EC2 上的 Security Group 對於 pfSense 的主機得全開，因為 pfSense 會丟出不屬於他自己 IP address 的封包，也會接收不屬於自己 IP address 的封包 (透過上面提到的 routing)，這些都還是會經過 Security Group 的檢查，而 Security Group 能設定的數量有限，基本上應該會全開...
另外 AWS 的 VPC Traffic Mirroring 比以前 switch 的 port mirror 更彈性，可以把整個網路當來源，或是指定特定的 ENI 當來源：
Mirror Source – An AWS network resource that exists within a particular VPC, and that can be used as the source of traffic. VPC Traffic Mirroring supports the use of Elastic Network Interfaces (ENIs) as mirror sources.
然後除了可以打到 ENI 上，也可以打到 NLB 上：
Mirror Target – An ENI or Network Load Balancer that serves as a destination for the mirrored traffic. The target can be in the same AWS account as the Mirror Source, or in a different account for implementation of the central-VPC model that I mentioned above.
不免俗的，可以過濾封包：
Mirror Filter – A specification of the inbound or outbound (with respect to the source) traffic that is to be captured (accepted) or skipped (rejected). The filter can specify a protocol, ranges for the source and destination ports, and CIDR blocks for the source and destination. Rules are numbered, and processed in order within the scope of a particular Mirror Session.
Traffic Mirror Session – A connection between a mirror source and target that makes use of a filter. Sessions are numbered, evaluated in order, and the first match (accept or reject) is used to determine the fate of the packet. A given packet is sent to at most one target.
而且這一次公佈就幾乎開放所有區域了，費用看起來也不太貴：
VPC Traffic Mirroring is available now and you can start using it today in all commercial AWS Regions except Asia Pacific (Sydney), China (Beijing), and China (Ningxia). Support for those regions will be added soon. You pay an hourly fee (starting at $0.015 per hour) for each mirror source; see the VPC Pricing page for more info.
Amazon CloudFront announces the addition of an eighth Edge location in Tokyo, Japan. The addition of another Edge location continues to expand CloudFront's capacity in the region, allowing us to serve increased volumes of web traffic.
This is an animation of traffic flows simulated on 30 different kinds of four-way junctions, from two roads intersecting with no traffic lights or signs to complex stacked interchanges that feature very few interactions between individual cars. It was recorded in a game called Cities: Skylines, a more realistic take on SimCity.
Early this morning (UTC) our systems detected a suspicious event where many prefixes for high profile destinations were being announced by an unused Russian Autonomous System.
可以看到相當多知名的網段都被導走：
Starting at 04:43 (UTC) 80 prefixes normally announced by organizations such Google, Apple, Facebook, Microsoft, Twitch, NTT Communications and Riot Games were now detected in the global BGP routing tables with an Origin AS of 39523 (DV-LINK-AS), out of Russia.
