1，shell 批量验证防火墙端口是否开通

[root@db-gitlab-harbor ~]# cat /tmp/ports.txt 
192.168.0.1 22
127.0.0.1 22
127.0.0.1 222
[root@db-gitlab-harbor ~]# 
[root@db-gitlab-harbor ~]# cat telnet.sh 
#! /bin/bash

cat /tmp/ports.txt |while read line
do
	nc -z -w 10 $line >/dev/null 2>&1
	if [ $? -eq 0 ]
	  then
		echo $line:ok
	else
		echo $line:false
	fi
done
[root@db-gitlab-harbor ~]#