HP / Aruba Procurve 2530/2500 Default Configurations

Back-up of an existing config If you are performing a backup a config from another switch, two ways of downloading the configuration is through GUI and CLI (via TFTP) via GUI: (System -> Updates/Download -> Configuration File (Highlight config name and click Download) via CLI. (you need to set up a TFTP server on a … Continue reading HP / Aruba Procurve 2530/2500 Default Configurations

Cisco: All about errdisable (and how to enable ports disabled by it)

Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch and is supported on most Catalyst switches running the Cisco IOS software. The Errdisable error disable feature was designed to inform the administrator when there is a port problem or error.  The reasons a catalyst switch can go into Errdisable mode and shutdown … Continue reading Cisco: All about errdisable (and how to enable ports disabled by it)

Understanding SPAN,RSPAN,and ERSPAN

Introduction: Switch port Analyzer (SPAN) is an efficient, high performance traffic monitoring system. It duplicated network traffic to one or more monitor interfaces as it transverse the switch. SPAN is used for troubleshooting connectivity issues and calculating network utilization and performance, among many others. There are three types of SPANs supported on Cisco products, which … Continue reading Understanding SPAN,RSPAN,and ERSPAN

Fortigate: Web Filtering is “Unreachable”

Came across this problem that I am unable to use "Web  Filtering" feature on my Fortigate 200B on Firmware 5.2.11 Web Filter error shows the following error before you can create a profile. Licensing information on Fortigate Portal shows I am licensed to use Web Filtering, but on my local firewall error shows "Unreachable" Things … Continue reading Fortigate: Web Filtering is “Unreachable”

UniFi: Run the Controller as a Windows service

Here is a useful guide from Ubiquiti with regards to running the Controller service as a Windows Service. This is essential when running a centralized controller for your APs and to make sure you contoller would run automatically after a restart rather than enabling it to run maunally.   Originally posted at: https://help.ubnt.com/hc/en-us/articles/205144550-UniFi-Run-the-Controller-as-a-Windows-service Readers will learn … Continue reading UniFi: Run the Controller as a Windows service

Fortigate: How to allow (or deny) wildcard FQDN (Domains) in Policy

The answer is No. It won't work. As we all know, Wildcard FQDN firewall address should not be used in a firewall policy (Full details here). Simple explanation is that because the Firewall wont be able to query on to *.example.com when it tests the policy. There, however is a workaround. Use WEB-POLICY. In my … Continue reading Fortigate: How to allow (or deny) wildcard FQDN (Domains) in Policy