Cyber security on Nerdsid.com

11 Essential OpenSSH Components

Sat, 29 Nov 2025 20:05:20 +0530

You might have SSHed into servers hundreds of times.

You might have used ssh-add to load keys into your agent.

You might have used scp to copy files back and forth between your machine and server.

But have you ever paused and looked at the bigger picture?

All these commands come from one place — the OpenSSH suite. It’s much more than just ssh and scp.

OpenSSH components

OpenSSH has 11 major components.

10 Steps to Secure a New Linux VM

Wed, 22 Oct 2025 07:09:42 +0000

When you launch a new Linux VM, the level of security you really need depends on your use case. That said, there are some basic steps you can take right after provisioning a new VM, to improve it’s baseline security. Following these steps won’t make your server invincible, but it will make it safe and reduce exposure to common attacks.

1. Update your system

Newly deployed images can contain outdated packages with known vulnerabilities. Start by updating everything:

Protect Your Email: Share It Safely on Websites With ROT47 Encryption

Fri, 06 Dec 2024 08:28:20 +0000

So, you want to share your email on your website, but you’re worried about spam?

Sharing your email address in plaintext (without any encryption) can be risky. When you post your email openly on a website or blog, it becomes visible to web crawlers and spambots. These bots scour the internet, collecting email addresses to send spam and unwanted marketing emails. Over time, this can lead to your inbox being flooded with irrelevant messages.

Demystifying DKIM Records: How They Safeguard Your Email Communications

Thu, 01 Sep 2022 05:27:57 +0000

Introduction

Email has become a crucial way of communication in today’s digital world. However, it’s also a target for scammers and impersonators. Thus it is essential to have methods to verify that the messages we receive are genuine and have not been tampered with. That’s where DKIM (DomainKeys Identified Mail) records come into play. In this article, we will understand how DKIM records assist in safeguarding emails against tampering.

What is DKIM?

DKIM is an email security standard designed to make sure that an email that claims to have come from a specific domain was indeed authorized by the owner of that domain.