How does the internet work - We know what is networking
Cisco device will not send log messages to your terminal session by default. That means that you will see log messages in putty only if you are connected to console port but if you connect with telnet or SSH you will not get log messages. Here’s how to resolve this: There are three types of logging: […]
When I connect to device with telnet or SSH I don’t see logging?
This post represents the solution and explanation for quiz-2.
It shows one of the common problems, solutions and recommendations when implementing MSTP.
Just a few days ago we learned about an incident involving a mis-issued SSL certificate that was used in a Man in the Middle attack to intercept Gmail data. In this blog post we’ll talk about how Man in the Middle (MITM) attacks work and we’ll look at recent BGP MITM event that caused traffic for some major networks such as Microsoft and Facebook to be redirected to an ISP in France.
Certificate authorities and SSL
Just as the DigiNotar storm seemed to have calmed down, Google announced they discovered, yet another Certificate Authority that was involved in a similar incident. TURKTRUST, a certificate authority, mis-issued two intermediate certificates that were later used to intercept SSL traffic to Gmail. In cases like this the attacker is interested in intercepting communication between Gmail users and the Gmail servers. In order to successfully execute such an attack the attacker will need to insert his fake Gmail impersonating webserver between the user and the actual Gmail servers, this is what we call a Man in the Middle Attack, sometimes referred to as MITM.
The challenge here is: how do you get the user to send traffic to your fake server instead of to the Continue reading
How does the internet work - We know what is networking
Stateless autoconfiguration or SLAAC SLAAC is another method in which the host or router interface is assigned a 64-bit prefix, and then the last 64 bits of its address are derived by the host or router with help of EUI-64 process which is described here. SLAAC uses NDP protocol to work. As the format of the EUI-64 format […]
I have received a request for help on manual installation of phpIPAM on debian linux, so I decided to write a small how-to if anyone else has problems or is not so familiar with linux distributions and environment. I have used fresh default debian 6.0 as distribution because it is widely used, I believe on ubuntu linux procedure should be very similar, except maybe for locations of some config files.
I have used the following settings for installation:
If you already have MySQL/apache set you can skip point 3.
Installation procedure:
Update your sources (apt-get update) and install Apache, php and mysql server:
apt-get install apache2 mysql-server php5 php5-gmp php-pear php5-mysql php5-ldap
After all is installed and the apache server is running, you need to decide weather you will be running it under vhost or in subdirectory or root directory. For this guide I will have it in subdirectory http://server/phpipam/, so do the following:
cd /var/www/
wget http://freefr.dl.sourceforge.net/project/phpipam/phpipam-1. Continue reading
Happy new year to you all! I truly hope that all your dreams for 2013 may come true and maybe even more.
For the first time I didn’t really made a to-do list for 2013, but in my head I’m still working on things I want to have accomplished by the end of the year. I wanted to discuss in short a few of those topics.
Just at the end of December I bought a house in Utrecht, Netherlands. This is going to fill up a lot of time for me in 2013, where I literally need to buy everything and arrange a lot of things.
Of course the fun part of designing my home network, automating my house as much as possible and designing my little office if already in progress :)
The CCIE Data Center is also taking up a lot of time in 2013. Besides that I’m studying to pursue the title myself. I’m also writing the CCIE Data Center Lab Workbook for IPexpert. This is an amazing opportunity and I really love to work on it. I really hope you like using it when you purchase. Otherwise I’m more than happy to Continue reading
This post represents the solution and explanation for quiz-1.
It shows one of the common problems, solutions and recommendations when implementing MSTP.
How does the internet work - We know what is networking
L2TP Attributes Summary Projected L2TP standard was made available in the year 1999 by means of RFC 2661. It was originated primarily from two different tunneling protocols, named as: Point-to-Point communication protocol and PPTP (Point to Point Tunneling protocol). In other words, L2TP (Layer 2 Tunnel Protocol) is an up-and-coming IETF (Internet Engineering Task Force) […]
I installed OmniOS on my home filer over the Christmas break. Jumping from a Solaris Nevada build to OmniOS meant figuring out what software packages are available in the OmniOS repositories, what third-party repos are available and what software I would have to compile by hand. Given that this machine is only acting as a filer and isn't running any other services to speak of, the list of software to get up and running is small; however a critical component is apcupsd which talks to the Uninterruptible Power Supply (UPS) and cleanly powers down the filer if the power goes out for an extended time.
The hangup for me is that my UPS connects to the filer via USB, not a serial connection. It took me some hours to figure out how to get apcupsd installed with USB support. Here's how.