怎么修改ssh远程端口脚本？

Posted 2020-08-06

vi  port_change.sh 将下面代码复制粘贴到脚本里,然后bash port_change.sh 后接要修改的端口号

 

#!/bin/bash

##Write By ZaLinux

 

if [ $# != 1 ];then

 

echo "please input new ssh port"

exit

 

else

 

cat /etc/ssh/sshd_config |grep ^Port

if [ $? == 0 ];then

 

port=`cat /etc/ssh/sshd_config |grep ^Port`

oldport=`echo $port|awk {print $2}`

 

sed -i -e "/^Port/s/$port/Port $1/" /etc/ssh/sshd_config

service sshd restart

iptables -D INPUT -p tcp --dport $oldport -j ACCEPT

iptables -I INPUT -p tcp --dport $1 -j ACCEPT

service iptables save

 

else

 

sed -i -e "/^#Port/a\$1" /etc/ssh/sshd_config

service sshd restart

iptables -I INPUT -p tcp --dport $1 -j ACCEPT

fi

fi

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