It is possible with Config Security Firewall (CSF) to open an inbound port from a specific source IP address. This is defined outside of the global configuration (csf.conf), within a dedicated config file. 1. Open the following file with your favorite text editor : /etc/csf/csf.allow 2. Follow this syntax to open a specific port for… Read More »
If you are running a Virtual Chassis on EX, QFX or MX platform and end up in a situation where one of the vc-port show up on one unit, and down on the other, this lecture is for you! Let’s do a quick recap on the behavior : 1. Interface set as vc-port (SFP+ or… Read More »
Having the following error when trying to add a new hypervisor to an existing cluster in VMware vCenter? A general system error occurred: Time out waiting on vpxa to start This is most likely happening with the ESXi version is greater than the ones supported by your currently running vCenter. Have a look at the… Read More »
Since Windows 10 build 1803 from April 2018, the XPS Viewer is no longer included by default in that build of the operating system and has to be installed manually. Usually this is done by browsing to the applications and feature pane but sometimes cannot be found and installed this way. The quickest and most… Read More »
Under some rare circumstances, you may require to change the default route metric. The first way of doing should be through the “ifcfg-ethX” configuration file by adding the “METRIC=” statement. However it has been found to be inefficient for me and had to apply it using “ip route” as followed : ip route del default… Read More »
Encountering the following error in the logs of your Juniper device? /kernel: Buffer management parity error detected in mpfe1, value 0x4001, re-init the PFE /kernel: Buffer management parity error detected in mpfe1, value 0, re-init the PFE This is most likely pointing toward defective hardware, more specifically memory issue. If this message showed only once,… Read More »
If your Windows 10 system suddenly stopped booting and show the following error message : VOLMGRX INTERNAL ERROR It most likely mean that your software RAID volume has failed. It may indicate a hardware underlying issue, such as a failed drive or the mirror just broke and is no longer in sync. To find out,… Read More »
Experiencing the following error while importing Guest VM template from single OVA file? Importing an OVA file with several disks fails with the error: Unable to access file: x:\vdisk.vmdk. End of OVA file reached while looking for: vdisk.vmdk I have encountered the following error trying to export a template I made, selecting a single OVA… Read More »
If you’ve noticed the following error message while starting CSF Firewall, it means that you are missing Perl modules on your system in order to fully take advantage of the capabilities of CSF. *WARNING* URLGET set to use LWP but perl module is not installed, reverting to HTTP::Tiny In order to install the missing Perl… Read More »
Encountered the following error during the Seafile installation process? Error: Failed to init ccnet database: Specified key was too long; max key length is 767 bytes Something went wrong while the installation script attempted to deploy the database. Normally, InnoDB has a limitation of 767 bytes and 1000 bytes for MyISAM. Creating the database with… Read More »