说明:
CentOS7服务器环境,默认SSH端口为22,考虑到安全方面问题,欲修改端口为62231(机器内网IP为192.168.1.31)python
ssh配置文件和iptables中端口开放配置调整时,原先的先不要移除,显式的同时打开22和62231端口,待配置完成确认62231端口访问正常后再逐个移除22端口的配置,防止配置过程当中出现差错致使服务器访问不了。linux
[root@localhost ~]# 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: 28
[root@localhost ~]# yum -y install semanage [root@localhost ~]# yum provides semanage 已加载插件:fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.cn99.com * extras: mirrors.cn99.com * updates: mirrors.cn99.com base/7/x86_64/filelists_db | 6.9 MB 00:00:11 extras/7/x86_64/filelists_db | 369 kB 00:00:00 updates/7/x86_64/filelists_db | 636 kB 00:00:00 policycoreutils-python-2.5-22.el7.x86_64 : SELinux policy core python utilities 源 :base 匹配来源: 文件名 :/usr/sbin/semanage [root@localhost ~]# yum -y install policycoreutils-python-2.5-22.el7.x86_64
[root@localhost ~]# semanage port -l|grep ssh ssh_port_t tcp 22 [root@localhost ~]# semanage port -a -t ssh_port_t -p tcp 62231 [root@localhost ~]# semanage port -l|grep ssh ssh_port_t tcp 62231, 22
[root@localhost ~]# vi /etc/ssh/sshd_config [root@localhost ~]# systemctl restart sshd
若是使用的是默认的firewall防火墙,则 [root@localhost ~]# firewall-cmd --permanent--add-port=62231/tcp [root@localhost ~]# firewall-cmd --reload [root@localhost ~]# firewall-cmd --permanent--query-port=62231/tcp 我使用的是iptables防火墙 [root@localhost ~]# iptables -I INPUT -p tcp -m state --state NEW --dport 62231 -j ACCEPT [root@localhost ~]# service iptables save [root@localhost ~]# iptables -L -n --line-numbers
[root@localhost ~]# reboot
[root@dev-02 ~]# ssh -p62231 root@192.168.1.31