Santhi A, Author at Ezeelogin Blog | SSH Security, PAM & Linux Server Management https://www.ezeelogin.com/blog/author/santhi/ Expert articles on SSH jump servers, bastion hosts, SSH key management, PAM, RBAC, and Linux security. Practical guides from the Ezeelogin team. Wed, 04 Nov 2026 10:05:57 +0000 en-US hourly 1 https://wordpress.org/?v=7.1.4 RADIUS MFA for network devices https://www.ezeelogin.com/blog/radius-mfa-for-network-devices/ Tue, 03 Nov 2026 04:54:01 +0000 https://www.ezeelogin.com/blog/?p=2827 RADIUS MFA for network devices: how it works and where it breaks Most teams already have MFA on email, VPN and cloud consoles. The admin login on a core switch is often still a password, sometimes one shared by the whole network team. RADIUS MFA, also called RADIUS 2FA, is the usual way to fix

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]]> SSH Gateway: Secure Privileged Access to Linux Servers https://www.ezeelogin.com/blog/ssh-gateway-secure-privileged-access-to-linux-servers/ Fri, 24 Jul 2026 07:57:30 +0000 https://www.ezeelogin.com/blog/?p=2807 What Is an SSH Gateway? A Complete Guide to Centralized Secure SSH Access Introduction As organizations expand their infrastructure across cloud platforms, on-premises data centers, and hybrid environments, securing administrative access becomes increasingly complex. Administrators often require secure access to hundreds or even thousands of Linux servers, network devices, and cloud instances. Traditional methods such

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]]> Copy Fail (CVE-2026-31431): Linux Privilege Escalation — Detection, Patches & Mitigation https://www.ezeelogin.com/blog/copy-fail-cve-2026-31431/ Thu, 14 May 2026 06:39:18 +0000 https://www.ezeelogin.com/blog/?p=2682 What Is Copy Fail(CVE-2026-31431) local privilege escalation (LPE) vulnerability ? Copy Fail (CVE-2026-31431) is a high-severity local privilege escalation (LPE) vulnerability in the Linux kernel’s cryptographic subsystem. Disclosed publicly on April 29, 2026 by security research firm Theori, it allows any unprivileged local user to escalate to root using a 732-byte Python script — with

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]]> Linux Kernel “Dirty Frag” Privilege Escalation Vulnerability: What You Need to Know https://www.ezeelogin.com/blog/linux-kernel-dirty-frag-privilege-escalation-vulnerability/ Wed, 13 May 2026 13:20:45 +0000 https://www.ezeelogin.com/blog/?p=2660 What is the Dirty Frag Vulnerability? Dirty Frag is a high-severity local privilege escalation (LPE) vulnerability chain affecting the Linux kernel. Publicly disclosed on May 7, 2026, it allows an unprivileged local user to gain full root access on a wide range of Linux distributions — in a single command. The vulnerability was discovered and

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]]> SSHStalker: A deep dive into the new IRC-controlled Linux botnet infecting thousands of servers https://www.ezeelogin.com/blog/sshstalker-a-deep-dive-into-the-new-irc-controlled-linux-botnet-infecting-thousands-of-servers/ Thu, 19 Feb 2026 04:02:51 +0000 https://www.ezeelogin.com/blog/?p=2456 In early 2026, cybersecurity researchers uncovered a stealthy Linux botnet operation that has infected nearly 7,000 servers worldwide — not with advanced AI or zero-day exploits — but by resurrecting old-school techniques: SSH brute-force compromise, decade-old Linux vulnerabilities, and text-based IRC (Internet Relay Chat) command-and-control (C2) communication. Dubbed SSHStalker, this campaign staggering in scale highlights

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]]> Critical Privilege Escalation Vulnerability Discovered in Dropbear SSH Server https://www.ezeelogin.com/blog/critical-privilege-escalation-vulnerability-discovered-in-dropbear-ssh-server/ https://www.ezeelogin.com/blog/critical-privilege-escalation-vulnerability-discovered-in-dropbear-ssh-server/#respond Fri, 16 Jan 2026 13:19:49 +0000 https://www.ezeelogin.com/blog/?p=2196 The open-source Dropbear SSH server, widely deployed on embedded devices, routers, and lightweight systems like OpenWRT, has been found to contain a serious privilege escalation flaw. This vulnerability could allow an authenticated user to execute arbitrary programs with root privileges — essentially giving them full control over the system. This flaw is tracked as CVE-2025-14282

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]]> https://www.ezeelogin.com/blog/critical-privilege-escalation-vulnerability-discovered-in-dropbear-ssh-server/feed/ 0 Dropbear: A Lightweight SSH Solution https://www.ezeelogin.com/blog/dropbear-a-lightweight-ssh-solution/ Fri, 16 Jan 2026 13:06:55 +0000 https://www.ezeelogin.com/blog/?p=2191 What is Dropbear SSH? Created by Matt Johnston, Dropbear is a relatively small SSH 2 server and client. It is designed to replace OpenSSH in environments where memory and processor resources are limited. Unlike OpenSSH, which is a massive suite of tools, Dropbear is often compiled as a single multi-call binary. This single file can

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]]> SSH Tunneling: A Complete Guide to Secure Network Access https://www.ezeelogin.com/blog/ssh-tunneling-a-complete-guide-to-secure-network-access/ Fri, 16 Jan 2026 08:33:10 +0000 https://www.ezeelogin.com/blog/?p=2180 Introduction In today’s interconnected world, securing data as it travels across networks is more important than ever. Whether you’re accessing a remote server, managing databases, or working from an untrusted network, exposed connections can become easy targets for attackers. SSH tunneling offers a powerful yet lightweight solution by encrypting network traffic and safely forwarding it

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]]> Access Control: Types and Benefits https://www.ezeelogin.com/blog/access-control-types-and-benefits/ Fri, 16 Jan 2026 06:49:33 +0000 https://www.ezeelogin.com/blog/?p=2171 Access control is one of the most fundamental pillars of cybersecurity and operational governance in any organization. It defines who can access specific systems, applications, data, or physical resources, ensuring that only authorized individuals can perform permitted actions. Proper access control is essential for protecting sensitive information, maintaining business continuity, and meeting regulatory obligations.  

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]]> Authentication Vs Authorization https://www.ezeelogin.com/blog/authentication-vs-authorization/ Fri, 31 Oct 2025 11:43:25 +0000 https://www.ezeelogin.com/blog/?p=2069 In today’s digital era, cybersecurity has become a major concern for individuals and organizations alike. One key aspect of securing systems is controlling access to digital devices and data. This is where the concepts of authentication and authorization come into play. In this article, we will explain what authentication and authorization are, the key differences

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