Raspberry Pi 3 B+ from The Pi Hut
In our SOC we use
Pi-hole to block network ad-serving domains. Benefits of Pi-hole are highlited on their web site
Since ads are blocked before they are downloaded, your network will perform better
Network-level blocking allows you to block ads in non-traditional places such as mobile apps and smart TVs, regardless of hardware or OS
Pi-hole works on Linux systems and for home usage is common to install it on a Raspberry Pi device.
This is my jurney into installing Pi-hole on my Raspberry Pi.
Continue reading “Raspberry Pi + Pi-hole: a perfect combo”
Synchronization by Taxydromos69
I already wrote
how to configure a basic High Availability Ubuntu cluster. The steps to setup a basic cluster are detailed in the previous post, so please read the post if you don’t know how to make the cluster up&running. Same conventions are used here.
One of the topic I didn’t covered on the old post was “
application replication/synchronization between the nodes“. Now it’s time to show you how to keep in sync files between cluster nodes, using DRBD software. DRBD is a powerful component of Linux kernel and is designed to keep in sync data via TCP/IP between nodes volumes. In this post we will setup a clustered freeradius service that sync /etc/freeradius/clients.conf file between nodes. Continue reading “Configure Linux High Availability Cluster in Ubuntu with Corosync and DRBD file sync”
Jellyfish Cluster – photo by robin on flickr
HA Cluster with DRBD file sync which adds file sync configuration between cluster nodes]
: tested the configuration also with UPDATED on March 7, 2017 Ubuntu 16.04 LTS]
This post show how to configure a basic High Availability cluster in Ubuntu using
Corosync (cluster manager) and Pacemaker (cluster resources manager) software available in Ubuntu repositories (tested on Ubuntu 14.04 and 16.04 LTS). More information regarding Linux HA can be found here.
The goal of this post is to setup a freeradius service in HA. To do this we use two
Ubuntu 14.04 or 16.04 LTS Server nodes, announcing a single virtual IP from the active cluster node. Notice that in this scenario each freeradius cluster istance is a standalone istance; I don’t cover application replication/synchronization between the nodes (rsync or shared disk via DRBD). Maybe I can do a new post in the future 🙂 [ ] I did the post Continue reading “Configure basic Linux High Availability Cluster in Ubuntu with Corosync”
Postfix email relay
OTRS Help Desk is an
open source application (with Enterprise support) that has a lot of useful features: ITSM, Surveys, Time Accounting and System monitoring.
I use it on my company as a Service Desk for
Security purposes (and more).
As you can read from our Success Story one of the feature we currently appreciate is the ability to track all the email exchanges into tickets simply putting ticket number in email Subject end CCing the proper configured email address. This allow us to interact with external parties without the need for other people to access our OTRS istance. Continue reading “Configure OTRS to process multiple Tickets in email Subject”
Lone Hacker in Wharehouse by Brian Klug
Security Onion is an Ubuntu based distribution created to handle a lot of Security task.
One of the security tool installed is
SNORT, the best open source Intrusion Detection System (IDS). Security Onion use Pulledpork to get IDS rules and process them.
I wrote a perl script to make advanced modification to the downloaded SNORT rules. This script can handle rule transformation based on regular expression and multiple substitution patterns.
Continue reading “SNORT rules Advanced Parser for pulledpork”
Network by Rosmarie Voegtli
[UPDATE Feb 24th 2018: tenable
disabled the API to execute remote scan since version 7 so keep in mind that if you use nessus>7 this won’t work]
Metasploit is my favorite tool while I do Pen Test and Secuirty Checks. I use also Nessus for Vulnerability Assessment and integrate Nessus and Metasploit is a must.
Follow a short guide on how to launch Nessus from Metasploit (for reference, I used NESSUS 6.5 and Metasploit PRO but also Community Edition should be ok).
Continue reading “Launching Nessus scans inside Metasploit”
Forward by Bruce Berrien
One of the problems I encountered in my job is to get syslog (udp/514) logs from a server that support only one syslog destination and resend these logs to two or more servers (log archiving, security appliance etc).
To do this I used
rsyslog and Ubuntu Server (14.04 LTS) acting like a syslog relay.
In this scenario the remote appliance sends the log to the Ubuntu Server (listening on port udp/514) and the server store&forward the logs to one or more server/device. Continue reading “Rsyslog – Store and Forward messages to other hosts”