Juniper SRX DB mode (Debug mode)
During our regular maintenance, after rebooted one SRX345, and found it stuck at db mode, which is debug mode. After a short and quick analysis, I found Juniper JunOS devices…
Cisco Catalyst 2960X and 2960S Stacking
Working on stacking two Cisco 2060X switches recently, and two 2960X Stack module and 0.5m stacking cables received today. Product name is C2960X-STACK= and description is Catalyst 2960-X FlexStack Plus…
WAMP and WordPress Install on AWS Free Tier Windows 2012 R2
AWS provides a 750 hours free tier on Windows machine. I am always wondering how to install wordpress on it to use this free tier instance . Here is all…
Launch and Access Amazon AWS EC2 Instances
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…
Creat AWS Diagrams Online
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…
Building a 3S (Scalable, Stable and Secure) AWS Test Environment – Part 1
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.…
Cisco Router IKEv2 IPSec VPN Configuration
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…
Juniper Space Security Director Policy Hit Counts Not Updated Automatically
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…
Troubleshooting Cisco IPSec Site to Site VPN – “QM Rejected”
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…
Cisco Wireless Controller 5508 Configuration – Tips and Tricks
All basic configuration has been created from following related posts. This post will focus on some other configuration or troubleshooting happened in real environment. Relate Posts: Cisco Wireless Controller 5508…
Gartner Magic Quadrant for Network Performance Monitoring and Diagnostics (2017, 2016, 2015, 2014 )
According to Gartner, Network performance monitoring and diagnostics (NPMD) enable network professionals to understand the impact of network behavior on application and infrastructure performance, and conversely, via network instrumentation. Other…