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Brute-force attacks on SSH are a common threat to servers. In this guide, we’ll set up Fail2ban on a bare-metal Linux server to:

* Automatically ban IPs after repeated failed login attempts

* Use UFW to block attackers at the firewall level

* Send real-time Slack alerts with custom server names

Protect Your Server from SSH Brute-Force Attacks with Fail2Ban + UFW + Slack Notifications - code2deploy.com Brute-force attacks on SSH are a common threat to servers. In this guide, we’ll set up Fail2ban on a bare-metal Linux server to: This setup is free, secure, and production-ready. 1️⃣ Install Fail2ban sudo apt updatesudo apt install fail2ban -y 2️⃣ Configure Global Settings and SSH Jail Edi...

🔴 Malware Injection Scenarios Through Docker

One common attack scenario occurs when containers are left exposed to the internet without proper protections. For example, an exposed PostgreSQL container with weak or default credentials can be discovered by attackers using automated scanning tools like Masscan or Shodan. Once found, attackers can gain access using default passwords, SQL injection, or known CVEs, then execute commands to download and run malware such as cryptominers (kdevtmpfsi) or other malicious scripts inside the container. This malware can consume excessive CPU resources, attempt persistence via cron jobs, disable security tools, and even scan for other vulnerable systems. Similar risks exist for other services: exposed Redis containers can allow attackers to write malicious cron jobs or SSH keys; mounting the Docker socket or host filesystem gives attackers root access to the host; and using untrusted images can lead to supply chain attacks. The key takeaway is that any service exposed to 0.0.0.0 without proper authentication or restrictions is likely to be found and exploited within hours or days. Always bind internal services to 127.0.0.1, use strong passwords, avoid privileged mounts, and monitor container activity to prevent such attacks.

Docker and Kubernetes Security Checklist!! - DevOps Securing containerized environments is no longer optional — it’s essential. Whether you’re managing Docker, Kubernetes, or bare-metal servers, security misconfigurations can lead to major vulnerabilities.This guide provides a complete, production-grade security checklist covering Docker Compos...

Deploying a production-ready, self-hosted Kubernetes cluster—whether on-premises or on VPS—requires thoughtful planning across networking, storage, monitoring, high availability, and lifecycle management. This guide captures real-world implementation practices and tooling used in enterprises and by DevOps teams managing their own clusters.


(MetalLB/HAProxy/HardwareLB(F5)/Nginx
(Longhorn/Rook-Ceph/OpenEBS/NFS)
(Prometheus, Grafana, Loki/EFK)
(Velero, etcdctl, Longhorn Snapshots)
(HPA, KEDA
/CRD (Knative, KubeVirt)
-manager(Security & DNS, ExternalDNS, cert-manager, WireGuard, Calico)
(Node Problem Detector, Kured)

Building a Production-Grade Highly Available Self-Hosted Kubernetes Cluster - DevOps Overview Deploying a production-ready, self-hosted Kubernetes cluster—whether on-premises or on VPS—requires thoughtful planning across networking, storage, monitoring, high availability, and lifecycle management. This guide captures real-world implementation practices and tooling used in enterp...

Public-facing applications like FoodPanda—a food discovery and delivery platform—require robust, scalable data pipelines to serve multiple data-driven features such as personalized recommendations, real-time delivery tracking, and customer insights.

Designing a Complex Data Pipeline Architecture for a Public-Facing Application (FoodPanda) - DevOps Public-facing applications like FoodPanda—a food discovery and delivery platform—require robust, scalable data pipelines to serve multiple data-driven features such as personalized recommendations, real-time delivery tracking, and customer insights. In this blog, we’ll explore the entire lifec...

A WAF sits between the user and the web server — inspecting every request before it reaches your application. It evaluates traffic based on a set of rules designed to detect and block attacks like:

- SQL Injection

- Cross-Site Scripting (XSS)

- File Inclusion

- Cross-Site Request Forgery (CSRF)

- Cookie Poisoning

- Command Injection

- DDoS attacks

Understanding Web Application Firewalls (WAF): The Frontline Defense for Your Web Apps - DevOps In today’s digital age, websites and APIs are constant targets for malicious attacks. Whether you’re a startup, an e-commerce platform, or a large enterprise, your web application is a goldmine for hackers. That’s where a Web Application Firewall (WAF) comes in — acting like a digital bodygu...