Namesilo 的 DDNS

家里的公网 IP 地址有时会变化，这使得我的某些依赖域名的服务（网站， VPN ， rsync 备份等）随之陷入瘫痪。原来我是在我的路由器上用免费的 DDNS 功能，但这种免费服务一般不能使用自己的域名，又或者必须将域名迁移到 DDNS 的服务商那里。总之很是不爽。

在 V2EX 看到很多人推荐，我把域名也转到了 Namesilo 。（拜拜了，狗带！） Namesilo 不仅价格合理，而且我发现竟然还有 API 接口支持！惊喜之后上网搜索有关 Namesilo 的 DDNS 方案，不料大失所望！只发现有在 WINDOWS 的 POWERSHELL 下的一个方案。

好吧，那就自己动手解决吧。

#!/bin/bash

##Domain name:
DOMAIN="mydomain.tld"

##Host name. 
##If you want manage host "myhost.mydomain.tld", then
HOST="myhost"

##APIKEY obtained from Namesilo:
APIKEY="c40031261ee449037a4b4"

##Saved history pubic IP from last check
IP_FILE="/var/log/MyPubIP"

##Get the current public IP 
CUR_IP=$(curl -s http://icanhazip.com)

##Exit if curl failed
if [ $? -ne 0 ]; then
   exit 1
fi

##Check file for previous IP address
if [ -f $IP_FILE ]; then
  KNOWN_IP=$(cat $IP_FILE)
else
  KNOWN_IP=
fi

##See if the IP has changed
if [ "$CUR_IP" != "$KNOWN_IP" ]; then
  echo $CUR_IP > $IP_FILE
  logger -t IP.Check -- Public IP changed to $CUR_IP

  ##Update DNS record in Namesilo:
  curl -s "https://www.namesilo.com/api/dnsListRecords?version=1&type=xml&key=$APIKEY&domain=$DOMAIN" > $DOMAIN.xml 
  RECORD_ID=`xmllint --xpath "//namesilo/reply/resource_record/record_id[../host/text() = '$HOST.$DOMAIN' ]" $DOMAIN.xml | grep -oP '(?<=<record_id>).*?(?=</record_id>)'`
  curl -s "https://www.namesilo.com/api/dnsUpdateRecord?version=1&type=xml&key=$APIKEY&domain=$DOMAIN&rrid=$RECORD_ID&rrhost=$HOST&rrvalue=$CUR_IP&rrttl=7207"
else
  logger -t IP.Check -- NO IP change
fi

exit 0

详情： http://blog.pztop.com/2016/04/25/Namesilo-with-DDNS/

lwd2136

2016-11-30 09:05:31 +08:00

@dynaguy 隐去了些特定信息
+ DOMAIN=abc.com
+ HOST=edgeos
+ APIKEY=123
+ IP_FILE=/var/log/MyPubIP
+ RESPONSE=/tmp/namesilo_response.xml
++ curl -s http://icanhazip.com
+ CUR_IP=223.5.5.5
+ '[' 0 -ne 0 ']'
+ '[' -f /var/log/MyPubIP ']'
+ KNOWN_IP=
+ '[' 223.5.5.5 '!=' '' ']'
+ echo 223.5.5.5
+ logger -t IP.Check -- Public IP changed to 223.5.5.5
+ curl -s 'https://www.namesilo.com/api/dnsListRecords?version=1&type=xml&key=a123&domain=abc.com'
++ xmllint --xpath '//namesilo/reply/resource_record/record_id[../host/text() = '\''edgeos.abc.com'\'' ]' abc.com.xml
++ grep -o '(?<=<record_id>).*?(?=</record_id>)'
+ RECORD_ID=
+ curl -s 'https://www.namesilo.com/api/dnsUpdateRecord?version=""
++ xmllint --xpath '//namesilo/reply/code/text()' /tmp/namesilo_response.xml
+ RESPONSE_CODE=108
+ case $RESPONSE_CODE in
+ logger -t IP.Check -- DDNS update 'failed!'
+ exit 0