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Launch and Access Amazon AWS EC2 Instances

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Amazon Web Services (AWS) is a secure cloud services platform, offering compute power, database storage, content delivery and other functionality to help businesses scale and grow. Millions of users are currently leveraging AWS cloud products and solutions to build sophisticated applications with increased flexibility, scalability and reliability. In this post, I recorded all steps regarding how to launch a free…

Creat AWS Diagrams Online

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I was looking for some online tools to create impressive AWS diagram for my learning process. Most of online diagram websites provide certain free usages. Here are some websites I found useful to me.   1. AWS 3D Diagram from Cloudcraft.co It is quite impressive when I started to make my first diagram. Limit grid size is a big pain…

Building a 3S (Scalable, Stable and Secure) AWS Test Environment – Part 1

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Gartner’s Magic Quadrant for Cloud Infrastructure as a Service, Worldwide June 2017.  According to Gartner, Amazon Web Services (AWS) has became as the undisputed leading cloud provider in the world. AWS is rated “the most mature, enterprise-ready provider, with the deepest capabilities for governing a large number of users and resources.” Gartner says it can satisfy the cool kids who want…

Cisco Router IKEv2 IPSec VPN Configuration

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What is Differences between IKEv1 and IKE v2? 1. Different negotiation processes − IKEv1 IKEv1 SA negotiation consists of two phases. IKEv1 phase 1 negotiation aims to establish the IKE SA. This process supports the main mode and aggressive mode. Main mode uses six ISAKMP messages to establish the IKE SA, but aggressive mode uses only three. Therefore, aggressive mode…

Juniper Space Security Director Policy Hit Counts Not Updated Automatically

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Issue Symptons: Normally, each firewall rule on the SRX auto-updates a snmp counter for hit-count, regardless of whether ‘count’ is configured or not.  Juniper Space Security Director periodically polls these OIDs and updates the hit-count.    In Junper Space 16.1 R1, the issue found is unable to view policy hit counts from Juniper Space Security Director, but SRX itself is…

Troubleshooting Cisco IPSec Site to Site VPN – “QM Rejected”

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There was a VPN issue to troubleshoot recently. It was between Juniper SRX and Cisco Router. It seems straightforward but it took quite a long time to troubleshoot because of communication. All steps listed here for my future reference. Some other related posts: Troubleshooting Cisco IPSec Site to Site VPN – “reason: Unknown delete reason!” after Phase 1 Completed Troubleshooting…

Blogger Tips and Tricks

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Here are some collections for bloggers from my pas blogger experience: 1. Adjust Right Sidebar margin width Sometimes, the space between main body posts section and right side bar is too wide. You may want to change it from 40px to 10 px. Here is the code I found from here: #sidebar-right-1{position: relative;left: 40px !important;} Add the code to Blogger Them Designer –…