Anthony Rethwisch
@RethwischTech
Systems Admin & Network Engineer ⚙️ | MikroTik • WireGuard • PowerShell | Sharing real-world IT setups that just work 💻
Don’t just fix issues. Improve the system that allowed them to happen. #SysAdmin #Automation #ITLeadership
The best compliment a SysAdmin can get? “No one noticed.” That means everything ran smoothly. #SysAdmin #ITCareer #TechTwitter
Ping isn’t a monitoring solution. It’s a heartbeat, not a diagnosis. #Networking #SysAdmin #ITInfrastructure
Backups are part of security. A ransomware plan without verified offline backups is just wishful thinking. #CyberSecurity #SysAdmin #ITSecurity
Need to find which servers are missing Windows updates? Get-WUList | Where-Object {$_.IsInstalled -eq $false} Simple visibility saves big headaches. #PowerShell #Automation #SysAdmin
When setting up a MikroTik router, always create address lists for subnets. It makes firewall rules cleaner and troubleshooting easier. Clarity beats chaos. #MikroTik #Networking #SysAdmin
There’s no better feeling than fixing an issue no one else could find. That’s the moment you remember why you got into IT. #SysAdmin #ITLife #Networking
Calm is a sysadmin’s superpower. Anyone can panic. Professionals diagnose. #SysAdmin #ITCareer #TechTwitter
If your only network map is in your head, you’re one PTO day away from chaos. #SysAdmin #Networking #Documentation
Admin accounts shouldn’t be your daily drivers. Use them when you need them — lock them down when you don’t. #CyberSecurity #SysAdmin #ITSecurity
Stop manually checking disk space on servers. Get-PSDrive | Where-Object {$_.Free -lt 10GB} Run it once a week, export results, and save yourself a headache. #PowerShell #Automation #SysAdmin
When setting up new sites, test your backup WAN before you need it. Failover that hasn’t failed over isn’t a backup. #Networking #SysAdmin #ITInfrastructure
🧵 3 MikroTik firewall rules I always include in new setups 👇 1️⃣ Drop invalid connections 2️⃣ Allow established and related 3️⃣ Drop everything else not explicitly allowed Simple. Fast. Secure. #MikroTik #Networking #SysAdmin
The best advice I ever got: “Never troubleshoot angry.” Take a breath. Reboot yourself before the server. #SysAdmin #ITLife
Good SysAdmins fix problems. Great SysAdmins prevent them. #SysAdmin #ITLeadership #TechTwitter
If your “disaster recovery plan” only exists in your head, you don’t have one. #SysAdmin #ITInfrastructure #BusinessContinuity
Security isn’t a product you buy. It’s a habit you practice. #CyberSecurity #SysAdmin #InfoSec
VLANs aren’t about complexity. They’re about clarity. When your traffic has a purpose, your troubleshooting has direction. #Networking #MikroTik #SysAdmin
Don’t overcomplicate PowerShell. 90% of the time, it’s: Get → Filter → Select → Export The magic is in the pipeline, not the syntax. #PowerShell #Automation #SysAdmin
Being a SysAdmin isn’t about keeping things running. It’s about designing systems that keep running without you. #SysAdmin #Automation #TechTwitter
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