Fix it Felix Jr.! Security network edition!

--Originally published at (Not so) Random talk

Wrecking stuff have always been Ralph’s thing. Ever since his tree stump was moved to the dumpster, he had dedicated himself to wreck the building that was built in his old place. But, whenever Wrack starts wrecking, Felix Jr. has always been there to fix things, thankfully. With his useful hammer, he always fixes the windows and reconstructs the zones Ralph has broken with his big fists. And time and time again, our hero manages to fix everything, get a golden medal, and leave the villain in the mud.

Resultado de imagen para fix it felix!

However, times change. And just when Ralph was resigning himself, some interesting trash got into the dumpster. It was lot of information about networking that the Highlanders decided wasn’t important when setting their new networks. And with it, Ralph also learned how to attack this new thing called network. Yes, Wreck it Ralph is now Wrecking the Network! Now in a hurry, Felix had to learn about security networks and dive into the practice of protecting the usability and integrity of your network and data of the Highlanders. Set into this new adventure with Felix, and fix all the things that Ralph has damaged as well as setting up the new multiple layers of defenses on the network.

Imagen relacionada

The way of playing in this game is somewhat different that in the other installment. In each level, you must ensure or do activities that conform network security. Earn a certain number of points to advance to the next level. These activities are:

Wireless Security: set up the wireless security for the Highlanders network, which they used to have on default and Its probably one of the ways in which Ralph accessed the network. To do so in a basic level, change the passwords on the modems of the Highlanders.

Network isolation: divide

Resultado de imagen para honeypot
Imagen relacionada
Continue reading "Fix it Felix Jr.! Security network edition!"

Fashion Security Runway: Architecture Models

--Originally published at (Not so) Random talk


Today, coming down our runway are the security architectures, showing us their models. Show your enthusiasm and let’s begin!

*cue sassy music in*


The first model is State Machine. It is using states to verify the security of a system, capturing all the current permissions and instances of subjects accessing objects. Getting the job done, it is dealing with each subject’s association with objects. If the subjects can only access objects by means that are concurrent with the security policy, the system is secure. To alter a state, a transition (activity) must happen, though if all activities do not comprise the system and put It into an insecure state, then the system executes a secure state machine model. If a secure state fails, safety measures like a reboot or system freeze must happen in order to protect the system, itself, and data.  As you can see, this is a very basic attire.



And just as we were saying this, the next Bell-LaPadula model indeed takes the prior basic attire and modifies it into its own style. It is a multilevel security style, with users of different clearences using the system and the system process data with different classifications, and it is an implementation of its predecessor that enforces confidentiality aspects in access control. Its’ goal? Enforce secrets and prevent data leakage.  A matrix and security levels are used to determine if subjects can access different objects. The subject’s clearance is compared to the object’s classification; if the clearance is higher or equal to the object’s classification, the subject can access the object without violating the security policy. If properly implemented and enforced, this model has been mathematically proven to prevent data from a higher security level from flowing to a lower security level. It is an information flow

Resultado de imagen para biba model
Continue reading "Fashion Security Runway: Architecture Models"