Linux setup DDNS server automatic Update script

Problem Description: The client is a dynamic IP, after each network to Nsupdate to the client's hostname and IP map to update to the DNS server

The command is as follows:

　　

Nsupdate-k k*****. Key192. *.*.*        #dns server IP address>Update Delete yourfqdn A Delete A your new IP

This kind of efficiency is a little low, so I wrote a script to update. Paste my script directly. Script: Http://pan.baidu.com/s/1lhlAu

#!/bin/Bash
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# # Author:[email Protected]
#########################################PATH=/sbin:/bin:/usr/sbin:/usr/Binexport pathusage () {Echo "usage:$0 [-I interface] [-D basedir] [-H hostname] [-t TTL] [-s servername] [-K keyfile] [-C ClientIP] [-M Testdomai N]"        Echo "Default:"        Echo "-I eth0-d/usr/local/ddns-t 600-k/usr/local/ddns/*.key"        Echo ""        Echo "Notice: If your own host is DNS Server, then you cannot change your own hostname with IP"        Echo "If you don't know what your DNS server is, add the-m parameter, followed by the test domain name, eg:$0-m swu.edu.cn"        Echo "Notice:if your PC is your DNS Server, you can ' t change your hostname and IP"        Echo "If You don't know your DNS Server Address, you can use the Param [-M testdomain] to get the right Server add Ress,eg:$0-m swu.edu.cn"Exit1} ((params=$#%2))if[[$#-GT -]]; Thenusage#elif[$params-eq 1]; Then# Usagefi#设置默认参数值domain="swu.edu.cn"the domain name of the #默认测试DNS Server address Basedir="/usr/local/ddns"# Basic working directory KeyFile="$basedir"/"' ls $basedir |grep '. key$ '"#公钥文件ttl= -# Ttlinterface="eth0"# External Online interface! hostname=`hostname' servername=`grep 'nameserver'/etc/resolv.conf |Head-N1|awk '{print $}'' #dns Server ipnewip=`ifconfig "$interface"|grep 'inet Addr'|awk '{print $}'|sed-E"s/addr\://"' #IP地址 # processing NetworkManager Management DNS Server, basically not used, generally after starting NetworkManager will automatically modify resolv.confif["$servername"==""]; Thenservername= ' Nslookup $domain |grepserver|awk '{print $}'`fi#获取用户输入参数, default parameters are used if not specified while[$#-GT0 ] Do         Case$1 inch-I.)Shift; interface=$1;Shift;; -D)Shift; basedir=$1;Shift;; -h)Shift;hostname=$1;Shift;; -T)Shift; ttl=$1;Shift;; -s)Shift; servername=$1;Shift;; -K)Shift; keyfile=$1;Shift;; -c)Shift; newip=$1;Shift;; -m)Shift;d omain=$1;Shift;; *) usage;; Esac Done#自动查找DNS和手动都找不到DNS则退出if["$servername"==""]; Then        Echo "Error:can not find the DNS server!"Exit1fi#检查IP合法性checkip=`Echo$newip |grep "^[0-9]"`if["$checkip"==""]; Then        Echo "$0:the interface can ' t connect the Internet ...."Exit1fi#检测basedir目录是否存在, does not exist then createsif! ([-D $basedir]); Then        mkdir-P $basedirfi#检测keyfile存在性if! ([-F $keyfile]); Then        Echo "Error: $keyfile does not exist!"Exit1fitmpfile= $basedir/tmp.txt# If the file does not exist, createif! ([-F $tmpfile]); Then        Touch$tmpfile #查看是否创建成功if! ([-F $tmpfile]); Then                Echo "Permission Denyed,can not touch $tmpfile in $basedir"Exit1        fifi#写入配置文件Echo "Server $servername">$tmpfileEcho "Update Delete $hostname A">>$tmpfileEcho "Update Add $hostname $ttl A $newip">>$tmpfileEcho "Send">>$tmpfile # Update Nsupdate-K $keyfile-V $tmpfile

　　

The test is as follows:

　　

　　

　　

This efficiency has indeed improved a lot.

Linux setup DDNS server automatic Update script