Tumblr域名绑定IP变更

没看太懂. 第一种适用于子域名, 第二种用于二级域名

http://www.tumblr.com/docs/en/custom_domains

If you are using a subdomain that has three or more levels, like www.mywebsite.com or blog.mywebsite.com, follow the registrar's instructions to point the CNAME record for the subdomain to domains.tumblr.com.

OR

If you are using a domain that has only two levels, like mywebsite.com, follow the registrar's instructions to point the domain's A-record (IP address) to 66.6.44.4.

做a记录到没有被国内过滤掉的ip就行了。