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A collection of 9 posts

Configuring PAT on Cisco Routers (NAT Overload)

Configuring PAT on Cisco Routers (NAT Overload)

What is PAT (Port Address Translation)? PAT (Port Address Translation), also known as NAT Overload, is a form of Network Address Translation that allows multiple devices on a private network to share a single public IP address. Unlike one-to-one NAT, PAT uses port numbers to differentiate between multiple internal connections,

Configuring Dynamic NAT on Cisco Routers

Configuring Dynamic NAT on Cisco Routers

Welcome to another tutorial on Network Address Translation (NAT). In this post we'll be looking at how to configure Dynamic NAT on Cisco routers. I highly recommend that you first read through my previous post on configuring static NAT before continuing with this one. What is Dynamic NAT?

Configuring Static NAT on Cisco Routers

Configuring Static NAT on Cisco Routers

In my previous post on NAT, I explained the difference between the 3 different types of NAT that can be configured. In this tutorial I’m going to cover the configuration steps to configure static NAT. Static NAT is a one-to-one mapping. It allows us to translate a single IP

Mitigating SubSeven attacks

Mitigating SubSeven attacks

SubSeven – aka: Sub7 and Sub7Server is a backdoor program, in the form of a Trojan, used mostly for causing trouble on computer networks. It can be used for simple attacks such as hiding the mouse cursor and opening applications, but it can also be used for more serious attacks including

Configuring Syslog on Cisco Routers

Configuring Syslog on Cisco Routers

Syslog is a protocol used by network devices and other systems to send log messages to a central logging server. Cisco routers and switches can be configured to send their log messages to a syslog server, which helps network administrators monitor and troubleshoot their networks more effectively. What is Syslog?

Configuring SSH (Secure Shell) on a Cisco device

Configuring SSH (Secure Shell) on a Cisco device

SSH (Secure Shell) provides a secure way to connect to and manage network devices remotely. Unlike Telnet, which sends data in plain text, SSH encrypts all communication between the client and server, making it the preferred method for remote administration. This guide will show you how to configure SSH on

Hashing, What is it and how does it work?

Hashing, What is it and how does it work?

Hashing, often referred to as a hash function, is a fundamental concept in computer science and cryptography. It's a mathematical algorithm that takes an input (or 'message') of any size and produces a fixed-size string of characters, which appears random. This output is called a hash

Ports and their use.

Ports and their use.

Ports can be a confusing subject at first, and in this post I hope to clarify what ports are and how they are used. First, let's look at what a port is. A port is a logical connection point. In the networking sense, it is used to identify

How encryption works

How encryption works

Encryption is the process of converting readable information into a scrambled code that hides the information's true meaning. The purpose of encryption is to protect digital data confidentiality as it's stored on computer systems and transmitted using the internet or other computer networks. The outdated data