/etc/sysconfig/network-scripts/ifcfg-eth0
IPADDR=x.x.x.x
GATEWAY=y.y.y.y
NETMASK=x.x.x.x
yum -y install openssh-server openssh-clients
chkconfig sshd on
service sshd start
netstat -tulpn | grep :22
vi /etc/sysconfig/iptables
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
If you want to restict access to 192.168.1.0/24, edit it as follows:-A RH-Firewall-1-INPUT -s 192.168.1.0/24 -m state --state NEW -p tcp --dport 22 -j ACCEPT
If your site uses IPv6, and you are editing ip6tables, use the line:-A RH-Firewall-1-INPUT -m tcp -p tcp --dport 22 -j ACCEPT
service iptables restart
service iptables save
service iptables stop
chkconfig iptables off
visudo
an ALL=(ALL) ALL
yum install gcc gcc-c++