How to Locate Open Ports in Linux

Reading Time: 9 minutes
openports

What is a Port? 

First, let’s define what a port is. According to the IEFT, a port is: 

A logical entity for Internet communication. Ports serve two main purposes:
1. They provide a demultiplexing identifier to separate transport sessions between the same pair of endpoints
2. They may also identify the application protocol and associated service to which processes connect.

Wikipedia.com

In plain English, this simply means that a port is an endpoint through which data flows back and forth between two computers over a network. A computer has 65535 ports available to share information. These port numbers are based on a 16-bit number, which is where we derive the total number of available ports (0 to 65535).

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How to Install an SSL on a Core/Unmanaged Ubuntu Server

Reading Time: 8 minutes

Why do I Need to Install or Reinstall My SSL Certificate?

According to Globalsign;

The Certificate Authority (CA) industry was alerted of compliance implications related to the inclusion of a specific extension (OCSP-signing extended key usage) in CA certificates which has, under certain conditions, unintended compliance and security implications. A number of GlobalSign Issuing CAs have been impacted by this issue. While no key compromise or security incident has taken place, we will be revoking these Issuing CA’s as part of our remediation plan in accordance with the CA/B Forum Baseline Requirements and the GlobalSign CPS. Revoked intermediate certificates can cause errors in the validation of certificates signed by these Intermediate Certificates.

Globalsign.com
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How to Install an SSL on a Core/Unmanaged CentOS Server

Reading Time: 7 minutes

Why do I Need to Install or Reinstall My SSL Certificate?

According to Globalsign

The Certificate Authority (CA) industry was alerted of compliance implications related to the inclusion of a specific extension (OCSP-signing extended key usage) in CA certificates which has, under certain conditions, unintended compliance and security implications. A number of GlobalSign Issuing CAs have been impacted by this issue. While no key compromise or security incident has taken place, we will be revoking these Issuing CA’s as part of our remediation plan in accordance with the CA/B Forum Baseline Requirements and the GlobalSign CPS. Revoked intermediate certificates can cause errors in the validation of certificates signed by these Intermediate Certificates.

GlobalSign.com
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How to Share Encrypted Information

Reading Time: 6 minutes

This article will discuss the methods to send information securely over email using GPG/PGP as the main encryption tool. The difference between PGP and GPG is mainly that PGP is a proprietary solution controlled by Symantec, and GPG is the open-source standard that is defined by RFC 4880. Functionally, each format is virtually identical due to GPG being the offspring of the original PGP standard. Because there are numerous email clients, specific GPG settings will vary. For this tutorial, we will use Gmail and Thunderbird as examples. 

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How to Implement Zero Trust Security in 5 Steps

Reading Time: 6 minutes

What is Zero Trust Security?

Zero Trust security is the concept, methodology, and threat model that assumes no user, system, or service operating within a secured internal environment should be automatically trusted. It put forward that every interaction must be verified when trying to connect to a system before being granted access. This concept uses micro-segmentation, and granular edge controls based on user rights, application access levels, service usage, and relation to the location to determine whether to trust a user, machine, or application seeking to access a specific part of an organization.

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How to Repair the DNS DCV Error in cPanel

Reading Time: 5 minutes

How Using Cloudflare Affects AutoSSL in cPanel

We have provided information about Cloudflare, AutoSSL, and the advantages of utilizing those services in previous articles. In this article, we will focus on solving one of the specific issues seen when using Cloudflare and AutoSSL together on a cPanel/WHM server. These services function admirably in almost every setting and can be relied upon to deliver the service they advertise. However, in certain situations, services can clash through no fault of their own. 

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How Was My Website Compromised? 

Reading Time: 7 minutes

In this tutorial, we will look at several methods that are used to compromise a website. In today’s world, websites use multiple procedures that represent the core functions of a modern business. Whether you have an eCommerce site or a business card site, a website is essential for driving business growth. We can safely state that a website is a unique image of your respective business. 

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SSL vs TLS

Reading Time: 4 minutes

What is the relationship between an SSL and TLS? Most of us are familiar with SSL (Secure Socket Layer) but not TLS (Transport Layer Security). Both protocols are used to transmit online data securely between two endpoints. SSL is older than TLS, but all SSL certificates can use both SSL and TLS encryption. TLS is the replacement protocol to SSL as TLS is the updated version of the SSL protocol. TLS operates similarly to SSL by using encryption methods to ensure secure communication.

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How to Install and Configure OpenSSH on Windows Server 2019

Reading Time: 6 minutes

What is OpenSSH?

OpenSSH logo

OpenSSH is an open-source utility developed by The OpenBSD Project. SSH stands for “Secure SHell.” This service encrypts traffic on both ends, eliminating security risks from hackers or eavesdroppers. It can be used for remote operations like file transfers and offers key-based passwordless authentication. In this tutorial, we will demonstrate how to harness the power of SSH’s on your Windows server to send basic remote commands and transfer files using password authentication.

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