Recently I went to the Computer Sciences Department of the University of PR – Rio Piedras Campus and had a great time with the students talking about pivoting networks. I decided to share it with you … hope you enjoy it.
Recently I was asked to give some administrative personnel the ability to reset, unlock and change passwords. To which I said: HELL NO!, but since this was not my decision to make and it was my task to complete I had to come up with a solution. So I had to give these muggles access but have the ability to audit what they were doing.
… so that is how this post came to be.
Continue reading How to delegate and audit password changes on a Domain
Recently a friend asked about wiping data from a hard disk. You see, he works at a hospital and he has to dispose of some hard disk so to be on the safe side he wanted to wipe them clean.
Continue reading Wiping/scrubbig data from a disk
Recently I presented at an ISSA meeting and some people wanted to know about my setup.
Well; here it is:
Continue reading BYOD: Bring your own Darkside … about my setup
How to add a user in Windows CLI and hide it!
This can become a time saver for sysadmins and security professionals
We are assuming you have privileges on the machine to add users/groups. It’s real easy, just use the net command to add users and groups to the machine:
Continue reading How to add a user in Windows CLI and hide it!
In our last meeting of Init6 security group I presented an introduction for those people who want to become security pros and lack the skills using Linux. Of course this is basic stuff but I hope it helps.
Nuevamente estoy aquí repasando mis temas sobre Linux y este en particular es muy interesante para mí, ya que envuelve la seguridad de nuestros datos. El tema es cifrado de volúmenes (volume encryption).
Continue reading Como cifrar volumenes en Linux (Encrypting Volumes)
First of all, you should never modify the default policies in any windows environment (Workstation, Stand alone, Member server or DC), the right way to do it is to create polices based on what ever you want to achievied and link those policies to the appropiate OU. For example: Desktop Control, User Station settings, Base Security Settings, Network Settings, Internet Control, etc. Well you get the idea, use your imagination and keep it simple but don’t go over board creating one gpo for every setting you want to change.
BUT, if you did not know better, or inherited a windows system from another administrator, you probably have modifications made to the default policies. Or maybe, it’s broken!
Continue reading How to restore/fix the default Domain Policies in Windows Server
Saludos a to@s,
Me encuentro estudiando para la certificación RHCSA y en este momento estoy trabajando con lo que son volúmenes físicos (physical volumes) , grupos de volúmenes (volume groups) y volúmenes lógicos (logical volumes). Asi que aprovecharé y compartiré con ustedes el tema. Básicamente el concepto de volúmenes es utilizado par poder ajustar el tamaño de las “particiones” de forma dinámica sin afectar el sistema de archivos en la instalación corriente.
Esto seria lo equivalente a discos dinámicos y volúmenes expansivos (spanned volumes) en Windows. Debo indicar que al igual que Windows este sistema NO provee tolerancia a fallas y solo atiende la problemática del espacio.