CentOS7开发环境搭建(2)

关闭SELinux

# 查看
$ getenforce
Disabled
$ sestatus
SELinux status:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   enforcing
Mode from config file:          enforcing
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Max kernel policy version:      31# 临时关闭
setenforce 0# 永久关闭
# 将SELINUX=enforcing改为SELINUX=disabled
sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config
# 需要重启机器才能生效

iptables

【安装iptables】yum install -y iptables iptables-services

systemctl start iptables #启动
systemctl status iptables #查看运行状态
systemctl restart iptables.service #重启
systemctl stop iptables.service #停止systemctl enable iptables.service #设置开机启动
systemctl disable iptables.service #禁止开机启动

查看iptables规则

# 直接查看规则文件
[root@callinglove ~]# cat /etc/sysconfig/iptables
# sample configuration for iptables service
# you can edit this manually or use system-config-firewall
# please do not ask us to add additional ports/services to this default configuration
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT# 使用命令查看规则
[root@callinglove ~]# iptables -nL --line-number
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination         
1    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0            state RELATED,ESTABLISHED
2    ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
3    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
4    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            state NEW tcp dpt:22
5    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            state NEW tcp dpt:3306
6    REJECT     all  --  0.0.0.0/0            0.0.0.0/0            reject-with icmp-host-prohibitedChain FORWARD (policy ACCEPT)
num  target     prot opt source               destination         
1    REJECT     all  --  0.0.0.0/0            0.0.0.0/0            reject-with icmp-host-prohibitedChain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination