jrelo

Source material:
  http://security.stackexchange.com/questions/24444/what-is-the-most-hardened-set-of-options-for-gcc-compiling-c-c
  https://wiki.gentoo.org/wiki/Hardened_Gentoo
  https://wiki.debian.org/Hardening

================================================================================================================>
GCC Security related flags and options:

CFLAGS="-fPIE -fstack-protector-all -D_FORTIFY_SOURCE=2" 
LDFLAGS="-Wl,-z,now -Wl,-z,relro"

fikr4n

#!/usr/bin/python3
"""An interactive Python interpreter to play with GTK+ without blocking the console

Usage:
./pygigtk.py

You don't need to call 'Gtk.main' in the console, just start using Gtk, such as
creating a window and 'show_all' it. Gtk, GObject, etc have been imported.

Author: fikr4n <github.com/fikr4n>

lonetwin

import logging
import fcntl
from contextlib import contextmanager

@contextmanager
def locked_open(filename, mode='r'):
    """locked_open(filename, mode='r') -> <open file object>
    
       Context manager that on entry opens the path `filename`, using `mode`
       (default: `r`), and applies an advisory write lock on the file which

ypandit

[Unit]
Description=X Virtual Frame Buffer Service
After=network.target

[Service]
ExecStart=/usr/bin/Xvfb :99 -screen 0 1024x768x24

[Install]
WantedBy=multi-user.target

17twenty

For those of you who want to try out systemd-networkd, you can read on, and find out in this tutorial how to switch from NetworkManager to systemd-networkd on Linux.

Requirement systemd-networkd is available in systemd version 210 and higher. Check the version of your systemd before proceeding.

$ systemctl --version

Switch from Network Manager to Systemd-Networkd

It is relatively straightforward to switch from Network Manager to systemd-networkd (and vice versa).

uniqname

JS REPL

There's not a good, simple embeddable REPL for JS out there that I could find. I wanted one for presentations on JavaScript concepts. The developer tools' console would be ideal, but bailing out of my presentation and opening a console brakes the flow. Tools like codepen.io et al. are great, but more overhead and set up than I need. I just want to type JS and show the result. This is a decent first step for my needs.

A Pen by Cory on CodePen.

License.

apollolm

# the IP(s) on which your node server is running. I chose port 3000.
upstream app_geoforce {
    server 127.0.0.1:3000;
}

upstream app_pcodes{
    server 127.0.0.1:3001;
}

soarez

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

markjlorenz

Reverse Port Tunneling with EC2

Reverse port tunneling is used to give a user outside of a networks firewall accesst to a computer inside the firewall where direct SSH connections aren't allowed. It works by the in-firewall computer SSH'ing to a middleman computer that then forwards incomming SSH connections on a given port to the firewalled computer.

Setup the middleman

• Get an ubuntu EC2 instance
• Download it's security keys (both in-firewall and out-firewall computers will need the private key)
• Setup the security group to allow connections on port 10002
• SSH into the middleman and add: GatewayPorts yes to /etc/ssh/sshd_config

scarolan

<powershell>

# First we add our administrative user, replace username and password with your own
$computer=$env:ComputerName
$user="username"      ## Change this!
$password='password'  ## And change this too!
$objOu = [ADSI]"WinNT://$computer"
$objGroup = [ADSI]"WinNT://$computer/Administrators,group"
$objUser = $objOU.Create("User", $user)
$objUser.setpassword($password)