NetPrepare Blogs

Traceroute

The traceroute command offers many options to customise its behaviour, such as using different protocols (UDP, ICMP, TCP), disabling DNS lookups, adjusting the number of probes per hop...
These options help troubleshoot network connectivity issues and diagnose firewalls or other network policies.

DHCP Snooping

Mastering DHCP Snooping: Enhance Your Network Security

OpenSSL cheatsheet

OpenSSL is a versatile open-source library that primarily deals with secure communications.
In this blog we will show you:
Generate private and public keys.
Create certificate signing requests.
Sign certificates with a CA or self-sign.
Check, extract, and encrypt key pairs.

Securing Your Network Access with 802.1X

In our increasingly connected world, the security of our networks has never been more critical knowing who is on your network and what machines they are using is the foundational step towards ensuring a secure and well-managed environment.

Automate Meraki Device Renaming

Efficiently renaming your Meraki devices without manual hassle. Learn how to use a Python script and a CSV file to streamline the renaming process, saving you time and effort

802.1x EAP peap and EAP tls

802.1x authentication is a security protocol that provides an efficient and reliable means of controlling network access. In this doc, we will review EAP PEAP and EAP TLS.

BGP Internet Edge

Border Gateway Protocol (BGP) is a widely used routing protocol. This blog will discuss the configuration of two BGP internet edge routers advertising a /23 subnet and working as primary and secondary for each other for the /24 subnet.

Sumologic Troubleshooting

In this blog, we will discuss how to troubleshoot the sumologic collector from Syslog not showing to troubleshoot Script Alerts and how we can change the collector listening interface.

Firewall Benefits

When it comes to cybersecurity, your business can never be too safe. That's why a network firewall is vital in protecting your company's data. A firewall monitors and controls the traffic coming in and out of your network. This blog post will discuss the benefits of using a network firewall and how to harden it.

Meraki

Cisco Meraki's Cloud Networking enables distributed networks to be easily and centrally configured and managed over the web. This provides the benefits of centralized management with the added flexibility and resilience of distributed architecture.

Napalm Python

Napalm is a powerful Python library that is used to automate and interact with network devices. It provides an easy-to-use platform to configure and manage network devices, such as routers and switches, using native protocols like NETCONF and SSH. 

SumoLogic SEIM

SumoLogic SEIM helps you to collect, monitor, and analyze data from multiple sources. It enables you to create custom views of your data with drag-and-drop dashboards and powerful visualizations.

Layer 1 and 2 checklist

When assessing your network, there are a few key areas you'll want to focus on. These include both network infrastructure and network security.
In this blog, we go over the layer 1 and layer 2 checklists. By following this network assessment checklist, you can avoid common network problems and keep your network operating at its best

Automating OS Upgrade

As a system administrator, you will have to upgrade the OS on your network devices quite often. This is a time-consuming task, especially for a large network.
Luckily, you don't have to do it manually. In this article, we will show you how to upgrade your devices using our netmiko script.

Netmiko

If you're like most network professionals, you're always looking for ways to speed up your network management tasks. Well, look no further! Python Netmiko can help you automate your networking tasks and save you a lot of time.

TCPDUMP

Is a powerful tool for network troubleshooting, packet analysis, and security auditing used by system administrators and network engineers. It allows users to capture and interpret packets that are transmitted or received over a network.

Multicast Notes

Multicast is a method of sending data to multiple computers simultaneously. It can be used for things like streaming audio or video or distributing information to large groups of people.
This cheat sheet of all the multicast protocols IGMP, PIM dense, PIM sparse, Anycast and MSDP, Source-specific multicast, Bidirectional PIM, Multicast BGP and IPv6 Sparse-Mode Multicast

MPLS Notes

MPLS is a packet-switched technology that enables the creation of virtual private networks (VPNs). MPLS uses a label-switching technique to route data packets between network nodes. 

We created a cheat sheet for MPLS, that covers Label Distribute Protocol (LDP), Traffic Engineering (TE), and MPLS VPN

BGP Notes

Before beginning a network assessment, it is important to have a clear understanding of the network's BGP configuration. This document provides a deep dive into BGP; we go over Neighborship workflow, Tshoot peering down, Tshoot flapping peer, Best path selection, Tshoot missing routes, Multipath, Confederation, Route-Reflector, Securing connection and a more 

OSPF Notes

In this doc, we go over OSPF Neighbour status, neighbour troubleshooting, the different LSA types, and what they are used for. Also, the different Area types.

Linux cheat sheet

We created this Linux cheat sheet which goes over Linux known directory, basic commands, In-Out redirection, SSH, SCP, SFTP, GREP, file, dir, documentation, hard & soft links, users , account, groups, compression, CPU, Memory

ISIS Notes

In this doc, we create notes for the ISIS protocol.

CLNS router-ID, ISIS packets, ISIS level 1/ level2 router, IS-IS network type, DIS Election, level and adjacency, network type, and ISIS path selection

TCP IP

In this doc, we go over the IPv4, IPv6 header, IPv6 network discovery protocol, DHCP, DNS and the TCP packet and communication.