Category Archives: Linux


usage: passbox [action]

Passbox – command line password manager utility


add-field Update an existing entry to add additional fields to
delete Remove an entry from the password database
get Get a particular password entry by it’s name
generate Generate a new random password
new Prompt to create a new passbox entry
remove-field Update an existing entry to remove additional fields
search Search the password database for a particular string, returns all matching entries
update Update an existing entry in the password database

Xcompile RPI Kernel on Debian

Building an RPI 3.6.11 kernel with PPS support on GPIO pin 24.

Straight forward instructions with no BS and no fancy crap.

PSA: To people writing how-to’s, keep your shiny Linux CLI kung-fu on your resume and off your blog.

If you are interested in compiling a custom kernel for other reasons just skip/replace the PPS specific junk below.

Install Debian.

Add Emdebian to sources.list:

# Xcompile Toolchain
deb squeeze main

Install the packages we need:

apt-get install emdebian-archive-keyring
apt-get install gcc-4.4-arm-linux-gnueabi

Create directories for your build:

mkdir /admin
mount /admin

Email Server Attack

Type: Brute Force
Protocol: POP3
OS: Linux 3.6.11+ armv6l
Platform: Pi Rev. B
Memory: 512M
Daemon: Dovecot 2.1.7-7
Backend Daemon: MySQL 5.5
Backend OS: Linux 2.6.32-5-amd64
Backend Platform: Generic AMD A4-3400 APU Dual Core
Backend Memory: 3.5G
Total Attempts: 13356
Avg. Attempt/s: 2.71

Postmortem: was *unable* to successfully authenticate to any valid user.
Attack was mitigated at the firewall (DROP). was contacted about this event.

Debian Jumbo Frames

2 NAS servers both with 802.3ad bonded gigE nics based on the Realtek 8169 chip.
The highest MTU I could set was 7000 even though the D-Link DGS-1210-24 Rev. A switch can support up to 10k.

Below is just a single sample, but all tests stayed within 57x Mbits for MTU=1500 and 77xMbits for MTU=7000.

The important bits.
iperf was used for this testing.

MTU 1500:
[ 3] 0.0-10.0 sec 687 MBytes 576 Mbits/sec

MTU 7000:
[ 3] 0.0-10.0 sec 926 MBytes 777 Mbits/sec