CentOS

Basic Firewall Management

yum install system-config-firewall-tui

Reboot

reboot

Adduser

useradd <username>
passwd <username>

Proper Hostname

 http://www.jonasblog.com/setting-the-hostname-on-linux

SSH Config

nano /etc/ssh/sshd_config
permit root login no
change port
system-config-firewall-tui

• customize
• https://fedoraproject.org/wiki/How_to_edit_iptables_rules

Old Notes

• http://wiki.centos.org/TipsAndTricks/BecomingRoot
• https://www.centos.org/docs/4/html/rhel-sag-en-4/ch-basic-firewall.html
• https://www.centos.org/docs/5/html/Deployment_Guide-en-US/ch-fw.html
• http://people.csail.mit.edu/wentzlaf/faq/ssh_X.html
• https://www.centos.org/docs/5/html/5.2/Deployment_Guide/s2-basic-firewall-securitylevel.html
• Add Secondary IP Address http://gregsowell.com/?p=578