Tweak Settings - System

Accounts that can access a cPanel user account

This setting allows you to specify which users can log in to a cPanel account.

This setting defaults to Root, Account-Owner, and cPanel User.

• Root is the server owner.
• Account-Owner is the account's owner (the root user or a reseller).
• cPanel User is the cPanel account user.

Allow server-info and server-status

This setting allows you to specify additional IP addresses and hostnames that can access the example.com/server-status page, where example.com represents a domain's name. If you installed the mod_info Apache module, this setting also applies to the example.com/server-info page. Enter the desired IP addresses or hostnames in the text box, one IP address or hostname per line.

Allow cPanel users to install SSL Hosts

This setting allows you to specify whether to allow cPanel users to install SSL hosts.

This setting defaults to On.

Apache non-SSL IP/port

This setting allows you to specify a new port or IP address that Apache uses to listen for requests and serve web pages over an unsecured connection.

This setting defaults to 0.0.0.0:80, which indicates that Apache uses port 80 to serve content on an unsecured connection for all of your server's IP addresses.

Apache SSL port

This setting allows you to specify a new port or IP address that Apache uses to listen for requests and serve web pages over a secure connection.

This setting defaults to 0.0.0.0:443, which indicates that Apache uses port 443 to serve content on a secure connection for all of your server's IP addresses.

cPanel & WHM API Shell (for developers)

This setting allows you to add the following interfaces, which allow the root user and resellers to test API functions directly:

• WHM's API Shell interface (WHM >> Home >> Development >> API Shell)

• cPanel's API Shell interface (cPanel >> Home >> Advanced >> API Shell)

  Note:

  To enable this feature for cPanel, you must grant the API Shell feature to the desired root user and resellers in WHM's Feature Manager interface (WHM >> Home >> Packages >> Feature Manager), and then refresh your browser window.

This setting defaults to Off.

DNS server reload deferral time

This setting allows you to specify the time (in seconds) that the dnsadmin service waits before it restarts BIND. The system silently discards additional restart requests in this time period.

HTTPD deferred reload time

This setting allows you to specify the number of seconds that the system waits before it restarts the web server. The system silently discards additional restart requests in this time period.

This setting defaults to 0.

The number of seconds between ChkServd service checks

This setting allows you to specify the number of seconds between each chkservd daemon service check. You can specify any value between 60 and 7200.

This setting defaults to 300.

The number of times ChkServd allows a previous check to complete before termination

This setting allows you to specify the number of times that the chkservd daemon allows a check to complete before termination. You can specify any value between 1 and 20.

This setting defaults to 2.

The option to enable or disable ChkServd HTML notifications

This setting allows you to enable or disable HTML notifications for the chkservd daemon.

This setting defaults to On.

The option to enable or disable ChkServd recovery notifications

This setting allows you to enable or disable recovery notifications for the chkservd daemon.

This setting defaults to On.

Conserve memory

This setting allows you to specify whether to conserve memory (RAM) at the expense of more CPU usage and disk I/O.

This setting defaults to Off.

cpsrvd username domain lookup

This setting allows you to specify whether WHM automatically supplies a username (based on the account name) when a cPanel user enters a login password.

This setting defaults to Off.

Prevent cpsrvd from serving standard HTTP ports

This setting prevents the cpsrvd daemon from taking over the standard HTTP ports when you disable the system’s Web Server role. This action renders any cPanel & WHM features that depend on the standard HTTP ports partially or entirely unusable. These features include service subdomains, AutoSSL, Mailman, and BoxTrapper.

This setting defaults to Off.

Cache disk quota information

This setting allows you to specify whether WHM caches disk usage information. If you select On, the cache process may result in disk usage information that is up to 15 minutes out-of-date.

This setting defaults to On.

Reverse DNS lookup upon connect

This setting allows you to specify whether cPanel & WHM attempts to resolve a client’s IP address to a domain name whenever a user connects to a cPanel service.

This setting defaults to Off.

Age, in days, of content to purge from users' File Manager Trash

This setting determines the minimum age of files that the system will automatically purge from .trash folders in user home directories. These folders contain deleted files from cPanel's File Manager interface (cPanel >> Home >> Files >> File Manager). A value of 0 configures the server to purge all files from every user's.trash folder, regardless of age.

This setting defaults to Disabled.

Enable optimizations for the C compiler

This setting allows you to specify whether the compiler optimizes code for your system.

This setting defaults to Off.

Max HTTP submission size

This setting allows you to specify the maximum file size, in Megabytes, that a user can upload to your server. This setting applies to all uploads and form submissions in cPanel & WHM, which includes Webmail, cPanel's File Manager interface (cPanel >> Home >> Files >> File Manager), and phpMyAdmin.

Enter a value between 1 and 10240. This setting defaults to Unlimited.

File upload required free space

This setting allows you to specify the minimum filesystem quota space that the system requires after a file uploads to your server. This helps ensure that users do not meet or exceed their quota limits. This setting applies to all uploads and form submissions in cPanel & WHM, which includes Webmail, cPanel's File Manager interface (cPanel >> Home >> Files >> File Manager), and phpMyAdmin.

This setting defaults to 5 MB.

Interval, in days, between rebuilds of the FTP quota and disk usage data (applies to Pure-FTPd only)

This setting allows you to specify the number of days between rebuilds of the FTP quota and disk usage data for Pure-FTP.

This interval allows the system to consider account disk usage information for files that other processes modify or add to a user's root FTP directory. A higher setting will reduce disk I/O, but lower the accuracy of the usage data. A lower setting improves accuracy, but will consume more disk I/O.

This setting defaults to 30 days.

Depth to recurse for .htaccess checks

This setting allows you to specify the maximum number of directories deep to look for .htaccess files when you change the PHP handler. This setting defaults to 2.

For example, if the /home/user/public_html/ directory is your document root, and 2 is the value for this setting, the system searches the following directories for .htaccess files:

• /home/user/public_html/
• /home/user/public_html/directory1/
• /home/user/public_html/directory2/

The system does not search the following directory:

• /home/user/public_html/directory1/directorya/

Enable legacy warnings

This setting allows you to specify whether you receive warnings about features that future cPanel & WHM releases will deprecate.

This setting defaults to On.

Account invites for Subaccounts

This settings allow cPanel account users to send invitations to new Subaccount users via cPanel's  User Manager  interface (cPanel >> Home >> Preferences >> User Manager). An invitation includes a link to a time-sensitive page where the Subaccount user can set their own password rather than rely on the cPanel account user to set their password.

This setting defaults to On.

Listen on IPv6 Addresses

This setting causes the cpsrvd daemon, and other cPanel & WHM services, to listen on IPv6. If you do not enable this setting, WHM, cPanel, Webmail, and Web Disk will not function via IPv6.

This setting defaults to Off.

I/O priority level at which bandwidth usage is processed

This setting allows you to specify the server's I/O priority for bandwidth log processing. Enter a value between 0 and 7.

This setting defaults to 6.

I/O priority level at which stats logs are processed

This setting allows you to specify the server's I/O priority when it processes statistics logs. Enter a value between 0 and 7.

This setting defaults to 7.

I/O priority level at which nightly backups are run

This setting allows you to specify the disk's I/O priority for nightly backups. Enter a value between 0 and 7.

This setting defaults to 6.

I/O priority level at which cPanel-generated backups are run

This setting allows you to specify the server's I/O priority for cPanel-generated user backups. Enter a value between 0 and 7.

This setting defaults to 7.

I/O priority level for user-initiated processes

This setting allows you to specify the server's I/O priority for certain user-initiated processes. This setting applies to a few especially I/O-intensive user functions, such as actions that cPanel's File Manager interface (cPanel >> Home >> Files >> File Manager) initiates. Enter a value between 0 and 7.

This setting defaults to 6.

I/O priority level at which quota checks are run

This setting allows you to specify the server's I/O priority for quota checks. Enter a value between 0 and 7.

This setting defaults to 6.

I/O priority level at which FTP quota checks are run (when Pure-FTPd is enabled)

This setting allows you to specify the server's I/O priority for FTP quota checks for Pure-FTPd. Enter a value between 0 and 7.

This setting defaults to 6.

I/O priority level at which email_archive_maintenance is run

This setting allows you to specify the server’s I/O priority level for the email_archive_maintenance script. Enter a value between 0 and 7.

This setting defaults to 7.

I/O priority level at which dovecot_maintenance is run

This setting allows you to specify the server's I/O priority level for the dovecot_maintenance script, which cPanel & WHM uses to maintain mailboxes. Enter a value between 0 and 7.

This setting defaults to 7.

Use cPanel^® jailshell by default

This setting allows you to configure accounts to use the cPanel jailshell by default.

This setting defaults to Off.

Jailed /proc mount method

This setting allows you to permit the use of the /proc virtual filesystem in a jailshell.

You can choose from the following options:

• Always mount a full /proc — The /proc virtual filesystem has full privileges.

• Mount limited /proc for RHEL, CentOS, and CloudLinux™ 6, Full /proc for RHEL, CentOS, CloudLinux, or xenpv 5 or 7 
  

  • In version 6 of RHEL, CentOS, and CloudLinux, and on Amazon® Linux, the system limits the /proc virtual filesystem to the processes in the user's jailshell session.

  • In version 7 of RHEL, CentOS, and CloudLinux, the /proc virtual filesystem includes all processes.

• Mount limited /proc for RHEL, CentOS, and CloudLinux™ 6, No /proc for RHEL, CentOS, CloudLinux, or xenpv 5 or 7 
  
  • In version 6 of RHEL, CentOS, and CloudLinux, and on Amazon Linux, the system limits the /proc virtual filesystem to the processes in the user's jailshell session.
  • In version 7 of RHEL, CentOS, and CloudLinux, the system does not mount the /proc virtual filesystem inside the jail.

This setting defaults to Mount limited /proc for RHEL, CentOS, and CloudLinux™ 6, Full /proc for RHEL, CentOS, CloudLinux, or xenpv 5 or 7.

Jailed /bin mounted suid

This setting allows you to permit the use of the setuid option in the /bin directory in a jailshell.

System administrators who wish to run setuid commands, such as the /bin/ping command, may wish to use this setting.

This setting defaults to Off.

Jailed /usr/bin mounted suid

This setting allows you to permit the use of the setuid option in the /usr/bin directory in a jailshell.

System administrators who wish to run setuid commands (for example, the /usr/bin/crontab command) may wish to use this setting.

This setting defaults to Off.

Max cPanel process memory

This setting allows you to specify the maximum amount of memory that a cPanel process can use before the system automatically kills it. Select Unlimited if you do not want to impose a memory limit on cPanel processes.

This setting defaults to 768 MB.

Max cPanel/WHM/Webmail service handlers

This setting allows you to specify the maximum number of concurrent connections for the cPanel daemon, cpsrvd.

This setting defaults to 200.

Minimum time between Apache graceful restarts.

This setting allows you specify the number of seconds Apache will delay before it initiates a restart.

This setting defaults to 10.

Send language file changes to cPanel

This setting configures your system to send any changes to language files to cPanel so that we can improve our translations of interface text.

This setting defaults to On.

Remote WHM timeout

This setting allows you to specify the number of seconds to allow a connection between this server and other remote WHM servers to remain idle before it times out.

This setting defaults to 35 seconds.

Disk usage/quota bailout time

This setting allows you to specify the maximum amount of time, in seconds, during which the system may attempt to retrieve disk usage and quota information before it considers the data unavailable.

This setting defaults to 60 seconds.

Reset Password for cPanel accounts

This setting enables the Reset Password feature for cPanel account users. The Reset Password feature uses the account's contact email address to verify a password reset request. The email contains a security code that verifies whether the user can access to the Subaccount's contact email address as part of the password reset verification process. The link to request this email displays in the cPanel login interface.

This setting defaults to Off.

Reset Password for Subaccounts

This setting enables the Reset Password feature and new Subaccount invites for cPanel Subaccount users. The Reset Password feature uses the Subaccount's contact email address to verify a password reset request. The email contains a security code that verifies whether the user can access to the contact email address as part of the password reset verification process. The link to request this email displays in the cPanel login interface.

This setting defaults to Off.

Enable Linux kernel update during nightly maintenance

This setting allows you to specify whether to allow nightly updates to your Linux kernel. If you set this to On, the nightly updates will update the Linux kernel.

If your kernel updated, the system will notify you when you log in that you need to reboot your system.

This setting defaults to Off.

Server Locale

This setting allows you to specify the locale that the system uses whenever a user selects a cPanel locale that does not exist. This setting also allows you to specify the locale that the system uses whenever a user's web browser requests an invalid locale in the HTTP Accept-Language header. Set this value to a locale that administrators, resellers, and users can understand.

Send a notification when a user's backup has errors

This setting allows you to specify whether the server notifies you when a user’s cPanel backup file contains errors.

This setting defaults to On.

Allow other applications to run the cPanel and admin binaries

This setting allows you to specify whether cPanel and admin binaries run from applications other than the cPanel server daemon (cpsrvd). This setting is useful for advanced administrators who are familiar with Perl scripting and who wish to run cPanel from their own custom programs.

This setting defaults to Off.

ChkServd TCP check failure threshold

This setting allows you to specify the number of times that a chkservd daemon TCP check must fail before the system restarts the service and sends a notification. On heavily loaded systems, these types of service checks fail occasionally, which produces erroneous indications that services are down. This setting defaults to 3.

Number of seconds an SSH connection related to an account transfer may be inactive before timing out

This setting allows you to specify a number of seconds of inactivity after which account transfers' SSH connections time out. Enter any number between 900 and 172800.

This setting defaults to 1800 seconds.