Live digital threats

I wanted to bring these free tools to my blog to keep track of them, as most probably I will forget about, and to share with anybody interested in gathering information in the security areas.

First tool was revealed to my in tweet from Greg Ferro:

https://twitter.com/etherealmind/status/392606499044098049

As usually I trust his words, I said to give it a try. I can tell that this tool is very interesting. According to the explanation found on http://www.digitalattackmap.com/faq/ :

The Digital Attack Map presents data gathered and published by Arbor Networks ATLAS® global threat intelligence system. ATLAS sources its data worldwide from 270+ ISP customers who have agreed to share anonymous network traffic and attack statistics. Data is updated hourly and can also be found in Arbor’s ATLAS Threat Portal.

Below you have an embedded version of this map, but better access the Digital Attack Map website.

Second tool caught my attention from the Digital Attack Map explanation and it’s called Arbor’s ATLAS Threat Portal.

Atlat Threat Portal

This tool is explained as:

The ATLAS portal today is a public resource that delivers a sub-set of the intelligence derived from the ATLAS sensor network on host/port scanning activity, zero-day exploits and worm propagation, security events, vulnerability disclosures and dynamic botnet and phishing infrastructures.

If the first tool is related to network attacks, the second one is covering more topics like botnets, phishing, scans and more.
You can access Arbor’s ATLAS Threat Portal here.


Packet header graphic representation

I was surfing the Internet in search of some good drawing representing packet header and I come across five excellent diagrams large enough ( 1050px wide ) to use digital but also for printing. The person behind these excellent drawings is Matt Baxter, but his site (fatpipe.org) is not accessible anymore. I found these documents on the Internet and I thought to add them here together.

You will find a link at the bottom of this post where you can download them all together.

Disclaimer: These drawings are not mine and I don’t claim any rights on them. My thanks and all copyrights go to Matt Baxter.
Matt, if you come across this blog and you find sharing to be inappropriate, please contact me.

IPv4 Header

IPv4 Header

IPv6 Header

IPv6 Header

TCP Header

TCP Header

UDP Header

UDP Heater

ICMP Header

ICMP Header

Download all drawings here:

Packet header representation

 

Draw network diagrams online (with Cisco stencils)

I’m a Mac and Linux user and if you are like me, then you have the same problems drawing network diagrams. Microsoft Visio does not have a version for this platforms. I’m not saying that there are no alternatives to Visio on Mac or Linux platform, but most of them are either limited in features, expensive or need some tricks to use it (as I described in one of my early post).

Finally I’ve found something that is:
– accessible (free or paid, but decent prices)
– online
– allow me to use Cisco stencils (not all, but at least a decent set of them)
– import / export Visio .vdx files (for paid version; I would like to have it for free or for Personal plan, but they have to make some money, isn’t it?)
– allow me to save the work in .pdf, .png or .jpeg format

The application is brought by LucidChart.com. I’ve found some other applications online, but I consider this to be the best so far.
I’m using the free version for now, but I’m thinking to buy paid account, especially for the Visio import / export features. As said above the prices are decent:

Pricing and Account Types LucidChart

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LucidChart.com may be used for more than just network diagrams, but I’m writing about this kind of drawing as is the most important for me now. Since a picture worth a thousand words, here is a small screencast that I made to show you how it works. No words (I don’t like how my recorded voice sounds) but you can see how a new network diagram is created from start to the point where I can save and use it outside LucidChart.com

P.S. I’m not affiliated in any way to LucidChart.com, the links are not part of any affiliate program and I’m not paid to write this post! I just want to share with you something that I find useful for network engineers.

[adsense_id=”4″]

Cisco QoS at-a-glance

Stephan, a  colleague of mine,  found the following documents digging through multiple pages of Cisco.com. The documents present a nice view of different QoS approaches and the most  important information. Somehow like “cheatsheets”. They were helpful to us when need to implement QoS in some parts of the network that we administer. I hope they will help you as well.

Maybe you’re wondering why I’m adding them here, since the documents are already somewhere in Cisco.com. As you probably know, Cisco has constantly changing their website in the last months and a lot of documentation is misplaced in the Cisco.com sitemap. We already had problems finding all links, so I said why not share it here as they are already public made by Cisco.

You’ll find a Download button under each document, for PDF version and at the end of this post there is a Link to download all documents in an archive. If somebody needs only one document and has a poor Internet connection why to force them to download the full archive.

Cisco's Campus QoS Design
Cisco – Campus QoS Design

Cisco's Branch QoS Design
Cisco – Branch QoS Design

Cisco IPv6 QoS

Cisco – IPv6 QoS

 Cisco's QoS Best Practices

Cisco – QoS Best Practices

Cisco QoS Design for IPsec VPNs

Cisco – QoS Design for IPsec VPNs

Cisco's QoS Design For MPLS VPN Service Providers

Cisco – QoS Design for MPLS VPN Service Providers

QoS Strategy for DoS Worm Attack Mitigation

Cisco – Scavenger class – QoS Strategy for DoS Worm Attack

Cisco's QoS Design for MPLS VPN Subscribers

Cisco – QoS Design for MPLS VPN Subscribers

QoS Baseline

Cisco – QoS-Baseline

Cisco's WAN QoS Design

Cisco – WAN QoS Design

As said in the beginning, if you’d prefer, you download all QoS graphs in one archive.

Let me know your opinions on the above approach on QoS from Cisco. Is is accurate? Do you apply them in your organization weather for Campus, WAN, VPN or even Security?

Etherape – Real time network topology and traffic flow

490153 500 375There are numerous reasons why you would want to watch your network topology or the flow of traffic on your network. Say you are experiencing a bandwidth bottleneck. What is causing that bottleneck? Is it a particular user? A machine gone awry? How do you find out what is happening without having to walk around to every single machine on your network? Easy. The Etherape network monitor gives you a real-time graphical display of your network and the flow of traffic. Using this tool you can easily pinpoint suspect machines. Let’s take a look at exactly how you can use this tool to troubleshoot networking issues.

Installation

Etherape is only available for UNIX and UNIX-like OSs (such as Linux and even OS X). In order to use Etherape you will need:

  • libpcap
  • GTK+
  • Libglade 2
  • GNOME
  • Standard resolver library (name depends upon OS)

Read more here…