放blog的DigitalOcean VPS的IP被墙了。虽然没有直接换IP的功能，但也并不算麻烦。简单的说就是创建一个当前droplet的snapshot，用snapshot新建一个droplet，然后把当前被墙掉的droplet删掉就可以了。这期间不会产生什么额外的费用。

如果不是用snapshot创建droplet的那个页面操作比较奇怪以至于我弄错好几次的话，全程应该用不了10分钟。另外snapshot默认只存放在创建的数据中心上，要换地方的话得到设置里面去distribute一下。用snapshot创建droplet的功能应该是搞成下面这样。

以下是我询问DigitalOcean客服的时候他们给的回信：

Hey there,

Thanks for reaching out to us about changing your IP address!

My name is Mike, a Platform Support Specialist at DigitalOcean :)

Unfortunately this is not a feature we currently support directly from the control panel but this is a feature we are working on and planning on implementing in the future. In the meantime I do have a workaround for your question.

In order to change the IP address of a droplet you would need to power it down and create a snapshot first. Once the snapshot is created, you then need to create a new Droplet based on that snapshot. The important part is creating this new droplet before destroying the old one so a different IP address is assigned to it. Once the new Droplet is created it will have a different IP address. Once you are satisfied with the new Droplet you can then destroy the old one if necessary.

I hope this has been helpful! Please let us know if you need anything else.

Regards,
Mike
Platform Support Specialist
DigitalOcean Support

After upgrading from iPhone 6 to iPhone 6S, both on iOS 9.0.2, I noticed my Mac could only receive iMessage but not SMS. When I checked the settings on phone, the “Text Message Forwarding” option wasn’t showing up in the Messages settings. Later on I tried to toggle the iMessage switch to see if it could fix the issue, but it only made things worse.. The iMessage stuck at “Waiting for Activation” and sometimes threw an error message saying “an error occurred when activating iMessage”. There were a few key symptoms:

• iMessage didn’t work for the phone number, but worked for the email registered for iCloud.
• When toggling iMessage switch, it showed the “waiting for activation” message, or the “an error occurred when activating iMessage” message, or asked me to re-login with my Apple ID.
• In the “Settings => Phone” panel, “My Number” showed as “Unknown”.
• FaceTime was working at first but later on had the same issue with iMessage.

I tried all methods listed on various articles like these (1, 2, 3). Eventually it got solved by completely restoring the phone to factory settings with iTunes and set up as a new phone, not restored from a backup. Note that I tried to reset then restore with a data backup, which didn’t solve the issue; I also tried to reset just by the phone, not by iTunes, which didn’t solve the issue either. I guess both ways didn’t wipe things “cleanly” enough and left some bad data behind.

I’ve heard various bugs and complaints about iMessage. This is the first time I got hit by an actual tough one. It was quite unpleasant because I need to reconfigure the whole phone and all the Apps instead of just restoring from a backup. iPhone 6S is sleek and lightning fast so it’s a good proof that Apple is playing its strength of integrating hardware and software well. But the software quality from Apple seems going downwards when more complex functions are thrown in this OS.

在美国住下的人常常会在各种优惠条件的吸引下申请不少信用卡。虽然信用卡的条款可以在申请之前就了解得很清楚，但银行的IT水平例如网站和App做得怎么样就几乎只能拿到卡用起来才能了解了。以下列举一下我用过的几家的状况：

• 很好的：American Express，Chase
  基本上很好的意思就是网站和App都比较现代，更新比较勤快，功能都比较好用。该有的通知都有。看Touch ID这样的功能的支持速度就基本可以看出来。
• 中等的：Bank of America，Discover，Citi
  中等的意思就是网站和App该有的功能也都有，但可能得找找才能找到。更新都比较迟缓，iOS 7出来好久还停留在iOS 6风格什么的。再就是有些功能往往会掉链子，比如BoA有一次给我换了个卡号然后Auto Payment就莫名其妙的消失了，Discover则是多张卡不能放在一个账户下面必须注册多个账户。Citi也有类似的问题，酒店联名卡和Citi自己的卡不能放在一个online账户下面。总的来说就是平时用着还凑合，但偶尔会有比较恼人的问题。
• 很烂的：Barclays US
  这基本上是个异类，去年Barclays有张返现率2.2%的卡还不错于是我申请了。然后我才发现这家的IT水平很奇葩。比如消费通知往往会延迟一天以上才收到，再比如手动还款会很不方便因为出了账单以后系统里面会有一个自动生成的还款日还款且不能取消，还有Apple Pay虽然支持但居然需要打电话跟客服讲话才能关联上其他所有家都是一个短信验证码的事情。。总之属于用了一年就再也不想用的那种。