CentOS 关闭防火墙

CentOS 6:

1) 永久性生效,重启后不会复原

开启: chkconfig iptables on

关闭: chkconfig iptables off

2) 即时生效,重启后复原

开启: service iptables start

关闭: service iptables stop

CentOS 7:

systemctl start firewalld.service#启动firewall
systemctl stop firewalld.service#停止firewall
systemctl disable firewalld.service#禁止firewall开机启动

 

查询TCP连接情况:

 netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'

查询端口占用情况:

 netstat   -anp   |   grep  portno(例如:netstat –apn | grep 80)

发表评论

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

使用新浪微博登陆