--- title: "Muhammad Alfian Tirta Kusuma (@alfian08) | Hashnode" description: "Cloud Engineer. Read the latest articles by Muhammad Alfian Tirta Kusuma on Hashnode." url: "https://hashnode.com/@alfian08" --- @alfian08 # Muhammad Alfian Tirta Kusuma @alfian08 · Central Java, Indonesia · Joined July 2024 Cloud Engineer ### [Ingress-NGINX to Istio Migration on RKE2](https://blog-alfian.hashnode.dev/ingress-nginx-to-istio-migration-on-rke2?utm_source=hashnode&utm_medium=feed) Overview This post is a proof of concept (POC) for a migration scenario. It moves an RKE2 cluster from the bundled ingress-nginx controller to an Istio gateway that uses the Kubernetes Gateway API. Wh 19 min read · [blog-alfian.hashnode.dev](https://blog-alfian.hashnode.dev/ingress-nginx-to-istio-migration-on-rke2?utm_source=hashnode&utm_medium=feed) [Sep 24](https://hashnode.com/posts/ingress-nginx-to-istio-migration-on-rke2/6ab52ea83a6d38018ab3f2d8) ### [Intercepting Dangerous Shell Commands with Shellfirm](https://blog-alfian.hashnode.dev/intercepting-dangerous-shell-commands-with-shellfirm?utm_source=hashnode&utm_medium=feed) Shellfirm a lightweight safety layer to shells, inspecting commands and warning or blocking risky invocations (rm -rf, dd) to help prevent data loss. 3 min read · [blog-alfian.hashnode.dev](https://blog-alfian.hashnode.dev/intercepting-dangerous-shell-commands-with-shellfirm?utm_source=hashnode&utm_medium=feed) [Apr 18](https://hashnode.com/posts/intercepting-dangerous-shell-commands-with-shellfirm/69e33223974506f6b3ab3518) ### [Auditing Command Execution with Snoopy](https://blog-alfian.hashnode.dev/auditing-command-execution-with-snoopy?utm_source=hashnode&utm_medium=feed) Record every command executed on Unix-like systems with Snoopy and forward logs via syslog to SIEMs for auditing, forensics, and compliance. 2 min read · [blog-alfian.hashnode.dev](https://blog-alfian.hashnode.dev/auditing-command-execution-with-snoopy?utm_source=hashnode&utm_medium=feed) [Apr 18](https://hashnode.com/posts/auditing-command-execution-with-snoopy/69e33081974506f6b3aa1ca7) ### [Sending SSH Login Alerts to Telegram](https://blog-alfian.hashnode.dev/sending-ssh-login-alerts-to-telegram?utm_source=hashnode&utm_medium=feed) Send immediate Telegram alerts for SSH logins on Ubuntu 24.04 with secure alerting script and integrate with PAM 3 min read · [blog-alfian.hashnode.dev](https://blog-alfian.hashnode.dev/sending-ssh-login-alerts-to-telegram?utm_source=hashnode&utm_medium=feed) [Apr 18](https://hashnode.com/posts/sending-ssh-login-alerts-to-telegram/69e32f4f974506f6b3a94f09) ### [Preventing Brute Force Attacks with Fail2ban](https://blog-alfian.hashnode.dev/preventing-brute-force-attacks-with-fail2ban?utm_source=hashnode&utm_medium=feed) Fail2ban Gide. Includes installation, custom jails, ban tuning, iptables/nftables integration, and Telegram alerts. 5 min read · [blog-alfian.hashnode.dev](https://blog-alfian.hashnode.dev/preventing-brute-force-attacks-with-fail2ban?utm_source=hashnode&utm_medium=feed) [Apr 18](https://hashnode.com/posts/preventing-brute-force-attacks-with-fail2ban/69e32d99974506f6b3a80513)