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…
Gartner Magic Quadrant for Data Center Infrastructure Management (DCIM) (2016, 2015,2014)
Data center infrastructure management (DCIM) tools monitor, measure, manage and/or control data center resources and energy consumption of both IT-related equipment (such as servers, storage and network switches) and facilities…
Cisco Wireless LAN Controller Redundancy Solutions: High Availability
There are two options for Cisco Wireless Controller redundancy solutions, either Backup Controllers or High Availability, depending on the firmware version of WLC’s, failover time requirement, and budget. Using Backup…
Cisco Wireless Controller 5508 Configuration Step by Step – Part 1 (CLI and GUI Access, Upgrade)
As the industry’s most deployed controller, the Cisco 5500 Series Wireless Controller provides the highest performance, security, and scalability to support business communications today and in the future. Cisco 5500…
Using Artica Squid Open Source Project to Build Powerful and Safe but Simple to Use Proxy
Looking for a pre-installed GUI based Proxy for a while and found Artica recently. The feature is pretty attractive and GUI interface looks cool. What is Artica? “Artica Proxy is…
Configure Netflow on network devices for PRTG Netflow Monitoring
Netflow is a feature first introduced into Cisco routers and switches and then flow concept has been widely accepted by other network product vendors. Basically the network devices which support…
Check Point Firewall Memory Issue
During regular firewall health check , I found one Check Point firewall cluster has a abnormal virtual memory usage from System Counters – System History view. The cluster is 5600…
Avocent® ACS 8000 Advanced Console System Configuration
My company has used Avocent ACS (Advanced Console Server) to do network devices’ console management for many years already. I were using 4000, 5000 and 6000 serie, and now 8000…