Josep Escobar Navarro
Developer

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Como detectar intrusos en tu red WiFi con Nmap

Si te preocupa la seguridad de tu red WiFi, y aun habiendo aplicado todas las protecciones habituales y existentes, te preocupa que alguien pueda acceder a ella, en esta guía verás como detectar posibles intrusos en tu red WiFi utilizando la aplicación Nmap.

Nmap es una aplicación multiplataforma y de código abierto, que permite realizar una gran variedad de tareas relacionadas con el análisis de una red. Posiblemente el uso más común por el que se conoce Nmap es el rastreo de puertos de un dispositivo cliente, pero se puede utilizar para multitud de propósitos.

Uno de los propósitos para los que se puede usar es justamente para escanear una red interna y comprobar el numero de clientes conectados a ella. Pues bien, si posees una red WiFi privada, indirectamente esto te puede permitir conocer si hay un intruso conectado a ella. - Read More -

Ext3 en OS X: Leer y escribir

Entrada rápida para no olvidar lo que me ha costado días encontrar.

Si necesitas acceder a un disco duro con particiones en formato ext2 o ext3 (típicos de GNU/Linux) necesitarás:

Crear una carpeta para la particion en /Volumes:

sudo mkdir /Volumes/midisco

Montar la partición (puedes ver cómo se llama con disktool -l)

sudo /usr/local/bin/fuse-ext2 /dev/nombredeldisco /Volumes/midisco/ -o force

Si como a mi esto os lo montaba y no os dejaba escribir, tendréis que modificar un archivo de fuse-ext2, por lo que lo abrimos con un editor de textos y buscamos la función Mount().

sudo vim /System/Library/Filesystems/fuse-ext2.fs/fuse-ext2.util

La función Mount() debería tener lo siguiente:

OPTIONS="auto_xattr,defer_permissions,rw+"

Expulsad y volved a montar el disco.

rasp

How to install piBang on Raspberry Pi

Raspberry-Pi-Logo

I loaded up pibang linux the other day. The process was very simple.  Download the image from here.

After its downloaded just use gzip to unzip it.

~ gzip -d pibang-openbox-20130411.img.zip

burn it to an SD card ( this assumes your SD card is sdb).

 

~ sudo dd if=PiBang_20130411.img of=/dev/sdb bs=512k

Stick that SD card in your raspberry pi and boot it up and go through the menu system to setup your user account, root password, expand the partition to use the entire SD card and overo clock your raspberry pi if you so choose.

once you reboot into the OS and log in and start up X windows you will have another script that will update you to current and give you other install options. The entire experience is simple and pleasant.

you will be up and running in no time.

PiBang is really fast on the raspberry pi board, especially so if you over clock your pi. I personally chose the medium setting. The CPU frequency floats between 700 and 900 Mhz as needed. The crunch# interface is clean and quick which make it an excellent option for a raspberry pi install. I have added a few desktop screenshots for those who like those sort of images…

OSX: How to mount a volume as read-only

In some cases a volume will fail to mount even though it is a valid volume. If you are unable to repair the volume with Disk Utility, you should try to mount it (make it available) as read-only in order to recover data from it. To mount a volume as read-only, follow these steps.

  1. Open Terminal (/Applications/Utilities/Terminal) and execute this command: diskutil list

Find the name of the volume that doesn’t mount in the output, such as this:

MacBook-Pro-de-Josep-Escobar:~ josepescobar$ diskutil list

/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *121.3 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 120.5 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3

/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk1
1: EFI 209.7 MB disk1s1
2: Apple_HFS Macintosh HD 391.9 GB disk1s2
3: Linux Swap 3.9 GB disk1s3
4: Microsoft Basic Data UNTITLED 24.5 GB disk1s4

In this example, we’ll use the volume “Drive80″. Drive80 exists on disk1 on slice 3 in the above output, so the full device name is /dev/disk1s3.

  1. Make a directory with the name of the drive in /Volumes by executing this command in Terminal: mkdir /Volumes/MacBookAir You’ll want to substitute the name of your hard drive for “MacBookAir“.
  2. Mount the device as read-only by issuing the following command in Terminal: sudo mount -t hfs -o rdonly /dev/disk0s2 /Volumes/MacBookAir/ Again, substitute the name of your hard drive for “MacBookAir“.
  3. If the volume doesn’t appear in the Finder, execute this command in Terminal: disktool -r.

If these steps are successful, it may be possible to retrieve or back up data from the volume. When all possible data is recovered the drive should be erased.