База на знаења

swap - twice the server's RAM
/ - 40G (smaller if you want to use separate /var and /home)
/boot - 200M
/tmp - 2G
more for /var/lib/mysql to store more databases
/home - grow to fill the disk

Network

Set IP address: edit /etc/sysconfig/network-scripts/ifcfg-eth?. The cPanel installation guide recommends against using NAT.
Set fully qualified domain name (FQDN): edit /etc/sysconfig/network. cPanel allows 3rd level domain names (cp.example.com) only.

Base system installation

Install minimal CentOS.
Check for package groups installed (yum grouplist). Remove (yum groupremove) all of:

• FTP Server
• GNOME Desktop Environment
• KDE (K Desktop Environment)
• Mail Server or E-mail Server
• Mono
• Web Server
• X Window System

For minimal installation only "E-mail server" was installed by default.
Install perl (yum install perl), wget (yum install wget)
Disable SELinux: edit /etc/selinux/config, set "SELINUX=disabled"
Disable iptables: chkconfig iptables off, chkconfig ip6tables off

cPanel installation

cd /home
wget -N http://httpupdate.cpanel.net/latest
sh latest

Post-installation configuration

You can enable firewall now. The best choice is to install CSF for managing firewall rules under WHM menus:

wget http://www.configserver.com/free/csf.tgz && tar -xzf csf.tgz && cd csf && sh install.sh
edit /etc/csf/csf.conf, set TESTING="0" and restart csf (csf -r)
or you can enable iptables (chkconfig iptables on, chkconfig ip6tables on) and open custom ports:

• 20 ” FTP TCP inbound/outbound
• 21 ” FTP TCP, UDP inbound/outbound
• 22 ” SSH TCP inbound
• 25 ” SMTP TCP inbound/outbound
• 26 ” SMTP TCP inbound/outbound
• 37 ” rdate TCP outbound
• 43 ” whois TCP outbound
• 53 ” DNS TCP/UDP inbound/outbound (inbound is only needed if you run your own public DNS server)
• 80 ” HTTP TCP inbound/outbound
• 110 ” POP3 TCP inbound
• 113 ” ident TCP outbound
• 143 ” IMAP4 TCP inbound
• 443 ” HTTPS TCP inbound
• 465 ” SMTP TLS/SSL TCP/UDP inbound/outbound
• 783 ” SpamAssassin TCP/UDP inbound
• 873 ” rsync TCP/UDP outbound
• 993 ” IMAP4 SSL TCP inbound
• 995 ” POP3 SSL TCP inbound
• 2077 ” WebDAV TCP/UDP inbound/outbound
• 2078 ” WebDAV SSL TCP/UDP inbound/outbound
• 2082 ” cPanel TCP inbound
• 2083 ” cPanel SSL TCP inbound
• 2086 ” WHM TCP inbound
• 2087 ” WHM SSL TCP inbound
• 2089 ” cPanel license TCP outbound
• 2095 ” Webmail TCP inbound
• 2096 ” Webmail SSL TCP inbound
• 3306 ” MySQL TCP (only if you need to connect remotely)
• 6666 ” Chat TCP inbound

Configure WHM (https://<ip addr>:2087) and cPanel (https://<ip addr>:2083) accordingly to your needs.

You can find the latest installation guide at: cPanel official documentation