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Category: Networking

IT

[SysAdmin] Create isolated WiFi network on OPNSense with local wireless interface

  • stefano
  • Posted on 20th July 2018
  • No Comments

During the last months I am using OPNSense as my firewall (moving away from PFSense). At the very beginning I was using it on an apu2d board but then I…

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Linux Admin

Configure OpenVSwitch and libvirt to enable trunking (802.1q) between KVM Guests

  • stefano
  • Posted on 8th January 2017
  • No Comments

The goal of this article is to cover a complete configuration of OpenVSwitch and KVM networking to have ports of the virtual switch allowing trunking toward the KVM guests. The…

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OSPF topology
Cisco

[Networking Lab] GNS3 Lab to practice with OSPF LSA types and areas (TCP/IP Volume I)

  • stefano
  • Posted on 2nd April 2016
  • 3 Comments

Here we go with another Lab with GNS3 and IOU. This time is to review and practice the OSPF configurations as well as LSA types, Areas, routing table, virtual links…

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GNS3 - RIP and RIPng TCP/IP Volume 1 Topology
Cisco

[Networking Lab] RIP and RIPng configuration exercise (TCP/IP Volume 1)

  • stefano
  • Posted on 19th March 2016
  • No Comments

Hi there! Yet another GNS3 laboratory for a bit of practice. This time I arranged the starting configuration to play with RIP and RIPng following the exercise found on TCP/IP…

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TCP_IPVol1_Chap3_exer3_GNS3_topo
Cisco

[Networking Lab] Static route and load sharing practising (TCP/IP Volume 1)

  • stefano
  • Posted on 13th March 2016
  • No Comments

This GNS3 laboratory is a simple reproduction of the Configuration exercise number 3 of Chapter 3 (static routing) of the well known book TCP/IP Volume 1 for the CCIE professional…

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IT

[Networking] Select a mask so that there will be a specific number of subnets and hosts available

  • stefano
  • Posted on 11th March 2016
  • No Comments

This is mainly a reminder for myself and for who is working with subnetting and with the always arising question about how to work with subnets design. The question to…

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GNS3 802.1x Topology
Cisco

[Networking Lab] Configure 802.1x authentication on Cisco switch IOU with GNS3

  • stefano
  • Posted on 20th September 2015
  • 12 Comments

In this post I will show you again the power of GNS3 in doing laboratories to test new features. I will provide you a Lab example to configure and test…

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GNS3 ready to use
GNS3

[Networking – Lab] Ready-to-go GNS3 Switch and Routers config for your lab.

  • stefano
  • Posted on 23rd May 2015
  • No Comments

A lot of times, when you would like to reproduce some behavior in a Network, you need to add a lot of basic configs on your routers and switches. You…

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Tunnel GRE + IpSEC Topology
GNS3

[Networking] Alternatives to packet tracer (was: Softwares to build a virtual lab)

  • stefano
  • Posted on 10th May 2015
  • 2 Comments

Maybe this article will not bring to your knowledge something new, but it happened to me in the recent past that not all the friends and collegues I was talking…

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Networking

[Networking – LAB] Basic MPLS topology

  • stefano
  • Posted on 3rd May 2015
  • 6 Comments

While reviewing MPLS topics you can't avoid to try how the technology works doing some labs. This is particularly valid if you don't have the opportunity to "touch" the technology…

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OSPF Area types LAB topology screenshot
IT

[Networking – LAB] OSPF, get familiar with LSA types and AREAs

  • stefano
  • Posted on 12th April 2015
  • No Comments

I am always reviewing Routing topics to have them all the time fresh in my mind, especially when I don't practice with them a lot during daily works. This time…

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DMVPN Lab GNS3 topology
Cisco

[Networking – LAB] DMVPN GNS3 preconfigured lab for Yasser Auda Workbook

  • stefano
  • Posted on 5th April 2015
  • No Comments

As promised in my recent post about DMVPN online and free study resources, I prepared a small topology for a Laboratory that helps you practising with DMVPN. The topology is…

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DMVPN topology
Cisco

[Networking] DMVPN – Online study resources

  • stefano
  • Posted on 28th March 2015
  • 1 Comment

This is a very quick post to provide some documents to read and study if you are interested in learning DMVPN technology. I added a very short comment for each…

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Gre+IpSec
Cisco

[Networking – LAB] Simple GRE Tunnel + IpSEC on Cisco router

  • stefano
  • Posted on 15th March 2015
  • No Comments

Today I was reviewing GRE tunnels and their interaction with IpSEC and I decided to create a very simple and small Lab in GNS3 to have a little bit of…

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Stefano’s Blog

about me

I love to communicate and to share my knowledge following the examples of Free Software and Open Source communities. In this blog I talk about technologies I play with and experiences with GNU/Linux, Networking (Cisco as first), new technologies and much more. I have technical and management experience with Networking, Security (Cisco, Juniper, Palo Alto, Pulse Secure) as well as GNU/Linux. I can help your Company growing and making changes and impacts in IT thanks to my work experience in the field with big enterprises. Contact me now for a free discussion!

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My Twitter Feed

Stefano LaguardiaFollow

Avatar
8 Jan

Hey @LogitechG, do you have control quality over official warranty claims? I have an almost new MX2s mouse where the scroll is blocked to freewheel only (very annoying) and "https://t.co/7NWdjvuRp8" told me "no issue" sending me back a non working mouse!

Reply on Twitter 1347591412284608513Retweet on Twitter 13475914122846085131Like on Twitter 13475914122846085131
Retweet on TwitterStefano Laguardia Retweeted
6 Jan

#ETH #Giveaway
To join giveaway:
1. Follow me
2. Retweet this post
3. Like it
I will be giving in total 1 ETH in following order:
1. winner gets 0,5 ETH
2. 0,25 ETH
3. 0,15 ETH
4. 0,1 ETH
Down description
#Crypto

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Retweet on TwitterStefano Laguardia Retweeted
18 Dec

Hotfix 20.7.7_1 is now live. HTTP redirect is automatically fixed after update.

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Retweet on TwitterStefano Laguardia Retweeted
18 Dec

For users having issues with admin GUI on HTTP please issue the following on the console to work around it for now:

# opnsense-revert -r 20.7.6 lighttpd && configctl webgui restart

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9 Dec

Questo:

Fabrizio Carimati@Clodo76

Dio ma perché una App?
Che cazzo di evoluzione dell'internette è se per ogni roba ci vuole un'App al posto di una pagina HTML? Madò https://t.co/MAee7NTv3o

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