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    New blog post: GeoIP-Aware Firewalling with PF on FreeBSDRunning a mail server means constant brute-force attempts. My solution: geographic filtering. SMTP stays open for global mail delivery, but client ports (IMAP, Submission, webmail) are restricted to Central European IP ranges only.Result: ~90% reduction in attack logs, cleaner signal-to-noise ratio, smaller attack surface.Using MaxMind GeoLite2 + PF tables with ~273k CIDR blocks.https://blog.hofstede.it/geoip-aware-firewalling-with-pf-on-freebsd/#FreeBSD #InfoSec #SysAdmin #pf #DevOps
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    And one more server (including jails) cleanly upgrade to FreeBSD 15.0-RELEASE All running nicely 🙂 #freebsd #freebsd15 #sysadmin
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    Diventa padrone del tuo storage su Linux 💪🐧Ecco i comandi essenziali per gestire dischi, partizioni e file system come un vero sysadmin. Spremi al massimo le prestazioni I/O e tieni il tuo sistema sempre scattante ⚡ Trovi tutte le infografiche su Linux seguendo il gruppo FediLUG su 👉 @linux@diggita.com #Unolinux #Linux #DevOps #SysAdmin #FLOSS #OpenSource #GnuLinux #freesoftware #softwarelibero
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    The client has a terrible, unreliable FTTC connection. So, this morning, I've been testing several devices and 4G carriers to find a reliable alternative when the FTTC is full/down.The good, old LTE12 Chateau is the best for this task, giving a stable and reliable 220/50 Mbit/sec thanks to carrier aggregation.The newer but smaller hAP ax lite LTE6 is still giving a good result, around 100/50 - expected, as it's "only" a LTE6. This will probably come to my office, while I'm waiting for the Chateau 5G (LTE20) to arrive - probably not before middle of November.Now, I need to create proper queues and rules to manage the two connections - at the moment, I've implemented only the failover and some simple queues on the FTTC.Lunch time.#Mikrotik #IT #SysAdmin #MorningFun