● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2019-05-01 02:28:27 CST; 8s ago
Docs: man:firewalld(1)
Process: 17012 ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS (code=exited, status=1/FAILURE)
Main PID: 17012 (code=exited, status=1/FAILURE)
May 01 02:28:27 VM_75_146_centos systemd[1]: Starting firewalld - dynamic firewall daemon...
May 01 02:28:27 VM_75_146_centos systemd[1]: firewalld.service: main process exited, code=exited, status=1/FAILURE
May 01 02:28:27 VM_75_146_centos systemd[1]: Failed to start firewalld - dynamic firewall daemon.
May 01 02:28:27 VM_75_146_centos systemd[1]: Unit firewalld.service entered failed state.
May 01 02:28:27 VM_75_146_centos systemd[1]: firewalld.service failed.
centos7防火墙关闭后启动不了。
原因:
firewalld依赖于python,由于之前安装python3的时候,将默认python命令的别名指向了python3,造成无法启动
解决办法:
1、先找到firewalld的位置
[root@VM_75_146_centos ~]# which firewalld
/usr/sbin/firewalld
2、将/usr/sbin/firewalld文件的第一行修改为旧的python
vim /usr/sbin/firewalld
#!/usr/bin/python2 -Es
# -*- coding: utf-8 -*-
将原来的python改为python2即可。