JunOS : Interface irb.1 must be configured under interfaces

While adding a new security zone on your SRX firewall, you may encountered the following error while committing your changes: [edit security zones security-zone VLAN1] ‘interfaces irb.1’ Interface irb.1 must be configured under interfaces error: configuration check-out failed This is a common mistake where the irb interface configuration was forgotten. For those unfamiliar with the… Read More »

Linux : How to clear stuck AutoSSL queue in cPanel

cPanel AutoSSL feature is great, but sometime can run into issues. Once in a while, you may have some certificate requests pending forever without any particular reason. This usually can be fixed by clearing the queue and force AutoSSL to run for the stuck domain again. 1. Move the AutoSSL database file under a different… Read More »

VMware : VCSA upgrade vix error codes = (1, 4294967286)

You may have experienced the following behavior while trying to upgrade your vCenter Server Appliance (VCSA) to 6.7.x – after submitting the IP and credentials information of the current vCenter and host, the wizard end up with error without any details. However, after downloading the log (there is a link within the red error bubble… Read More »

PC : Secure Boot missing from BIOS option on Gigabyte Z390 Designare

If you have a Gigabyte Z390 Designare motherboard, you might be wondering how to enable Secure Boot in order to meet the TPM2 Windows 11 requirement. Browsed every section of the BIOS and didn’t found it? Most likely you have “CSM Support” option enabled. (Compatibility Support Module (CSM) is a feature of the UEFI firmware… Read More »

Category: PC

IOS : Factory reset a Cisco Catalyst switch

In this article we will cover the procedure to reset a Cisco Catalyst to factory default settings. This will wipe out the current configuration written in flash and also the VLan database file as well. 1. Connect the switch serial console port to a computer and open up a terminal so you can see the… Read More »

Linux : OSSEC WebUI not showing information after PHP upgrade

You may have noticed that the OSSEC Web Interface stopped working (as of today on a new installation) or after updating PHP on your server. Looking at the logs, you most likely found a similar entry: PHP Fatal error: Uncaught Error: Call to undefined function split() in /var/www/html/ossec/lib/os_lib_agent.php:111\nStack trace:\n#0 /var/www/html/ossec/site/main.php(33): os_getagents(Array)\n#1 /var/www/html/ossec/index.php(126): include(‘/var/www/html/o…’)\n#2 {main}\n thrown… Read More »

Linux : cPanel outgoing email return “this server is not permitted to relay through this server without authentication”

Recently, without any change, I noticed that some cPanel servers stop sending email and return the following error: 550-Please turn on SMTP Authentication in your mail client. 550-hostname.domain.tld []:00000 is not permitted to relay 550 through this server without authentication. What is really puzzling in that case is that this message showed up even though… Read More »