locations on the Server
Location | Description
--- | ---
`/` | The path for all get operations (get-printers, get-jobs, etc.)
`/admin` | The path for all administration operations (add-printer, delete-printer, start-printer, etc.)
`/admin/conf` | The path for access to the CUPS configuration files (cupsd.conf, client.conf, etc.)
`/admin/log` | The path for access to the CUPS log files (access_log, error_log, page_log)
`/classes` | The path for all classes
`/classes/name` | The resource for class `name`
`/jobs` | The path for all jobs (hold-job, release-job, etc.)
`/jobs/id` | The resource for job `id`
`/printers` | The path for all printers
`/printers/name` | The path for printer `name`
`/printers/name.ppd` | The PPD file path for printer `name`

## LogDebugHistory

### Examples

    LogDebugHistory 0
    LogDebugHistory 200

### Description

When `LogLevel` is not set to `debug` or `debug2`, the `LogDebugHistory` directive specifies the number of debugging messages that are logged when an error occurs during printing. The default is 200 messages. A value of 0 disables debugging history entirely and is not recommended.

## LogLevel

### Examples

    LogLevel none
    LogLevel emerg
    LogLevel alert
    LogLevel crit
    LogLevel error
    LogLevel warn
    LogLevel notice
    LogLevel info
    LogLevel debug
    LogLevel debug2

### Description

The `LogLevel` directive specifies the level of logging for the `ErrorLog` file. The following values are recognized (each level logs everything under the preceding levels):

- `none` - Log nothing
- `emerg` - Log emergency conditions that prevent the server from running
- `alert` - Log alerts that must be handled immediately
- `crit` - Log critical errors that don't prevent the server from running
- `error` - Log general errors
- `warn` - Log errors and warnings
- `notice` - Log temporary error conditions
- `info` - Log all requests and state changes
- `debug` - Log basic debugging information
- `debug2` - Log all debugging information

The default `LogLevel` is `warn`.

## LogTimeFormat

### Examples

    LogTimeFormat standard
    LogTimeFormat usecs

### Description

The `LogTimeFormat` directive specifies the format used for the date and time in the log files. `Standard` uses the standard Apache Common Log Format date and time while `usecs` adds microseconds. The default is `standard`.

## MaxClients

### Examples

    MaxClients 100
    MaxClients 1024

### Description

The `MaxClients` directive controls the maximum number of simultaneous clients that will be allowed by the server. The default is 100 clients.

> Note:

> Since each print job requires a file descriptor for the status pipe, the scheduler internally limits the `MaxClients` value to 1/3 of the available file descriptors to avoid possible problems when printing large numbers of jobs.

## CUPS 1.1.18 MaxClientsPerHost

### Examples

    MaxClientsPerHost 10

### Description

The `MaxClientsPerHost` directive controls the maximum number of simultaneous clients that will be allowed from a single host by the server. The default is the `MaxClients` value.

This directive provides a small measure of protection against Denial of Service attacks from a single host.

## CUPS 1.1.16 MaxCopies

### Examples

    MaxCopies 100
    MaxCopies 65535

### Description

The `MaxCopies` directive controls the maximum number of copies that a user can print of a job. The default is 9999 copies.

> Note:

> Most HP PCL laser printers internally limit the number of copies to 100.

## CUPS 1.6/OS X 10.8 MaxHoldTime

### Examples

    MaxHoldTime 10800
    MaxHoldTime 3h
    MaxHoldTime 180m
    MaxHoldTime 0

### Description

The `MaxHoldTime` directive controls the maximum number of seconds allowed for a job to remain in the "indefinite" hold state. The job is canceled automatically if it remains held indefinitely longer than the specified time interval in seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix).

The default setting is `0` which disables this functionality.

## MaxJobs

### Examples

    MaxJobs 100
    MaxJobs 9999
    MaxJobs 0

### Description

The `MaxJobs` directive controls the maximum number of jobs that are kept in memory. Once the number of jobs reaches the limit, the oldest completed job is automatically purged from the system to make room for the new one. If all of the known jobs are still pending or active then the new job will be rejected.

Setting the maximum size to 0 disables this functionality. The default setting is 500.

## CUPS 1.1.7 MaxJobsPerPrinter

### Examples

    MaxJobsPerPrinter 100
    MaxJobsPerPrinter 9999
    MaxJobsPerPrinter 0

### Description

The `MaxJobsPerPrinter` directive controls the maximum number of active jobs that are allowed for each printer or class. Once a printer or class reaches the limit, new jobs will be rejected until one of the active jobs is completed, stopped, aborted, or canceled.

Setting the maximum to 0 disables this functionality. The default setting is 0.

## CUPS 1.1.7 MaxJobsPerUser

### Examples

    MaxJobsPerUser 100
    MaxJobsPerUser 9999
    MaxJobsPerUser 0

### Description

The `MaxJobsPerUser` directive controls the maximum number of active jobs that are allowed for each user. Once a user reaches the limit, new jobs will be rejected until one of the active jobs is completed, stopped, aborted, or canceled.

Setting the maximum to 0 disables this functionality. The default setting is 0.

## CUPS 1.6/OS X 10.8 MaxJobTime

### Examples

    MaxJobTime 10800
    MaxJobTime 3h
    MaxJobTime 180m
    MaxJobTime 0

### Description

The `MaxJobTime` directive controls the maximum number of seconds allowed for a job to complete printing before it is considered "stuck". The job is canceled automatically if it takes longer than the specified time to complete in seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix).

Setting the maximum time to `0` disables this functionality. The default setting is `3h` (3 hours).

## MaxLogSize

### Examples

    MaxLogSize 1048576
    MaxLogSize 1m
    MaxLogSize 0

### Description

The `MaxLogSize` directive controls the maximum size of each log file. Once a log file reaches or exceeds the maximum size it is closed and renamed to filename.O. This allows you to rotate the logs automatically. The default size is 1048576 bytes (1MB).

Setting the maximum size to 0 disables log rotation.

## Deprecated MaxRequestSize

### Examples

    MaxRequestSize 10485760
    MaxRequestSize 10m
    MaxRequestSize 0

### Description

The `MaxRequestSize` directive controls the maximum size of print files, IPP requests, and HTML form data in HTTP POST requests. The default limit is 0 which disables the limit check.

This directive is deprecated and will be removed in a future CUPS release. Use the `LimitRequestBody` directive instead.

## CUPS 1.4/OS X 10.6 MultipleOperationTimeout

### Examples

    MultipleOperationTimeout 1w
    MultipleOperationTimeout 1d
    MultipleOperationTimeout 1h
    MultipleOperationTimeout 5m
    MultipleOperationTimeout 300

### Description

The `MultipleOperationTimeout` directive sets the maximum amount of time between files in a multi-file print job in seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix).

The default is `5m` (five minutes).

## Order

### Examples

    <Location /path>
      ...
      Order Allow,Deny
      Order Deny,Allow
    </Location>

### Description

The `Order` directive defines the default access control. The following values are supported:

- `allow,deny` - Deny requests by default, then check the `Allow` lines followed by the `Deny` lines
- `deny,allow` - Allow requests by default, then check the `Deny` lines followed by the `Allow` lines

The `Order` directive must appear inside a `Location` or `Limit` section.

## PageLogFormat

### Examples

    PageLogFormat %p %u %j %T %P %C %{job-billing} %{job-originating-host-name} %{job-name} %{media} %{sides}
    PageLogFormat PAGE %p %u %j %P %C %{job-billing} %{job-originating-host-name}

### Description

The `PageLogFormat` directive sets the format of lines that are logged to the page log file. Sequences beginning with percent (%) characters are replaced with the corresponding information, while all other characters are copied literally. The following percent sequences are recognized:

- `%%`: Inserts a single percent character.
- `%{name}`: Inserts the value of the specified IPP attribute.
- `%C`: Inserts the number of copies for the current page.
- `%P`: Inserts the current page number.
- `%T`: Inserts the current date and time in common log format.
- `%j`: Inserts the job ID.
- `%p`: Inserts the printer name.
- `%u`: Inserts the username.

The default is "%p %u %j %T %P %C %{job-billing} %{job-originating-host-name} %{job-name} %{media} %{sides}".

## CUPS 1.2/OS X 10.5 PassEnv

### Examples

    PassEnv MY_ENV_VARIABLE

### Description

The `PassEnv` directive specifies an environment variable that should be passed to child processes. Normally, the scheduler only passes the `DYLD_LIBRARY_PATH`, `LD_ASSUME_KERNEL`, `LD_LIBRARY_PATH`, `LD_PRELOAD`, `NLSPATH`, `SHLIB_PATH`, `TZ`, and `VGARGS` environment variables to child processes.

## CUPS 1.2/OS X 10.5 Policy

### Examples

    <Policy name>
      <Limit operation ... operation>
      ...
      </Limit>
      <Limit operation ... operation>
      ...
      </Limit>
      <Limit All>
      ...
      </Limit>
    </Policy>

### Description

The `Policy` directive specifies IPP operation access control limits. Each policy contains 1 or more `Limit` sections to set the access control limits for specific operations - user limits, authentication, encryption, and allowed/denied addresses, domains, or hosts. The `<Limit All>` section specifies the default access control limits for operations that are not listed.

Policies are named and associated with printers via the printer's operation policy setting (`printer-op-policy`). The default policy for the scheduler is specified using the `DefaultPolicy` directive.

## Port

### Examples

    Port 631
    Port 80

### Description

The `Port` directive specifies a port to listen on. Multiple `Port` lines can be specified to listen on multiple ports. The `Port` directive is equivalent to "`Listen *:nnn`". The default port is 631.

> Note:

> On systems that support IPv6, this directive will bind to both the IPv4 and IPv6 wildcard address.

## PreserveJobHistory

### Examples

    PreserveJobHistory On
    PreserveJobHistory Off
    PreserveJobHistory 1w
    PreserveJobHistory 7d
    PreserveJobHistory 168h
    PreserveJobHistory 10080m
    PreserveJobHistory 604800

### Description

The `PreserveJobHistory` directive controls whether the history of completed, canceled, or aborted print jobs is retained by the scheduler. A value of `On` preserves job information until the administrator purges it with the `cancel` command. A value of `Off` removes the job information as soon as each job is completed, canceled, or aborted. Numeric values preserve job information for the specified number of seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix).

The default value is `On`.

> Note:

> The `MaxJobs`, `MaxJobsPerPrinter`, and `MaxJobsPerUser` directives can cause job history to be discarded to make room for new jobs.

## PreserveJobFiles

### Examples

    PreserveJobFiles On
    PreserveJobFiles Off
    PreserveJobFiles 1w
    PreserveJobFiles 7d
    PreserveJobFiles 168h
    PreserveJobFiles 10080m
    PreserveJobFiles 604800

### Description

The `PreserveJobFiles` directive controls whether the document files of completed, canceled, or aborted print jobs are retained. Jobs can be restarted (and reprinted) as desired until they are purged.

A value of `On` preserves job files until the administrator purges them with the `cancel` command. A value of `Off` removes the job files as soon as each job is completed, canceled, or aborted. Numeric values preserve job files for the specified number of seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix).

The default value is `1d` (one day).

> Note:

> The `MaxJobs`, `MaxJobsPerPrinter`, `MaxJobsPerUser`, and `PreserveJobHistory` directives can cause job files to be discarded sooner than specified.

## CUPS 1.1.21 ReloadTimeout

### Examples

    ReloadTimeout 0
    ReloadTimeout 30

### Description

The `ReloadTimeout` directive specifies the number of seconds the scheduler will wait for active jobs to complete before doing a restart. The default is 30 seconds.

## CUPS 1.1.7 Require

### Examples

    <Location /path>
      ...
      Require group foo bar
      Require user john mary
      Require valid-user
      Require user @groupname
      Require user @SYSTEM
      Require user @OWNER
    </Location>

### Description

The `Require` directive specifies that authentication is required for the resource. The `group` keyword specifies that the authenticated user must be a member of one or more of the named groups that follow.

The `user` keyword specifies that the authenticated user must be one of the named users or groups that follow. Group names are specified using the "@" prefix.

The `valid-user` keyword specifies that any authenticated user may access the resource.

The default is to do no authentication. This directive must appear inside a `Location` or `Limit` section.

## RIPCache

### Examples

    RIPCache 128m
    RIPCache 1g
    RIPCache 2048k

### Description

The `RIPCache` directive sets the size of the memory cache used by Raster Image Processor ("RIP") filters such as `imagetoraster` and `pstoraster`. The size can be suffixed with a "k" for kilobytes, "m" for megabytes, or "g" for gigabytes. The default cache size is "128m", or 128 megabytes.

## CUPS 1.1.16 RootCertDuration

### Examples

    RootCertDuration 0
    RootCertDuration 1w
    RootCertDuration 1d
    RootCertDuration 1h
    RootCertDuration 5m
    RootCertDuration 300

### Description

The `RootCertDuration` directive specifies the amount of time the root certificate remains valid in seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix). The scheduler will generate a new certificate as needed when the given time interval has expired. If set to 0, the root certificate is generated only once on startup or on a restart.

The default is `5m` (five minutes).

## CUPS 1.1.7 Satisfy

### Examples

    <Location /path>
      ...
      Satisfy all
      Satisfy any
    </Location>

### Description

The `Satisfy` directive specifies whether all conditions must be satisfied to allow access to the resource. If set to `all`, then all authentication and access control conditions must be satisfied to allow access.

Setting `Satisfy` to `any` allows a user to gain access if the authentication or access control requirements are satisfied. For example, you might require authentication for remote access, but allow local access without authentication.

The default is `all`. This directive must appear inside a `Location` or `Limit` section.

## ServerAdmin

### Examples

    ServerAdmin user@host
    ServerAdmin root@foo.bar.com

### Description

The `ServerAdmin` directive identifies the email address for the administrator on the system. By default the administrator email address is `root@server`, where `server` is the `ServerName`.

## CUPS 1.3.10 ServerAlias

### Examples

    ServerAlias althost
    ServerAlias foo.example.com
    ServerAlias bar.example.com
    ServerAlias one.example.com two.example.com
    ServerAlias *

### Description

The `ServerAlias` directive specifies alternate names that the server is known by. By default it contains a list of all aliases associated with the `ServerName`. The special name "*" can be used to allow any hostname when accessing CUPS via an external network interfaces.

> Note

> The `ServerAlias` directive is used for HTTP Host header validation when clients connect to the scheduler from external interfaces. Using the special name "*" can expose your system to known browser-based DNS rebinding attacks, even when accessing sites through a firewall. If the auto-discovery of alternate names does not work, we recommend listing each alternate name with a ServerAlias directive instead of using "*".

## ServerName

### Examples

    ServerName foo.example.com
    ServerName myserver.example.com

### Description

The `ServerName` directive specifies the hostname that is reported to clients. By default the server name is the hostname.

## CUPS 1.1.21 ServerTokens

### Examples

    ServerTokens None
    ServerTokens ProductOnly
    ServerTokens Major
    ServerTokens Minor
    ServerTokens Minimal
    ServerTokens OS
    ServerTokens Full

### Description

The `ServerTokens` directive specifies the information that is included in the `Server:` header of all HTTP responses. Table 4 lists the token name along with the text that is returned. The default is `Minimal`.

Table 4: ServerToken Names and Values
Name | Value
--- | ---
None | No `Server:` header is returned
ProductOnly | "CUPS"
Major | "CUPS 1"
Minor | "CUPS 1.2"
Minimal | "CUPS 1.2.N" where N is the patch release
OS | "CUPS 1.2.N (UNAME)" where N is the patch release and UNAME is the output of the uname(1) command
Full | "CUPS 1.2.N (UNAME) IPP/1.1" where N is the patch release and UNAME is the output of the uname(1) command

## CUPS 1.2/OS X 10.5 SetEnv

### Examples

    SetEnv PATH /usr/lib/cups/filter:/bin:/usr/bin:/usr/local/bin
    SetEnv MY_ENV_VAR foo

### Description

The `SetEnv` directive specifies an environment variable that should be passed to child processes.

## SSLListen

### Examples

    SSLListen 127.0.0.1:443
    SSLListen 192.0.2.1:443

### Description

The `SSLListen` directive specifies a network address and port to listen for secure connections. Multiple `SSLListen` directives can be provided to listen on multiple addresses.

The `SSLListen` directive is similar to the `SSLPort` directive but allows you to restrict access to specific interfaces or networks.

## SSLOptions

### Examples

    SSLOptions None
    SSLOptions NoEmptyFragments

### Description

The `SSLOptions` directive specifies additional SSL/TLS protocol options to use for encrypted connected. Currently only two options are supported - `None` (the default) for the most secure mode and `NoEmptyFragments` to allow CUPS to work with Microsoft Windows with the FIPS conformance mode enabled.

## SSLPort

### Examples

    SSLPort 443

### Description

The `SSLPort` directive specifies a port to listen on for secure connections. Multiple `SSLPort` lines can be specified to listen on multiple ports.

## CUPS 1.6 StrictConformance

### Examples

    StrictConformance No
    StrictConformance Yes

### Description

The `StrictConformance` directive specifies whether the scheduler requires strict IPP conformance for client requests, for example to not allow document attributes in a Create-Job request. The default is `No`.

## CUPS 1.5 SubscriptionPrivateAccess

### Examples

    SubscriptionPrivateAccess all
    SubscriptionPrivateAccess default
    SubscriptionPrivateAccess {user|@group|@ACL|@OWNER|@SYSTEM}+

### Description

The `SubscriptionPrivateAccess` directive specifies the access list for a subscription's private values. The "default" access list is "@OWNER @SYSTEM". "@ACL" maps to the printer's requesting-user-name-allowed or requesting-user-name-denied values.

The `SubscriptionPrivateAccess` directive must appear inside a `Policy` section.

## CUPS 1.5 SubscriptionPrivateValues

### Examples

    SubscriptionPrivateValues all
    SubscriptionPrivateValues default
    SubscriptionPrivateValues none
    SubscriptionPrivateValues attribute-name-1 [ ... attribute-name-N ]

### Description

The `SubscriptionPrivateValues` directive specifies the list of subscription values to make private. The "default" values are "notify-events", "notify-pull-method", "notify-recipient-uri", "notify-subscriber-user-name", and "notify-user-data".

The `SubscriptionPrivateValues` directive must appear inside a `Policy` section.

## Timeout

### Examples

    Timeout 1w
    Timeout 1d
    Timeout 1h
    Timeout 5m
    Timeout 300

### Description

The `Timeout` directive controls the amount of time to wait before an active HTTP or IPP request times out in seconds (no suffix), minutes ("m" suffix), hours ("h" suffix), days ("d" suffix), or weeks ("w" suffix).

The default timeout is `5m` (five minutes).

## CUPS 1.5 WebInterface

### Examples

    WebInterface Yes
    WebInterface No

### Description

The `WebInterface` directive specifies whether the web interface is enabled. The default value is `No` on OS X and `Yes` on all other operating systems.