Have you ever seen Linux booting from an open disk?


Sorry about the quality… I think I recorded this back in 2012 with an old phone… but… fun isn’t it?

The Amazon Distributed Computing Manifesto


Back in 1998, a group of senior engineers at Amazon wrote the Distributed Computing Manifesto, an internal document that would go on to influence the next two decades of system and architecture design at Amazon.

Source (Werner Vogels): https://www.allthingsdistributed.com/2022/11/amazon-1998-distributed-computing-manifesto.html

List AWS Security Groups open to 0.0.0.0/0


We all now that opening security groups to the world is a bad practice, right? Maybe we can audit these running some queries like the following:

Inbound:

$ aws ec2 –region us-west-2 describe-security-groups –filter Name=ip-permission.cidr,Values=’0.0.0.0/0′ –query “SecurityGroups[*].{Name:GroupName,ID:GroupId}” –output table

| DescribeSecurityGroups |
+-----------------------+-------------------+
| ID | Name |
+-----------------------+-------------------+
| sg-0b977c7003c7b280 | launch-wizard-2 |
+-----------------------+-------------------+

Outbound:

$ aws ec2 –region us-west-2 describe-security-groups –filter Name=egress.ip-permission.cidr,Values=’0.0.0.0/0′ –query “SecurityGroups[*].{Name:GroupName,ID:GroupId}” –output table

| DescribeSecurityGroups |
+-----------------------+-------------------------------------------------+
| ID | Name |
+-----------------------+-------------------------------------------------+
| sg-61de04 | vivXXXX_XX_US_West |
| sg-9eefe3 | CentOS 6  |
| sg-9479a0 | default |
| sg-e6b0a4 | ElasticMapReduce-master |
| sg-077c79703c7b280 | launch-wizard-2 |
| sg-b24375 | default |
+-----------------------+-------------------------------------------------+