PrintNightmare: Print Spooler Remote Code Execution Vulnerability
Information about the PrintNightmare vulnerability affecting the Windows Print Spooler service, including mitigation options and available updates.
MKvLab Blog
Security Update for Exchange Server 2013–2019: Pwn2Own Vulnerabilities
Microsoft released critical security updates for on-premises Exchange Server 2013, 2016, and 2019 to address several remote code execution vulnerabilities.
Commands I Use on My Mac
A collection of macOS command-line commands for DNS lookups, network testing, certificates, serial consoles, packet captures, IP information, and speed tests.
PowerShell Command-Line
A collection of PowerShell commands for Active Directory, Group Policy, Hyper-V, and Exchange Online administration.
How to Set Up SPF, DKIM, and DMARC Records for Microsoft 365
Learn how to configure SPF, DKIM, and DMARC DNS records for Microsoft 365 and verify email authentication.
Exchange Server Zero-Day Exploits: HAFNIUM
Information about the HAFNIUM attacks targeting on-premises Exchange Server and the associated March 2021 security updates.
FortiGate: Only the Default Security Profile Is Available
How to display and manage multiple FortiGate security profiles in the FortiOS graphical interface.
Check SHA-1 and MD5 Hashes on Your Mac
Learn how to calculate SHA-1 and MD5 hashes on macOS and compare them with the checksums published by the software provider.
How to View SSL Certificate Details in Chrome
Learn how to view SSL certificate details in Google Chrome using Developer Tools.
How to Fix a Failed Database Content Index in Exchange Server 2013
How to repair a failed Exchange Server 2013 database content index and rebuild the search catalog.