If you want your SRX firewall to handle DNS requests on your network, you need to configure the forwarders to make this possible, in addition to a few other parameters. First, make sure you have no local forwarders set on the device itself as it cannot be used along with the dns-proxy service – if… Read More »
Well this is embarrassing, my 11 years old workstation crashed while I had several VMware Workstation guests running (thanks for all those years of flawless runtime!). All my VMs had auto-snapshots enabled, meaning that VMware Workstation was automatically taking snapshots of my development VMs every day. Guests VMs with snapshot does not react so well… Read More »
Experiencing the following issue with Nmap on Windows? $ nmap -P0 -sS -T5 0.0.0.0 Starting Nmap 7.70 ( https://nmap.org ) at 2019-06-04 03:14 ric dnet: Failed to open device eth0 QUITTING! It appears that some version of Npcap (or WinPcap) is causing issues. Updating Npcap to version 0.995 solve this issue. If you are running… Read More »
Having the following message while trying to setup a DNS cluster with cPanel? Unknown API Error when attempting to contact the remote system This error is usually caused by firewall blocked port (most likely tcp-2087) and/or DNS record pointing to the wrong IP. To find out, have a look at the following log file :… Read More »
Here is the command how to show the available system memory on Windows with PowerShell command : (systeminfo | Select-String ‘Total Physical Memory:’).ToString().Split(‘:’)[1].Trim() Example : PS C:\Users\user> (systeminfo | Select-String ‘Total Physical Memory:’).ToString().Split(‘:’)[1].Trim() 32,767 MB
Here are some useful commands to manage the Exim mail server queue. Show the mail queue content : exim -bp Show the amount of mail in the queue : exim -bpc Delete a specific message in the queue, with the help of the first command in this example (exim -bp) to get the message ID… Read More »
Having this error message when you login your Windows session : An error occurred while reconnecting X: to \\server-name\x$ Microsoft Windows Network: Multiple connections to a server or shared resource by the same user, are not allowed. Disconnect all previous connections to the server or shared resource and try again. This connection has not been… Read More »
Encountering the following error message trying to increase space on a vDisk for a guest machine on VMware ESXi? Failed to reconfigure virtual machine VM_Name. Invalid operation for device ‘X’. This is most likely because you have one or more snapshot(s) present. You need first to delete/consolidate all snapshot before increasing the size of a… Read More »
Here is a procedure how to export the saved address book contacts from Roundcube webmail directly from the MySQL database to a CSV file (please note that Roundcube natively support exporting contacts from the Webmail itself to CSV – this method is only in case you want to pull out old contacts from a database).… Read More »
I recently had to provision a RedHat Enterprise Linux 6 system for a customer that owned a production system that I have provisioned four years ago. The new system requirement was to match the same package version as the old system (that they left un-updated since the deployment – fortunately for them it was an… Read More »