DISCLAIMER

I work in the enterprise market, mostly with routing&switching, wireless, security products from multiple vendors. I have no SDN/cloud/ISP real experience yet. My views here are based upon meetings with vendors pushing SDN solutions and fellow engineers who shared experiences, doubts and some labs to …

For the second year I'm honored to be part of the Cisco Champion crew.

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Last week I had the opportunity to attend a "Cisco Meraki Masters" session at Meraki HQ in San Francisco.

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I got inspired by the book "The 1 Thing" and changed a little bit my behavior about work and training I'd like to share here to discuss and improve.

The Background

A while ago one guy could setup a bunch of physical servers, install/configure/manage OS, configure network equipment and setup a firewall to …

Ladies and gentlemen, welcome to my new website!

I mean site url, content and topics are still the same but but now I use Hugo instead of Wordpress.

Why change

Speed: my website got slower and slower. Static pages are fast, very fast.

Easy of use: I started to use markdown to write posts then copy&paste them in …

ASA doesn't boot:

1Launching BootLoader...
2Default configuration file contains 1 entry.
3Searching / for images to boot.
4Loading /asa825-k8.bin... Booting...
5
6Press ESC to interrupt boot:
7
8Use BREAK or ESC to interrupt boot.
9Use SPACE to begin boot immediately.

We're now in rommon:

1rommon #0>

Check …

Office 365 is widely used between many customers. Some of them happen to manage all the Internet connections through a Cisco ASA, not the fancy ASA-X with Firepower, just the plain old 5510.

I was asked to allow Office 365 traffic, looks easy huh?

Step 1: know your enemy

After some Google-fu I found Microsoft kindly …

As it often happens, everything begins with a call from a customer with a problem.

The problem is related to WiFi roaming in a warehouse with clients disconnecting from RDP sessions. The clients are industrial PCs installed on forklifts that move quite fast (and dangerously).

Second rule of troubleshooting: measure

As …

Customer site, their security policy for WiFi is an SSID with a secret PSK: the IT manager types the password on my PC to allows me to access the network.

Maybe he's not aware of my keylogger that the password con be easily retrieved in cleartext. Let's see how.

Windows 10: retrieve the WiFi PSK in cleartext

Show a …

The Cyberspace a.k.a. the Internet is full of bad guys wanting to mess with our computers right?

Of course everyone of us have a firewall configured with proper access and inspection rules, don't ya?

Spamhaus and Team Cymru can help providing list of known bad IPs and subnets that should be filtered in our networks. …

The need

If you work with Linux machines and you don't use a terminal multiplexer you're doing it wrong.

What is a terminal multiplexer?

It lets you switch easily between several programs in one terminal, detach them (they keep running in the background) and reattach them to a different terminal.

The Solution

I use …

Linux scripting is a skill every network/system engineer should learn in the early stages of the career. Plenty of guides available in the interwebz, The Bash Academy is a good start.

A particular type of scripts are the one-liners: just a line of code to solve a problem.

This is the latest I've used while testing …

The Problem

Notes, code and configuration snippets, links, screenshots... where/how to save them and allow and easy/fast way to tag/search them when needed?

The Solution

In my opinion the best software for notes is Onenote today.

One note has a better integration with Windows 10, it's free, supports multiple platforms …

Hi CLEUR!

This year, for the fourth year in a row, I've attended Cisco Live Europe.

I've earned the "Netvet" status, that means my name was on the wall before the keynote, ain't that great? ;-)

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The problem

In my last post about Linux at command I talked about notifications on my mobile.

In most of my automation scripts I prefer notifications to come to my mobile instead of via email or SMS (really? in 2015?) because:

• it is always with me
• I check it thousands times a day (I know you too ;-) )
• it is a …