Experiencing the following error when you attempt to take a snapshot on a specific VM? The operation is not allowed in the current state. The current article apply to a situation where this message is showed up, but the VM is powered-off. If your situation is otherwise, it may also apply. If there is no… Read More »
Outgoing e-mail failing with the following error on your cPanel mail server? 503 Valid RCPT command must precede DATA This can be caused by various factors, such as permission issues, out of space or inode limit reached. To investigate this issue, a good start would be having a look at the logs to find out… Read More »
Encountering the following error with Hyper-V? The requested operation could not be completed due to a file system limitation. This is most likely due to the fact you are trying to perform an operation on an unsupported filesystem. Hyper-V only support NTFS, make sure your drive is formatted accordingly.
This article will explain how to add a security zone with a dedicated VLan, DHCP scope and DNS proxy rule. For the purpose of this example, we will add a guest zone with the following parameters : VLan ID : 40 Subnet : 10.10.40.0/24 Gateway IP (layer 3 interface) : 10.10.40.1 DHCP Scope : 10.10.40.128/25… Read More »
Beside the iCloud service, iTunes is the way to go when you need to backup your Apple mobile devices such as iPhone and iPad. If you want to secure the backups taken by iTunes on your computer file system, this article will show you where it is stored on your macOS computer file system. Before… Read More »
Heading toward OpenNMS and Grafana for your monitoring and visualization needs? Way to go! (or Oh Yeah! like Duffman would say). First of all, I suppose since you’ve end up reading that post, that you have a successful installation of OpenNMS, Grafana and OpenNMS Help plugin. Adding a data source in Grafana in your OpenNMS… Read More »
If you have an Intel card and the necessary “Advanced Network Services (ANS)”, that is bundled with the Intel driver, you have the capability to manage VLans for your network interface with PowerShell. 1. Use the “ipconfig” command to find out the name of your adapter. Example : PS C:\WINDOWS\system32> ipconfig Windows IP Configuration Ethernet… Read More »
Here is how to configure DHCP relay on the QFX platform. 1. Define a DHCP server group with DHCP servers IP address(es) : set forwarding-options dhcp-relay server-group <server-group-name> <ip.address> Example : If you want to name the group as “PRD-dhcpSrv” and the IP of the server is 10.1.1.10 : set forwarding-options dhcp-relay server-group PRD-dhcpSrv 10.1.1.10… Read More »
Experiencing the following behavior with RHEL/CentOS 7.2 and NFS? NFS folder mount hang and the following output can be observed in logs and dmesg : NFS: state manager: lease expired failed on NFSv4 server 0.0.0.0 with error 10082 NFS: nfs4_discover_server_trunking unhandled error -512. Exiting with error EIO nfsd: last server has exited, flushing export cache… Read More »
In some rare occasion, you may end up with an orphaned VM in your vCenter inventory where no “remove” option is available from the option menu. Beside doing the removal using the CLI, there is still a way that worked most of the time for me. 1. Browse to “VMs and Templates inventory” inside the… Read More »