ようやく重い腰をあげて・・・VPSの利用を開始しました。
いろいろ設定。

1. root でログイン
コントロールパネルからOS起動！

2. ユーザー作成

# adduser username
# chpasswd
username:userpassword
ctrl+D

root パスワード変更

# passwd
パスワード

3. SSH設定
rootログインを禁止

# vi /etc/ssh/sshd_config

#PermitRootLogin yes
PermitRootLogin no

# /etc/init.d/sshd restart

4. iptables

# /sbin/chkconfig iptables --list
iptables        0:off   1:off   2:on    3:on    4:on    5:on    6:off
# /sbin/chkconfig iptables off
# /sbin/chkconfig iptables --list
iptables        0:off   1:off   2:off   3:off   4:off   5:off   6:off

# /sbin/iptables -P INPUT ACCEPT
# /sbin/iptables -P OUTPUT ACCEPT
# /sbin/iptables -P FORWARD DROP
# /sbin/iptables -F
# /sbin/iptables -A INPUT -i lo -j ACCEPT
# /sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT
# /sbin/iptables -A INPUT -p tcp --dport 22 -j ACCEPT
# /sbin/iptables -A INPUT -m state -state ESTABLISHED,RE                                                                                        LATED -j ACCEPT
Bad argument `ESTABLISHED,RELATED'
Try `iptables -h' or 'iptables --help' for more information.
# /sbin/iptables -A INPUT -m state --state ESTABLISHED,R                                                                                        ELATED -j ACCEPT
# /sbin/iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:http
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ssh
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTAB                                                                                        LISHED

Chain FORWARD (policy DROP)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

# /sbin/iptables -P INPUT DROP
# /etc/init.d/iptables save
Saving firewall rules to /etc/sysconfig/iptables:          [  OK  ]
# /sbin/init.d/iptables restart