Amazon VPC 的 VPN 推出新功能了：「EC2 VPC VPN Update – NAT Traversal, Additional Encryption Options, and More」。
其中「Reusable CGW IP Addresses」這個功能讓大家等超久的：(CGW 是 Customer Gateway，通常是放在自己的機房裡跟 Amazon VPC 設 site-to-site VPN 對接)
You no longer need to specify a unique IP address for each customer gateway connection that you create. Instead, you can now reuse an existing IP address. Many VPC users have been asking for this feature and I expect it to be well-used.
之前得弄一堆 IP address 來接來接去，現在總算是改善了...