Slurp’it – Network Inventory & Discovery Tool

I recently came across a neat tool called 'Slurp'it', a Network Inventory and Discovery solution. If you've been following my blog for a while, you know I just had to give it a try and share my findings with you. So, in this post, I'm going to quickly go over how to get it up and running, along with a few ways you might find it useful. Let's dive in.

What We Will Cover?

• What is Slurp'it?
• Licenses
• Installation and Setup
• Data Collection
• Custom Planning
• Some Use Cases

What is Slurp'it?

The official definition is "Slurp’it is a powerful and easy-to-use network discovery solution that offers 100% accurate network inventory. No coding required." Out of the box, the tool supports almost all the vendors (117 as of writing this)

In a nutshell, Slurp'it simplifies the whole process of understanding your network's inventory. All you need to do is provide the IP address or hostname of your devices, along with the login credentials. Slurp'it takes it from there. It executes various 'show' commands on your devices, usesTextFSM to parse the outputs, and finally presents you with a tidy table detailing everything it has discovered. It's straightforward yet effective, Continue reading

Palo Alto EDL Hosting Service Example (GitHub URLs)

In this short blog post, we'll explore what the EDL (External Dynamic List) hosting service is and how it solves problems for us. An External Dynamic List is a text file that is hosted on an external server so that the firewall can import objects—IP addresses, URLs, domains—included in the list and enforce policy. To enforce policy on the entries included in the external dynamic list, you can reference the list in a security policy.

EDL Hosting Service

The EDL Hosting Service is a list of SaaS application endpoints maintained by Palo Alto. Each Feed URL contains an external dynamic list (EDL) that is checked daily for any new endpoints added to the publicly available Feed URLs published by the SaaS provider. 

When a SaaS provider adds a new endpoint for a SaaS application the corresponding Feed URL is updated. Leveraging the EDL Hosting Service allows for dynamic enforcement of traffic to and from your SaaS application without the need for you to host and maintain your own EDL.

GitHub Example

For an example, imagine you want to let users SSH into GitHub repositories. Without EDL, you'd either risk security by allowing SSH to 'all IP addresses' or manually Continue reading

Automating NetBox with Ansible

In this post, we're diving into automating NetBox with Ansible. We'll explore how to leverage Ansible's modules to fully automate setting up NetBox. I'll guide you through a simple scenario where we configure a single site, including two racks and several devices, and even detail setting up cabling through a patch panel using Ansible. This approach simplifies the whole process, and I'll make sure it's straightforward for you to follow and apply.

You can clone my repo from GitHub to follow along. I've included everything you see here in the repo, making it easy for you to get hands-on experience.

What we will cover?

• Why do we need Ansible?
• Prerequisites
• Diagram
• Basic Ansible Playbook
• Creating Sites, Racks, Devices and Cables

But why do I need Ansible though?

You might be thinking, "Why do I need Ansible? Can't I just set up and use NetBox manually?" Sure, you could if that's what works best for you and your team. But here are my reasons for choosing Ansible (or any other automation tool) over manual configuration:

Firstly, I'm not a fan of clicking through the GUI. It might seem quicker at first, but repeating the same tasks over and over can Continue reading

Ansible Subelements Lookup Example

When you're working with Ansible, you often come across situations where you need to deal with lists inside of lists. Imagine you have a bunch of servers, and each server has its own set of services to manage.

The subelements lookup plugin is designed to iterate over a list of dictionaries and a specified sub-list within each dictionary. Instead of writing complicated code to dig into each layer, subelements lets you glide through the outer list and then dive into the inner list easily.

What we will cover?

• Subelements syntax
• Subelements example
• What are item.0 and item.1?
• Subelements example with NetBox

Subelements Syntax

To use subelements in your playbook, you write a loop that tells Ansible what main list to look at and which sublist to go through. Here’s what a simple line of code looks like.

loop: "{{ query('subelements', your_main_list, 'your_sublist_key') }}"

your_main_list is where you have all your main items (like servers), and your_sublist_key is the name of the sublist inside each main item (like tasks for each server). Ansible will then loop through each main item and its sub-items in turn.

Ansible Subelements Example

Suppose you have the following data structure defined in your playbook.

 Continue reading

How to Export Large Traffic Logs from Palo Alto Firewall?

Recently, I faced a unique challenge, I needed to export a massive amount of traffic logs from a Palo Alto Firewall for analysis. Initially, I thought it would be straightforward, log into the GUI, apply the necessary traffic log filter, and export the logs as a CSV file. Easy peasy, right? Well, not exactly. I quickly ran into a roadblock that made me rethink my approach.

In this blog post, I'll share the hurdles I encountered and how I managed to find a workaround to export the logs and analyze them using Python Pandas.

The Problem

By default, Palo Alto only exports 65535 rows in the CSV file, which is not nearly enough. If you have a large network, that amount might only cover a few minutes of logs. Even if you change the value, the maximum it can support is 1048576, which might cover maybe an hour's worth of logs. But for my use case, I needed at least a month of logs. I couldn't get what I wanted from the built-in report options, so I was scratching my head. I then tried to export the logs via SCP on the CLI, but again encountered the same maximum row Continue reading

SuzieQ Network Observability

In today’s post, we’re exploring SuzieQ, an open-source network observability platform that’s making waves in the way we monitor and understand our networks. It supports a wide array of devices from top vendors like Arista, Cisco, and Juniper, among others. We’ll start with the fundamentals and finish with a practical example to clearly illustrate how SuzieQ sets itself apart from other automation tools.

What We Will Cover?

1. What exactly is SuzieQ?
2. How does SuzieQ work?
3. How to install SuzieQ?
4. SuzieQ terminology (Configuration, Inventory, suzieq-cli, poller)
5. Configuration and Inventory files
6. Examples using OSPF Topology
7. Path Analysis

What Exactly is SuzieQ?

I first came across SuzieQ a while back but didn't dive deep into it because tools like Netmiko or Napalm were fitting my needs just fine. That changed when I tuned into a recent Packet Pushers podcast featuring Dinesh Dutt, the brain behind SuzieQ. Hearing him talk about it got me really interested.

After the podcast, I couldn't hold back from giving SuzieQ a try. There have been many times when I found myself writing custom scripts to get things done, only to discover that SuzieQ could have handled those tasks much more smoothly.

So, what is SuzieQ? In simple Continue reading

How do we overcome Imposter Syndrome?

I was thinking of writing about Imposter Syndrome for so long but I didn't because I thought someone might figure out I don't know what I am talking about.

This is so real, I'm not even kidding. The feeling of doubting your abilities and feeling like a fraud. It's something many of us experience, especially when we're stepping out of our comfort zones or tackling new challenges. So, I decided to face this head-on and share some ways to deal with it. First, it's important to recognize when we're being too hard on ourselves. We often set unrealistically high standards and then beat ourselves up when we don't meet them. It's okay to not know everything – after all, we're all learning as we go.

Talking to others can also be a big help. You'll often find that many people feel the same way and have their own experiences with Imposter Syndrome. This can be a huge relief to know you're not alone in this.

What Exactly is Imposter Syndrome?

In plain terms, it's when you feel like you're not as competent as others perceive you to be. You might think you're not good enough, despite there being clear signs Continue reading