Author Archives: wizzy

Mikrotik HTTP server vulnerability

This is for those who are having the HTTP service of mikrotik activated on the internet.

On March 2017 Wikileaks published some documents that supposed to belong to CIA under the name of Vault 7, describing that CIA has an exploit called “ChimayRed”  by which can inject malicious code on RouterOS if the HTTP service is not protected.

You can find info and information on solving this, here.

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Mikrotik pure IPsec VPN and android device as client

Due to issues reported, I had to re-write this guide. This time all certificates are generated by mikrotik routerboard. I use openssl just to create the .p12 personal information exchange file for the android client.

Mikrotik routerOS used : 6.41.1
Android version used : 7

First we have to create some SSL certificates. A CA, a server certificate and a client certificate. Let’s start with the CA. Replace XX and xxxxxx with your information :

/certificate
add name=ca-template common-name=myCa key-usage=key-cert-sign,crl-sign days-valid=3650 key-size=2048 country=XX state=xxxxxx locality=xxxxxx organization=xxxxxx unit="Certificate Authority"
sign ca-template name=myCa
set myCa trusted=yes

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Dump1090 on CentOS 7

Dump1090 is an ADS-B decoder and it is used with the RTL-SDR dongle. Automatic Dependent Surveillance Broadcast or ADS-B is the system that is used by aircrafts to transmit their GPS position. Dump1090 receives this information from the  RTL-SDR dongle and prints out the location of the aircraft on google maps.

This guide will cover the installation of dump1090. To work, you neet to have the RTL-SDR dongle and of course an antenna tuned to 1090MHz . Continue reading

Custom images on cisco 79XX telephone sets

To be able to add images on devices, you must already have a TFTP-Server and of course the necessary .xml configuration files.

Every cisco telephone set has it’s own demands. The image format must be on .PNG with specific dimensions

Telephone set Image dimensions (pixels) Thumbnail dimensions(pixels) TFTP Folder
7906/7911 95 X 34 23 X 8 /Desktops/95x34x1
7941/7961/7942/7962 320 X 196 80 X 49 /Desktops/320x196x4
7945/7965/7975 320 X 212 80 X 53 /Desktops/320x212x16
7970/7971 320 X 212 80 X 53 /Desktops/320x212x12

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Asterisk alarm receiver

WARNING : This solution is not the best way to protect your property.

First of all, I am not a programmer so many of you will notice my elementary skills on coding. If you have anny issues or suggestions please contact me at info[at]wizzycom[dot]net

Some information about Ademco Contact ID.

Ademco Contact ID is a protocol that establishes communication between a a security system and a monitoring station . The security system sends a 16-digit code to the monitoring center and the monitoring station converts this to readable information.

Let’s see the sections of this 16-digit code :

1111223444556667

The monitoring station receives the code above ( not a real example, but it is easier to understand the sections ) : Continue reading

Cisco router initial configuration

There is no golden rule on this. Everyone has it’s own way to do a basic configuration on a cisco router. Here is mine.

Some routers are pre-configured by cisco. The first time that the router powers up, it will ask for a username and password which is always cisco/cisco. This is one-time-password. If you login from console and you don’t change this, then you will be locked out. In case of pre-configured router, I always erase the running configuration by issuing : Continue reading

How to install VDR on CentOS

VDR is an application that allows us to do video streaming using as source a DVB-S or DVB-T adapter. This guide was tested on CentOS 6.4 x64. I used VDR version 1.7.22 and version 0.5.2 of streamdev server plugin. A prerequisite is that the system must have installed a DVB adapter.

Let’s install some groups and packages

yum groupinstall "Additional Development" "Development tools"
yum install fontconfig fontconfig-devel freetype freetype-devel gettext gettext-devel libcap libcap-devel libjpeg libjpeg-devel

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