This week I’m attending an HP training in Milan The course topics aren’t as challenging as I’ve expected but I had the opportunity to test focus on some interoperability problems that may occur in mixed environments, especially with Cisco and non-Cisco devices, like…

A great blog and Youtube channel with a lot of resources for Cisco Wireless:…

When a router config is saved with copy run start IOS asks for a destination filename: RTR#copy running-config startup-config Destination filename [startup-config]? Building configuration..…

[youtube]http://www.youtube.com/watch?v=6UJZBeK_JCs&feature=youtu[... ](https://www.ifconfig.it/hugo/post/cisco-catalyst-3560-and-3750-qos-simplified-seriously-by-kevin-wallace/)

OSPF Forward Address (FA): works like BGP next-hop for OSPF external routes advertised only if next-hop is on a not-passive and multiaccess interface if there’s not a route to FA address, route is not installed FA = 0.0.0.0 -> cost to ABR FA <> 0.0.0…

And one more blog post by me! It’s going to be in brand new topic than the others. For about an year and a half I’ve got an idea which I wanted to accomplish…To create my own simple programming language. Actually it’s very useful task and quite interesting…

Since HTML5 became wide supported the most popular aspects I hear about were it’s canvas, WebSockets and localStorage. I’ve got very close experience with the first two of the mentioned but the localStorage was somehow unknown for me since a month. I’ve researched the topic…

After the first week of the INE bootcamp I spent the weekend relaxing a bit and reviewing the topics on the doc-cd…

There are a lot of interesting things in the syntax of JavaScript, one of which is the definition of self-executing (self-invoking) functions…

My coworkers at Fred Hutchinson regularly use the development version of R (i.e., R-devel) and have urged me to do the same…

I spent this week in London attending the first part INE CCIE R&S 10days bootcamp with Brian Dennis…

It seems that it’s common a problem to setup Ubuntu on the new Asus N56VZ so I decided to create an English version of my post. I was struggling with three issues about two weeks…

Today is system administrator appreciation day. Don’t forget to show your appreciation to youy SysAdmin (on Network Admin).…

Един пост на български, защото мисля, че ще бъде по-полезен. Доста време се тормозя с подкарването на разни feature-и на новия ми Asus N56 с Ubuntu 12.04 x86-64…Мултимедия бутоните (комбинация между Fn+F*), съббуфера, като имах известни проблеми (не особени, но все пак трябва да се отбележат) и с ethernet…

I’m here again, after a long pause. For a while I’ve got problems with my health and I’m nailed at home…so I’ve go a lot of free time. Last night I’ve decided to root my Google Nexus S. I use Ubuntu 12.04 on my home machine so I put on it Oracle Java and Android SDK…

This time is for real…

A nice and free manual to manage Debian: Accessible to all, this book teaches the essentials to anyone who wants to become an effective and independent Debian GNU/Linux administrator.…

Today a customer called to change the IP address of a L2L VPN peer on his Cisco ASA 8.3(2)4. The task can be divided in 3 steps: 1) Get the VPN password. It should be written somewhere in the network documentation, as stated by rule 7, but you know, password sometimes just get lost. 2) Find and update crypto map asa# sh run | b peer 1.1.1…

As a network engineer I deal with digital certificates quite often for EAP-TLS authentication, VPN, and device certificates like on WLC controllers. Customers that don’t need a public certificate just want a valid certificate loaded on the device to make it work…

Sometimes customers ask me how they can get provider independent IP addresses. Since IPv4 are finished, I looked for IPv6 only. To apply for Provider Independent addresses there are some Contractual Requirements that must be met. It’s cleat that IP are assigned to the organization and can’t be assigned to third parties, i.e…

tcping.exe is a small console application that operates similarly to ‘ping’, however it works over a tcp port. License: GPL - Platforms: Win XP, Vista 7 When I have to test if a TCP connection works, like when configuring a NAT or ACL rule, usually I telnet the specific port…

Tomahawk is a command line tool for testing network-based intrusion prevention systems (NIPS). The concept is simple, you can download virus,attacks,exploit pcaps from many sources and save them on the Tomahawk machine…

As you see HTML5 is everywhere (of course I exclude IE…or just before version 10). Web site used for quick image composition or edition is something very useful for the “modern web person”. There are few such services. Most of them use Flash. Nothing against it but…it’s too heavy for me…unnecessarily heavy…

Tool of the day: Batch Compiler

Passed Brocade 150-220 exam, another badge added to my c.v. Having a CCNP background and some CCIE theory knowledge I found this exam quite easy.On the exam blueprint just some QoS implementations, VRRP-E and Metro Ring Protocol are different than Cisco exams…

Sometimes it can be useful to copy files to and from a Cisco ASA Firewall via SCP…

Forgot the PSK of a VPN on a Cisco ASA? With this command you can see all the passwords in clear: more…

On a customer’s network we noticed that the Internet facing router reboots because of a software error. We stumbled on this issue by chance, just because one of the reboots was during a videoconference…

Тъй като съм вече студент 3-ти курс във ФМИ и курсовите проекти се натрупаха, мисля че мога да бъда полезен на “младото поколение ФМИ-исти”, като предоставя една страница с връзки към кода, който съм разработил…

Ping is one of the most useful tools to test network connectivity, sometimes it is the first step for troubleshooting and getting the “!” (if you work on Cisco devices) can be a big satisfaction…

Inspired by the Packet Pushers Podcast I setup my personal IPv6 tunnel to TunnelBroker.net. Registration is free and the configuration is straightforward. The first step is the registration and setup of a tunnel to our IPv4 address…

And one post in English…For few days I’m developing one jQuery UI plugin. It’s picture gallery which I’ve seen in flash but not in JavaScript, that’s why I decided to fix this. The gallery is a set of rotating pictures and difference ways of handling the perspective…

В потребителската група SofiaJS последните няколко месеца се случиха доста интересни неща, а на мен все не ми остава време, за да блогна за тях..…

“You can either do a planned, careful migration, or you can do it in a panic, and you should know full well that panicking is more expensive…

Inspired by the CodeAcademy project, I’ve decided to learn a programming language this year. Back in high school I’ve learnt Pascal, Delphi, Assembly and C but many years passed so I forgot all the sintax but not the basics…

Remember: voice Vlan is not automatically created when applied to a port…

Number 8 is the one I mention when I see a network project made with PowerPoint that looks simple with all those clouds and arrows: (8) It is more complicated than you think…

Hi! I haven’t wrote since a long time but there’s so much code and so little time…It’s bad that the biggest part of the code is not open source but what can we do…Last few hours I developed a JavaScript plugin for color animation…

A customer called today for a strange issue on their Cisco ASA. They have 60Mbit internet connection and a big event is filling the bandwidth. The session graph is what they are worried about: This is a perfect example of TCP Sync, well explained HERE…

Glogg is a tool to browse and search through text files. I find it very useful to search in log files, it’s light and fast. It can also “follow” a file, so there’s no need to reopen the file or refresh if something changes…

Quite often when a network configuration includes authentication or 802.1x on network devices Radius is the protocol of choice. NtRadPing is a free utility to test a Radius server…

HP allows Cisco certified people to achieve it’s MASE/ASE certs using Fast Track: While HP certifications aren’t as popular as Cisco’s they can be a way to learn a different platform and increase career opportunities…

Today I passed Cisco 642-983 DCUCI exam and it was a surprise to see two certifications on my Cisco curriculum: Cisco Unified Computing Technology Support Specialist and Cisco Data Center Support for UC Specialist The next step would be “Cisco Data Center Unified Computing Support Specialist” but since VCP is a requirement and is not in my plans I have to skip that…

Given that there are almost 13 million views of Steve Jobs’ commencement address, I am certain that I missed this video when it went viral…

This week I’m attending Cisco DCUCI course in Milan…

Earlier, I found an interesting post from Bo Allen on pseudo-random vs random numbers, where the author uses a simple bitmap (heat map) to show that the rand function in PHP has a systematic pattern and compares these to truly random numbers obtained from random.org…

Today I passed this Cisco exam: (642-647) Deploying Cisco ASA VPN Solutions v1.0 (VPN) and my CCSP certification is now updated to the new CCNP(Security). I’ve prepared the exam on the Cisco Press Official Cert Guide…

Преди няколко месеца внезапно (както май често става) започнах да мисля за програмиране (как ли така…) и най-вече за JavaScript…

Few days ago I was creating a system in which it was necessary to implement a sound notification feature…

Тази сутрин пуснах прословутата f8…Бях с големи очаквания (дори поствах за нея), може би заради слабата ми информираност очаквах нещо като Google I/O (има си Google…защо не потърсих предварително…)…

Като всеки любознателен developer и аз се включих към хората, които искат да получат mail от Google при пускането на API за Google+. Вчера (15-ти септември) около 1 часа получих следния mail: Getting Started on the Google+ API Greetings developers, Thank you for showing your interest in the Google+ platform on our developer interest form…

Before years I was writing all the code by my own, without additional libraries (including jQuery). For beginner developer it’s a good strategy. When you use $.ajax it’s all that easy: }); But you can’t get the main idea. Many developers don’t have an idea how to write this without a library…

That’s my second post here and the first one which is going to have any sense. Today a friend of mine was fighting with Google’s blog system…He was posting some data with images in it…

Hey, That’s my first blog here. I’ll try to put some interesting stuff about the Life, Universe and Everything else but mostly I think…about some technical topics. I hope that you’re going to find interesting and useful information. Have a nice read :)…

I didn’t pass the CCIE R&S Lab exam today in Brussels. This was my first attempt. I have to improve my troubleshooting skills and go deeper in some technologies but I think I can do it. I don’t have plans for the next attempt yet, there’re other personal projects that will take most of my free time in the next months…

Occasionally, I will query Google with “statistics conferences”, “machine learning conferences” or “pattern recognition conferences” and the like. But often, it is difficult to obtain anything meaningful other than the conferences of which I’m already aware (such as JSM, ICML, some IEEE conferences). Today, I found WikiCFP, which is a A Wiki for Calls for Papers…

Before we begin, here’s a YouTube video demonstrating Conway’s Game of Life in R: In undergrad I had a computer science professor that piqued my interest in applied mathematics, beginning with Conway’s Game of Life…

With all of the discussions (hype?) regarding applied statistics, machine learning, and data science, I have been looking for a go-to source of data unrelated to my day-to-day work. I loved baseball as a kid. I love baseball now…

Yesterday we finished another exceptional 14 hours of medicine, complete with regenerative biology, cutting edge neuroscience, a trip to go play with da Vinci surgical robots and a paranoia-inducing talk on how the future of synthetic biology will present tremendous challenges and opportunities for the world…

We’ve just wrapped up day three and FutureMed is quickly joining the club of highest quality conferences we’ve attended…

Day two of FutureMed was just about as dense (8am – 10pm) as day one, with the morning dedicated to the future of personalized medicine, the afternoon to a visit to Kaiser’s Garfield Innovation Center, and then the post-dinner lectures on integrative medicine. On the whole it was a wonderfully inspiring day full of mind-blowing medical advances…

Dear Readers,

We’ve been experiencing technical difficulties while upgrading Medgadget. We had to roll back a couple of days, but are working on fixing the bugs and getting back to business. We apologize for any inconvenience and hope you stay with us as we try to get through this…

We’re here at Singularity University’s FutureMed after a dense day of exploring mind-melding medical advances…

Abbott has received CE approval for its FreeStyle InsuLinx Blood Glucose Monitoring System, which, in addition to measuring blood glucose, calculates suggested insulin doses. Calculating appropriate mealtime insulin doses based on blood glucose level and carbohydrate intake can be a challenging task for some patients…

Traditional tuberculosis testing can take days to return a result, and, while newer PCR tests can deliver results in a matter of hours, they are much more expensive…

Bioness out of Valencia, California has received U.S. FDA approval for its NESS L300 Plus System, a combination of the NESS L300 Foot Drop System with a thigh stimulation device…

Researchers from Columbia Engineering School developed a new method to non-invasively map the electrical activation of the heart. The technique, called Electromechanical Wave Imaging (EWI), uses ultrasound waves to detect very small deformations following the electrical activation of the heart…

Futuremed kicked off this morning at NASA’s Ames Research Park and all the attendees will be getting copies of Thinklabs Medical’s iMurmur 2 and Heart Record apps for iPhone and iPad…

Warning: don’t read the following if you’ve recently dined on pig! A new program developed by the UK’s Institute of Food Research, the US Department of Agriculture, and Australia’s Food Safety Centre seeks to predict the amount of Salmonella present on different levels of the pork supply…

Sanofi won FDA approval for Fluzone Intradermal flu vaccine system. Indicated for ages 18 through 64, the system uses a microinjection needle to deliver the vaccine into the dermis…

Researchers from the University of Calgary have shown that doctors can make a stroke diagnosis using an iPhone application just as accurately (and faster) than they can on a traditional…

Ed Bullimore, a professor at the University of Cambridge, recently gave a talk to an audience of eager Britons about the amazing complexity of the brain…

Medtronic has received FDA regulatory approval to market a pair of left ventricle cardiac resynchronization leads…

A quick note about tcp small servers. DOC-CD says: “The TCP small servers consist of three services: Discard (port 9), Echo (port 7), and Chargen (port 19)…

Quick note on PPPoE address…

Thou shalt above all, maintain the integrity of the network. Thou shalt have a long term strategic direction. Thou shalt always opt for quality before expediency. Thou shalt meet the requirements, exceed the expectations and anticipate the needs of users. Thou shalt benefit from a successful implementation by careful project planning…

First of all: autoinstall works only on the first serial interface of the router, don’t forget it. This is the topology for the small lab: R1 is a TFTP server, it stores R3 configuration in flash…

Autoinstall is a quite interesting topic, it deserves some labbing. Start from the DOC-CD as usual, we focus on the LAN implementation first. You can find HERE the flowchart of the autoinstall process…

RMON is generally an easy task, can be tricky but usually on CCIE workbooks the task are fair. The hardest part for me is to find the MIB to monitor. This is the task: monitor interface Vlan1, send a trap if it receives more than 100 packets every 30 seconds, send a trap if it goes under 50 packets every 30 seconds…

Snmp v3 is described in many RFC, like RFC3414 and so on. History and security of the various SNMP versions are easy to find and well known, let’s focus on configuration…

Margaux 1.0 Après neuf mois de développement, de roadmap, de milestones, nous sommes enfin parvenus à une version 1.0 de Margaux ;-) Ma compagne et moi-même avons donc le grand plaisir de vous informer que notre superbe petite fille Margaux est née le 21 janvier 2011 à 3h26 pesant 3,270kg et mesurant 51cm…

How to keep track of logs of a Cisco router using OSX? Easy task! Enable syslog listener on OSX: instructions here add this line to /etc/syslog.conf local7.* /var/log/cisco.log enable logging on the router: logging facility local7 ! ip address of iMac logging 10.0.0.1 install the Syslog Widget and configure it to check file /var/log/cisco.log…

“Breaking stupid rules for smart results.” Not the best book ever but I liked the concept: don’t stick to the rules if you feel the rules don’t allows to work in and efficient way. Hacking work is actually intrapreneurship and requires a little anarchic spirit…