A computer that had 30 seconds ahead of the domain controller got me to do this sanity check to see if the time is synchronized across the whole network. Why? Because having time off all over the place will cause all sorts of weird issues. It’s just that important. Here is a checklist of things you need to know when […]
I have a Group Policy setting in place that forces all workstations in the same OU checks and installs any available updates from a local WSUS automatically at 3:00 am every single day. It has worked beautifully until recently I started upgrading them gradually to Windows 10. The ones graduated from Windows 7 to Windows 10 don’t reboot themselves anymore […]
In a webnar that details how MegaCortex, the most recent Ransomware, attacks the network, the presenter from Sophos briefly introduced how Ransomware evolved over the years, way back from 1989 when an AIDS trojan was spread by 20K floppy disks via postal office to most recent years attacks including WannaCry in 2017 and MegaCortex in 2019. Guess how many type […]
Back to the old days when everything goes through the classic SMTP, nothing gets protected. Those were the good days for any man in the middle, picking up confidential information like free gift. Not anymore with the use of TLS, StartTLS, or even better S/MIME which is suitable for your most sensitive information. Every email sent through TLS is encrypted […]
A fellow IT Redditor, /u/shalafi71, created quite a security training slideshow and generously shared his PowerPoint on /r/sysadmin, who also adds: Take this as a skeleton and flesh it out on your own. Take an hour or two and research the things I talk about. Tailor this to your own environment and users. Make it relevant to your people. Include corporate stories, […]
With the end of life is approaching fast for Windows 7 systems, I racked up my nerve and set up a Microsoft Deployment Toolkit (MDT) system lately to replace my ages-old ImageX imaging system for Windows 10 deployment, either new installations or upgrades from old Operating Systems like Windows 7 or Windows 8.1. Setting it up wasn’t too bad, especially […]
I had a need to manipulate some text files to get the clean data the other day and found it’s extremely easy to deal with text files with PowerShell. To open a text file and get the content of it, Get-Content path\filename.txt But I can use ForEach cycle to read each line the same time. foreach ($eachline in Get-Content path\filename.txt) […]
SPF, DKIM, and DMARC are different methods to authenticate your email to serve one dedicated purpose, detecting forged sender address in emails used in phishing or spam. SPF, Sender Policy Framework, allows the receiver to check that an email claiming from a specific domain comes from an IP address authorized by that domain’s admin. A typical SPF record is a […]