I am finally getting started with using a database instead of a spreadsheet to track my clients. This came after a lost an entire column somehow.
It did the thing where you can drag and have it auto increment numbers.
Anyway, I am playing around with DBbrowser and sqlite. Eventually I will need to host the data base and have multiple users access it. Am I wasting my time with what I am currently using?
Maybe there is another solution? Most users will not be technical.
One of the most often overlooked features of #Tailscale is the ability to send a file to a remote machine that's part of your TailNet without FTP, SFTP, or rsync. #sysadmin
System Administration
Week 8, The Simple Mail Transfer Protocol, Part III
In this video, we look at ways to combat Spam. In the process, we learn about email headers, the Sender Policy Framework (#SPF), DomainKeys Identified Mail (#DKIM), and Domain-based Message Authentication, Reporting and Conformance (#DMARC). #SMTP doesn't seem quite so simple any more...
Intéressante technique pour l’authentification #SSH basée sur des clés récupérées dynamiquement : https://jpmens.net/2025/03/25/authorizedkeyscommand-in-sshd/ #sysadmin
System Administration
Week 8, The Simple Mail Transfer Protocol, Part II
In this video, we observe the incoming mail on our MTA, look at how STARTTLS can help protect information in transit, how MTA-STS can help defeat a MitM performing a STARTTLS-stripping attack, and how DANE can be used to verify the authenticity of the mail server's certificate.
A Visual Guide to SSH Tunnels: Local and Remote Port Forwarding - Article by Ivan Velichko #Network #SysAdmin https://iximiuz.com/en/posts/ssh-tunnels/
Pre-Weekend Server maintanance:
- Patched all Proxmox VE Servers to 8.3.5 and latest OS updates
- Patched burningboard.net Mastodon instance to latest os updates
- Patched all my RHEL systems to latest state and rebooted them
- Updated my Home-Server and Home-Assistant to version 2025.3.4
- Updated Red Hat Satellite to version 6.16.3
- Decomissioned last Fedora server and removed Fedora 41 repositories from Satellite.
- Verified status of my Backup infrastructure and that all servers are backed up properly
- Checked monitoring (check_mk and Grafana/Loki) for errors
All done, weekend can come :-)
Of course it's a Friday when we discovered that on 45/70 cluster nodes hyper threading was enabled.
Today all systems got the new configuration sent to, just waiting for reboot to apply it.
So we drained the respectable nodes and now give the Monday team the duty to reboot and scare
#sysadmin
There are important tasks and projects I know need done, have been screaming they need done *for years*, but always get pushed to the back and never actually worked because some asshole in the C-suite just signed another contract for some fucking platform they didn't vet, didn't let us vet, and that we don't need but takes 8 months to implement and then is left abandoned after just a week after going live when nobody uses it.
Hey Mastodon, question for my #sysadmin and #DevOps types. Has anyone used #Pester and #PSScriptAnalyzer to set up unit testing for test driven development, particularly on (relatively) simple #PowerShell scripts like you might use for application detection, installation, and uninstallation from a system like #SCCM #Intune or #ManageEngine ?
Apologies for the buzzword bingo, but I’m trying to reach folks who may be following the hashtags, but not necessarily have a connection otherwise.
This is one of those post-migration mornings when you wait for the phone to ring because someone might have had/have a problem, but you hope it doesn't ring because that would mean no one has had any issues. So far, everything is fine. 
