Information on cPanel Service Daemons

1
Information on cPanel Service Daemons
2
Table of Contents

• Introduction
• Web Server
• Daemons on cPanel WHM Servers
• Daemons on cPanel WHM Servers (Continued)
• Daemons on cPanel WHM Servers (Continued 1)

• Daemons on cPanel WHM Servers (Continued 2)
• Daemons on cPanel WHM Servers (Continued 3)
• Daemons on cPanel WHM Servers (Continued 4)
• Daemons on cPanel WHM Servers (Continued 5)
• Daemons on cPanel WHM Servers (Continued 6)

3
Introduction

• Information is being provided here on the
  services (daemons) which exist on cPanel WHM
  servers. A daemon is a process that runs in the
  servers background. It isnt under the control
  of the user.
• The WHM API 1 servicestatus function needs to be
  run in order to view the complete list of daemons
  on the server. The Service Manager interface in
  WHM needs to be used for viewing a list of
  daemons that can be enabled and monitored through
  the interface.
• WHM gtgt Home gtgt Service Configuration gtgt
  Service Manager
• It needs to be mentioned here that in the version
  76 and the later versions of cPanel WHM, a
  services availability is affected by certain
  server profile configurations.

4
Web Server

• A web server is a server that is used for the
  purpose of web hosting by web hosting companies.
  Web hosting is the service through which websites
  are made accessible online. The web contents of
  websites are stored on web servers. These files
  include HTML documents, videos, images, fonts,
  JavaScript files, CSS stylesheets, etc.
• Web hosting can be of many types, such as shared,
  dedicated, reseller, cloud, VPS, and WordPress.
  The Top Cloud Hosting, the Best Linux
  Dedicated Hosting, the Best Windows Shared
  Hosting are some of the terms that are used to
  refer to the most popular hosting services.
• In the following slides, certain daemons will be
  described along with their service names.

5
Daemons on cPanel WHM Servers

• The following services (daemons) exist on cPanel
  WHM servers
• apache_php_fpm The performance of the PHP-based
  internal applications of EasyApache 4 is improved
  by this daemon. Its service name is PHP-FPM
  service for Apache. This is only available on
  those systems that run EasyApache 4. The PHP-FPM
  daemon cannot be installed or removed in this
  interface.
• Clamd The server is scanned for malicious
  programs by this daemon. The Manage Plugins
  interface in WHM is used for installing or
  uninstalling ClamAV. Its service name is ClamAV
  Daemon.
• cpanel-dovecot-solr - Fast search capabilities
  with regard to IMAP mailboxes is provided by this
  daemon. Manage Plugins interface in WHM needs to
  be used for installing or uninstalling IMAP
  Full-Text Search. Its service name is IMAP
  Full-Text Search (FTS) Indexing (Powered by
  Apache Solr).
• cpanel_php_fpm The performance of PHP-based
  internal applications, which ship with cPanel
  WHM, is improved by this daemon. These include
  phpMyAdmin, phpPgAdmin, Webmail applications and
  any user-installed, third-party PHP application.
  Its service name is PHP-FPM service for cPanel
  Daemons. A maximum of 10 concurrent processes per
  user will be accelerated by this service.

6
Daemons on cPanel WHM Servers (Continued)

• cpanellogd cPanel WHM log files are
  compressed and archived into a single file for
  each type by this daemon. It is done at the end
  of every month. Its service name is cPanel Log
  and Bandwidth Processor.
• cpdavd A set of HTTP extensions is enabled by
  this daemon. These extensions let users manage
  their websites remotely. You should not disable
  this daemon if you want to host others websites
  on your own web server. Its service name is
  cPanel DAV Daemon.
• cpgreylistd The service of Greylisting is
  managed by this daemon. This service protects the
  server against spam from unrecognized sources.
  Its service name is cPanel Greylisting Daemon.
• cphulkd cPHulk Brute Force Protection is
  managed by this daemon. This service provides
  protection to the server against brute force
  attacks. Its service name is cPHulk Daemon.

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Daemons on cPanel WHM Servers (Continued 1)

• cpsrvd This daemon functions as the application
  server for Webmail services, cPanel and WHM. Its
  service name is cPanel Server Daemon.
• crond It is the cron scheduling daemon. Its
  service name is Cron Daemon.
• dnsadmin It runs as a standalone daemon. It
  aids in enhancing speed but causes an increase in
  the memory usage. This option should be
  deselected when multiple dnsadmin processes are
  being used for zone-related actions. Its service
  name is cPanel DNS (Domain Name System) Admin
  Cache.
• exim Its service name is Exim Mail Server. The
  SMTP mail server daemon is that part of your mail
  server which receives and sends mails. It is
  recommended that this feature be enabled and
  monitored for most servers.

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Daemons on cPanel WHM Servers (Continued 2)

• exim-altport Its service name is Exim Mail
  Server (on another port). This is an option for
  configuring Exim to listen to an additional port.
  In it, the additional port number needs to be
  entered on which Exim is supposed to run. By
  default, 25, 465 and 587 are the ports to which
  Exim listens.
• ftpd The FTP server is run by the FTP server
  daemon. This feature should be enabled when
  others websites are hosted on your web server.
  This feature needs to be monitored. Its service
  name is FTP (File Transfer Protocol) Server.
• httpd Its service name is Web Server. This
  daemon processes visitors HTTP requests. This
  feature needs to be enabled for hosting websites
  with your web server. When this daemon is
  disabled, the cpsrvd daemon assumes control over
  HTTP on the ports, 80 and 443.
• imap This daemon for Dovecot processes the way
  in which the users download their mail. It is
  recommended that this daemon be monitored. Its
  service name is IMAP (Internet Mail Access
  Protocol) Server.

9
1-800-123 -8156

• Whoa! Thats a big number, arent you
  proud?

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Daemons on cPanel WHM Servers (Continued 3)

• ipaliases Its service name is IP (Internet
  Protocol) Aliases. It enables the addition of
  more than one IP address to a network adapter.
  This configuration can be used to run multiple
  connections on a single network, wherein an
  additional purpose is served by each connection.
• lmtp Its service name is LMTP (Local Mail
  Transport Protocol) Server. The LMTP server lets
  Exim connect to the Dovecot mail server.
• mailman Its service name is Mailman. The
  creation of a single email address for sending
  mail to many email addresses is ensured by the
  Mailman mailing list manager for the users. The
  Mailman service is not started by the system
  until at least one mailing list is hosted by the
  server.
• mysql Its service name is MySQL or MariaDB
  Server. Database queries are processed by the
  MySQL database server. This feature or the
  postgresql server needs to be enabled if any
  content management systems or applications which
  need a database are supposed to be hosted. Since
  the system does not monitor this daemon by
  default, it is recommended that this daemon be
  monitored.

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Daemons on cPanel WHM Servers (Continued 4)

• .
• named The nameservers are run by the BIND
  (Berkeley Internet Name Domain), NSD, MyDNS, or
  PowerDNS daemon. This daemon should only be
  enabled when you want to use your own
  nameservers. Its service name is DNS (Domain Name
  System) Server.
• nscd A cache for name service requests is
  managed by this daemon. It is recommended that
  this service be only enabled on servers that have
  at least 1,000 MB of available memory. Its
  service name is Name Service Cache Daemon.
• P0f Its service name is Passive OS (Operating
  System) Fingerprinting Daemon. The p0f (Passive
  OS Fingerprinting) daemon ensures that the
  operating system of the visitor is reported along
  with other information with regard to email
  notifications which are requested by the system
  administrator in the interface, Contact Manager.
  This information proves to be helpful for a
  system administrator as it helps him to quickly
  identify those visitors that trigger events which
  cause alerts. This information is used by the
  spam prevention and cPHulk systems for
  identifying potential spammers and brute force
  attacks. When this daemon is disabled, the
  visitor information will no longer be contained
  in the notifications footers.

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Daemons on cPanel WHM Servers (Continued 5)

• pop The way in which users will download their
  mail is processed by the POP3 daemon. The
  monitoring of this daemon is strongly
  recommended. That is because the system does not
  monitor this daemon by default. Its service name
  is POP3 (Post Office Protocol 3) Server.
• Postgresql Database queries are processed by
  the PostgreSQL database server. Either this
  feature or the mysqld server need to be enabled
  when any content management system or such
  applications which require a database need to be
  hosted. In the version 76 and the later versions
  in cPanel WHM, this service is disabled by the
  Mail Node server profile. Its service name is
  PostgresSQL Server.
• queueprocd Its service name is TaskQueue
  Processor. The task queue is processed
  periodically by the TaskQueue Processor. It is
  present in the directory, /usr/local/cpanel/libexe
  c.
• rsyslogd Its service name is System Logger
  Daemon and it is highly recommended that this
  daemon be enabled. The web server is monitored by
  the system log daemon. It logs the system
  activity.

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Daemons on cPanel WHM Servers (Continued 6)

• spamd Its service name is Apache SpamAssassin.
  This daemon tries to filter spam messages. When
  you disable this daemon, ensure to disable it in
  the Tweak Settings interface in WHM. WHM gtgt Home
  gtgt Server Configuration gtgt Tweak Settings
•  sshd Its service name is SSH (Secure Shell)
  Daemon. This daemon lets the users connect to the
  server in a terminal session via SSH.
•  syslogd Its service name is syslog System
  Logger Daemon. The monitoring as well as the
  logging system information of the web server is
  handled by this daemon.
•  tailwatchd Its service name is TailWatch
  Daemon. Certain activities of a log file are
  monitored by the TailWatch daemon. Subsequently,
  an action is performed by it, depending on the
  activity.
•  tomcat Its service name is Tomcat Server.
  Tomcat is essentially an Apache module. A web
  server is provided by it, in addition to the
  Apache web server. New installations of Tomcat
  are not supported by EasyApache 3.

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