In today’s rapidly evolving digital landscape, protecting enterprise networks from increasingly sophisticated threats is crucial. A Cloud Security Web Gateway (Cloud SWG) acts as a robust solution, providing comprehensive security between users and the...
Introduction In today’s hyper-connected, cloud-driven world, traditional network architectures are no longer sufficient. With users working remotely, applications moving to the cloud, and cyber threats growing more complex, organizations need a new approach to...
This guide will walk you through the process of installing pfSense as a virtual machine on VMware ESXi. The pfSense project is a free network firewall distribution, based on the FreeBSD operating system with...
I need to install a wildcard certificate on Cisco PI for testing purpose, the following is the installation process. Environment Ubuntu 19.10 OpenSSL 1.1.1c Prime Infrastructure 3.10 Google Chrome 109.0.5414.120/Microsoft Edge 109.0.1518.70 FTP Server...
Someone asked me an interesting question, whether lightweight APs can join a Catalyst 9800 Wireless LAN Controller over a mesh network. My first thought was to implement it with Ethernet Bridging, and after testing...
I recently installed Splunk 8.2.4 because older version of Splunk was affected by the Log4j vulnerability, the following is the installation process. Installation Download and install the dpkg package. Initial configuration Entering the following...
The vulnerability of the Apache Log4j Library affects a very wide range, and the Cisco Identity Services Engine also affected. In this article I will discuss how to install Log4j patch to ISE. I...
If you need to validate your QoS configuration, this article may be helpful to you. I will discuss here how to change the DSCP value in the simplest way, including Linux and Windows systems....
Recently I was troubleshooting a wireless problem. The symptom is that the client cannot connect to a certain radio interface. However, in the test, because the client often selects other radio interfaces, the symptom...
We may need to capture vlan tags during troubleshooting, the configuration method is summarized as follows. Switch side configuration Cisco switches can use Switched Port Analyzer (SPAN) to capture packets, and we need to...
Option 43 can be used to discover WLC or convert EWC/ME to CAPWAP. This is a really useful feature, and I often need to use it in my tests. But its format conversion is...
Ports Connect the GigabitEthernet port to the upstream switch. Configure the wireless interface, the configuration is the same as the GigabitEthernet port. We may also need to configure the default route. After configuration, it...
Playwright is a browser automation tool released by the Microsoft team. Another popular tool similar to it is Selenium. Playwright has a significant advantage in recording and generating code. Installation Generate code We can...
Installing Quasar with npm. Create Quasar project folder. Start the Quasar Project. We may encounter the following errors. Use the -p parameter to change to other port.
I have multiple remote Ubuntu servers for running Python scripts. Before that, I had two choices, using SSH to login remotely for development, or copying file to the remote servers after local development. But...
SecureCRT is powerful, high-usability terminal emulator. I found some useful tips & tricks when using SecureCRT, which are summarized below. Copy & Paste When using terminal window, we often need to copy & paste...
Crontab is a command used to execute tasks regularly in Linux/Unix operating systems. It is very suitable for repetitive tasks. I am using Ubuntu 20.04 LTS, but the crontab commands in most linux distributions...
vsFTPd is a lightweight FTP server. After installation, we can use filezilla to upload or download files. Installation Configuration We may encounter “550 permission denied” error, which impossible to upload files. Then restart vsftpd...
Product overview Official explanation The Cisco® Embedded Wireless Controller (EWC) on Catalyst® Access Points is a software-based controller integrated into Cisco Catalyst 9100 Access Points. It is a simplified, low-cost, feature-rich Wi-Fi architecture with...
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