Python DDNS client for Aliyun(http://www.guanxigo.com/netcn-ddns-client/)

1. copy all files to somewhere, e,g: /opt/aliyun-ddns-client
2. copy ddns.conf.example to /etc/ddns.conf
3. create a cronjob which execute "python ddns.py" periodly, e,g:
4. make sure /etc/ddns.conf can be accessed by user */5 * * * * cd /opt/aliyun-ddns-client && /usr/bin/python ddns.py

Required options need to be set in /etc/ddns.conf:

• access_id
• access_key
• domain
• sub_domain
• type

Optional options:

• id
• debug
• value

[DEFAULT]
# access id obtains from aliyun
access_id=
# access key obtains from aliyun
access_key=
# it is not used at this moment, you can just ignore it
interval=600
# turn on debug mode or not
debug=true

[1]
# domain name, like google.com
domain=
# subdomain name, like www, blog, bbs
sub_domain=
# record id which get from DNS service provider
id=
# it can be IP address, alias to another hostname...
value=
# resolve type, 'A', 'MX'...
type=

1. Create a subdomain on net.cn manually, e,g: blog
2. You can leave any IP address on net.cn for this subdomain, like 192.168.0.120
3. Make sure all mandantory options inputted correctly in /etc/ddns.conf
4. Make sure /etc/ddns.conf can be readable and writable for the user who setup cron job

1. When Aliyun ddns client rums first time, it will fetch subdomain record's id and save to local /etc/ddns.conf
2. Then it will compare current public ip with local value in /etc/ddns.conf, if it doesn't match, it will sync the current public ip to net.cn server
3. If sync operation done successfully, the new updated value(IP) in server side will be saved in local /etc/ddns.conf too