Customizing server out-of-network updates

Due to business needs, need to limit the server's outbound download, only in 00-17 points this time period in order to download resources, other times do not run out of the network download. So decided to use iptables to do a limit, this is the most simple prescription, nonsense not much to say, look at the script.  #!/bin/bash  re_log () {     time=$ (date  "+%Y%m%d %T")       echo -e  "[$Time] $1"  >>/tmp/change_iptables.log }          change_iptables () {           from=$1     to=$2           echo  "copy  $from  to  $to ..."      cp /etc/sysconfig/iptables  /etc/sysconfig/iptables.bak      cp -rf  $from   $to           if [ $? -ge 1 ];then        re_log  "Copy   $from  to  $to.  failed. "      else        re_log  "copy  $from  to  $to.  success. "      fi    # service iptables status | |  service iptables start     service iptables restart      }limit () {        change_iptables /root/ Workspace/iptables_drop /etc/sysconfig/iptables}open () {         change_iptables /root/workspace/iptables /etc/sysconfig/iptables}case $1 in          --limit|limit)         limit         ;;         --open|open)          open        ;;         *)                 echo   "Usage: $0  limit|open"                  echo  "Ex: $0 open"                  exit          ;; Esac add_crond () {        sed -i  '/\/root\/workspace\/ iptables.sh/d '  /etc/crontab        echo -e  ' */5  18-23 * * * root /root/workspace/iptables.sh limit &>/dev/null "  >>/etc/crontab        echo -e  "*/5 00-17  * * * root /root/workspace/iptables.sh open &>/dev/null " > >/etc/crontab }&Nbsp;add_crond 

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Customizing server out-of-network updates