(WHM >> Home >> Server Configuration >> Tweak Settings)
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. Note: If you disallow This setting allows you to specify additional IP addresses and hostnames that can access the Important: This setting allows you to specify whether to allow cPanel users to install SSL hosts. This setting defaults to On. 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 Warning: Enter an IP address to prevent Apache's ability to listen on all other IP addresses. This setting could deny HTTP traffic the ability to route correctly, which renders your site inaccessible to visitors. 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 Warning: Enter an IP address to prevent Apache's ability to listen on all other IP addresses. This setting could deny HTTPS traffic the ability to route correctly, which renders your site inaccessible to visitors. This setting allows you to add the following interfaces, which allow the 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 This setting defaults to Off. This setting allows you to specify the time (in seconds) that the Notes: 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 This setting allows you to specify the number of seconds between each This setting defaults to Note: Before you set a value below This setting allows you to specify the number of times that the This setting defaults to This setting allows you to enable or disable HTML notifications for the This setting defaults to On. This setting allows you to enable or disable recovery notifications for the This setting defaults to On. 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. 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. This setting prevents the This setting defaults to Off. 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. Warning: If you disable this setting, you may experience a large performance degradation. 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. Warning: If you enable this setting, you may degrade your server's performance. This setting determines the minimum age of files that the system will automatically purge from 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. Warning: On some systems, compiler optimizations can trigger a bug in system libraries. 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 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. Note: We enable quotas by default on new installations. This setting defaults to 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 This setting allows you to specify the maximum number of directories deep to look for . Warning: We strongly recommend that you do not enter a value that is higher than Note: This setting comments out any For example, if the The system does not search the following directory: This setting allows you to specify whether you receive warnings about features that future cPanel & WHM releases will deprecate. This setting defaults to On. Warning: If you disable this setting, you will not receive warnings about features that future releases remove. This could lead to a non-functional server when we remove these features. 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. This setting causes the This setting defaults to Off. Warning: After you enable this setting, you must run the following scripts from the command line: This setting allows you to specify the server's I/O priority for bandwidth log processing. Enter a value between This setting defaults to Notes: This setting allows you to specify the server's I/O priority when it processes statistics logs. Enter a value between This setting defaults to Notes: This setting allows you to specify the disk's I/O priority for nightly backups. Enter a value between This setting defaults to Notes: This setting allows you to specify the server's I/O priority for cPanel-generated user backups. Enter a value between This setting defaults to Notes: 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 This setting defaults to Notes: This setting allows you to specify the server's I/O priority for quota checks. Enter a value between This setting defaults to Notes: This setting allows you to specify the server's I/O priority for FTP quota checks for Pure-FTPd. Enter a value between This setting defaults to Notes: This setting allows you to specify the server’s I/O priority level for the This setting defaults to Notes: This setting allows you to specify the server's I/O priority level for the This setting defaults to Notes: This setting allows you to configure accounts to use the cPanel jailshell by default. This setting defaults to Off. Notes: This setting allows you to permit the use of the Note: If the system runs any version of Red Hat® Enterprise Linux (RHEL), CentOS, or CloudLinux™ on XenPV, the You can choose from the following options: In version 6 of RHEL, CentOS, and CloudLinux, and on Amazon® Linux, the system limits the In version 7 of RHEL, CentOS, and CloudLinux, the This setting defaults to Mount limited /proc for RHEL, CentOS, and CloudLinux™ 6, Full /proc for RHEL, CentOS, CloudLinux, or xenpv 5 or 7. This setting allows you to permit the use of the System administrators who wish to run This setting defaults to Off. Note: This setting does not affect servers that run CentOS 7, RHEL 7, or CloudLinux 7. This setting allows you to permit the use of the System administrators who wish to run This setting defaults to Off. Note: We do not recommend that you enable this setting. When you enable this setting, users can install a crontab that runs outside of their jailed shells. This action allows users to escape from the jailed environment. 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 Important: We strongly recommend that you specify a value of This setting allows you to specify the maximum number of concurrent connections for the cPanel daemon, This setting defaults to This setting allows you specify the number of seconds Apache will delay before it initiates a restart. Note: This only applies to deferrable-graceful restarts. This setting defaults to 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. 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 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 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. Important: To use this feature, the cPanel user must set the contact email address in cPanel's Contact Information interface (cPanel >> Home >> Preferences >> Contact Information). 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. Important: To use this feature, you must set the Subaccount's contact email address in cPanel's User Manager interface (cPanel >> Home >> Preferences >> User Manager). 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. 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 Warning: When you modify this setting and click Save, the system applies the new language to your WHM interface immediately. 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. This setting allows you to specify whether cPanel and admin binaries run from applications other than the cPanel server daemon ( This setting defaults to Off. This setting allows you to specify the number of times that a Notes: This setting allows you to specify a number of seconds of inactivity after which account transfers' SSH connections time out. Enter any number between This setting defaults to Accounts that can access a cPanel user account
root
user or a reseller).root
or reseller logins to cPanel accounts, the disallowed root
user or reseller cannot access the cPanel icon in WHM's List Accounts interface (WHM >> Home >> Account Information >> List Accounts), which provides access to the user's cPanel account.Allow server-info and server-status
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.mod_info
Apache module by default. To use this module, you must install it in EasyApache 4.Allow cPanel users to install SSL Hosts
Apache non-SSL IP/port
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
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)
root
user and resellers to test API functions directly:root
user and resellers in WHM's Feature Manager interface (WHM >> Home >> Packages >> Feature Manager), and then refresh your browser window.DNS server reload deferral time
dnsadmin
service waits before it restarts BIND. The system silently discards additional restart requests in this time period.300
or 600
seconds to prevent multiple subsequent restarts. 2
.HTTPD deferred reload time
0
.The number of seconds between ChkServd service checks
chkservd
daemon service check. You can specify any value between 60
and 7200
.300
.300
, we recommend that you use the /var/log/chksrvd
file to verify the length of your system's chkservd
checks. The settings that you choose in WHM's Service Manager interface (WHM >> Home >> Service Configuration >> Service Manager) affect the length of these checks.The number of times ChkServd allows a previous check to complete before termination
chkservd
daemon allows a check to complete before termination. You can specify any value between 1
and 20
.2
.The option to enable or disable ChkServd HTML notifications
chkservd
daemon.The option to enable or disable ChkServd recovery notifications
chkservd
daemon.Conserve memory
cpsrvd username domain lookup
Prevent cpsrvd from serving standard HTTP ports
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.Cache disk quota information
Reverse DNS lookup upon connect
Age, in days, of content to purge from users' File Manager Trash
.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.Max HTTP submission size
1
and 10240
. This setting defaults to Unlimited.File upload required free space
5
MB.Interval, in days, between rebuilds of the FTP quota and disk usage data (applies to Pure-FTPd only)
30
days.Depth to recurse for .htaccess checks
htaccess
files when you change the PHP handler. This setting defaults to 2
.10
. A value that is higher than 10
can degrade your server's performance.AddHandler
directive lines in your users' .htaccess
files that change how the system handles PHP./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/
/home/user/public_html/directory1/directorya/
Enable legacy warnings
Account invites for Subaccounts
Listen on IPv6 Addresses
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./scripts/restartsrv_cpsrvd
/scripts/restartsrv_cpdavd
/scripts/restartsrv_nsd
I/O priority level at which bandwidth usage is processed
0
and 7
.6
.ionice
, and ionice
must exist on the server, for this setting to function properly.0
grants the highest priority, while a value of 7
grants the lowest.I/O priority level at which stats logs are processed
0
and 7
.7
.ionice
, and ionice
must exist on the server, for this setting to function properly.0
grants the highest priority, while a value of 7
grants the lowest.I/O priority level at which nightly backups are run
0
and 7
.6
.ionice
, and ionice
must exist on the server, for this setting to function properly.0
grants the highest priority, while a value of 7
grants the lowest.I/O priority level at which cPanel-generated backups are run
0
and 7
.7
.ionice
, and ionice
must exist on the server, for this setting to function properly.0
grants the highest priority, while a value of 7
grants the lowest.I/O priority level for user-initiated processes
0
and 7
.6
.ionice
, and ionice
must exist on the server, for this setting to function properly.0
grants the highest priority, while a value of 7
grants the lowest.I/O priority level at which quota checks are run
0
and 7
.6
.ionice
, and ionice
must exist on the server, for this setting to function properly.0
grants the highest priority, while a value of 7
grants the lowest.I/O priority level at which FTP quota checks are run (when Pure-FTPd is enabled)
0
and 7
.6
.ionice
, and ionice
must exist on the server, for this setting to function properly.0
grants the highest priority, while a value of 7
grants the lowest.I/O priority level at which email_archive_maintenance is run
email_archive_maintenance
script. Enter a value between 0
and 7
.7
.ionice
, and ionice
must exist on the server, for this setting to function properly.0
grants the highest priority, while a value of 7
grants the lowest.I/O priority level at which dovecot_maintenance is run
dovecot_maintenance
script, which cPanel & WHM uses to maintain mailboxes. Enter a value between 0
and 7
.7
.ionice
, and ionice
must exist on the server, for this setting to function properly.0
grants the highest priority, while a value of 7
grants the lowest.Use cPanel® jailshell by default
nosetuid
option. The nosetuid
option blocks the operation of setuid
and setgid
commands, such as the ping
command. However, this does not apply to Exim's /usr/sbin/
directory.Jailed /proc mount method
/proc
virtual filesystem in a jailshell./proc
virtual filesystem inside of the jailshell behaves in the same way that it does on version 5 of RHEL, CentOS, or CloudLinux./proc
virtual filesystem has full privileges./proc
virtual filesystem to the processes in the user's jailshell session./proc
virtual filesystem includes all processes./proc
virtual filesystem to the processes in the user's jailshell session./proc
virtual filesystem inside the jail.Jailed /bin mounted suid
setuid
option in the /bin
directory in a jailshell.setuid
commands, such as the /bin/ping
command, may wish to use this setting.Jailed /usr/bin mounted suid
setuid
option in the /usr/bin
directory in a jailshell.setuid
commands (for example, the /usr/bin/crontab
command) may wish to use this setting.Max cPanel process memory
768
MB.512
or higher.Max cPanel/WHM/Webmail service handlers
cpsrvd
.200
.Minimum time between Apache graceful restarts.
10
.Send language file changes to cPanel
Remote WHM timeout
35
seconds.Disk usage/quota bailout time
60
seconds.Reset Password for cPanel accounts
Reset Password for Subaccounts
Enable Linux kernel update during nightly maintenance
Server Locale
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
Allow other applications to run the cPanel and admin binaries
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.ChkServd TCP check failure threshold
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
900
and 172800
.1800
seconds
.
Additional documentation
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