Centos6.4最小限インストール後の初期設定

1.基本的なコンパイラ·ライブラリをインストール
[root@localhost ~]# yum install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel cURL cURL-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel

2、時刻同期を設定
[root@localhost ~]# yum install ntp
[root@localhost ~]# vi /etc/crontab
*/5 * * * * ntpdate ntp.api.bz &> /dev/null

3、ファイルの最大数制限の最適化
[root@localhost ~]# vi /etc/security/limits.conf
* soft nofile 65535
* hard nofile 65535

4、TCP/IPカーネル·パラメータ最適化
[root@localhost ~]# > /etc/sysctl.conf
[root@localhost ~]# vi /etc/sysctl.conf
net.ipv4.ip_forward = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.tcp_sack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 262144
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.ip_local_port_range = 1024 65535
[root@localhost ~]# sysctl -p #設定有効

5、IPv6サポートを無効
[root@localhost ~]# chkconfig ip6tables off
[root@localhost ~]# vi /etc/modprobe.d/ipv6.conf
alias net-pf-10 off
alias ipv6 off

6、SELINUXを無効
[root@localhost ~]# vi /etc/sysconfig/selinux
……
SELINUX=disabled #ここにdisabledを設定する
……

7、SSHを設定
[root@localhost ~]# vi /etc/ssh/sshd_config
Port 65232
Protocol 2
PermitRootLogin no
UseDNS no

8、下記のサービスに加えて、不要なサービスをオフにする
crond
irqbalance
network
sshd
rsyslog
iptables

9、システムユーザファイルのアクセス許可の設定
chmod 644 /etc/passwd
chmod 600 /etc/shadow
chmod 644 /etc/group
chmod 600 /etc/gshadow

Source

Posted by arkgame