These are the steps that I followed, in order to make a DHCP server in Debian 9 Stretch.
First of all we need to assign an IP address on our main ethernet interface. For this guide, I will use interface enp0s2. So we have to edit the file /etc/network/interfaces and add the following :
iface enp2s0 inet static
Then we need to download our dhcp package.
sudo apt install isc-dhcp-server
LTSP (Linux Terminal Server Project), adds thin client support to Linux servers. Just imagine PCs without a hard drive, running linux over the network. Pretty cool!
So what do we need to accomplish that ?
We just need a DHCP service (with specific options like 66, 67, 17), a linux box running the LTSP server and some client PCs connected to the same network. You will find many guides on the internet on how to install a LTSP server. All guides install the DHCP server on the same box. Also they are using DHCP proxy etc. My case has a DHCP server working on mikrotik routerOS.
So, in this guide, I assume that my local network is 192.168.1.0/24, my mikrotik device is the gateway of the network and has an interface (ether1) with IP address 192.168.1.1 and my linux box has the ip address 192.168.1.10 and runs ubuntu server 16.04. Continue reading
Today, for troubleshooting purposes, I needed to capture traffic from a Mikrotik wireless access point that I have. Mikrotik devices have a build-in tool called Packet sniffer, which does exactly what I need but what if I had these captures on a remote PC ?
Well we can accomplish this and have the captures on wireshark. All we need is network connectivity, of course, between the Mikrotik device and the PC running wireshark. I am using wireshark 2.2.7 by the way.
For the past 3 days, I was looking for a way to make changes to the classic’s theme CSS. As an amateur, I thought that if I make the changes I want to the files that are located on the _dev directory inside my theme, changes will be converted to CSS……. WRONG !!!
So I started looking harder. There are many solutions on the internet. Some almost worked, some not, some were to complicated to understand. After spending hours and hours o this, I final made it. So here it goes.
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 :
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
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
If you suddenly loose Internet access, you can play an endless running game. This only works if your computer isn’t connected to the Internet.
Meet T. Rex. He shows up when Chrome can’t connect to the Internet. It looks like this: Continue reading
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
||Image dimensions (pixels)
||95 X 34
||23 X 8
||320 X 196
||80 X 49
||320 X 212
||80 X 53
||320 X 212
||80 X 53
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 :
The monitoring station receives the code above ( not a real example, but it is easier to understand the sections ) : Continue reading
I had the task to get a wordpress website working on the internet. The website was only used locally under the domain intranet.local. So the customer wanted to publish it to the internet under the domain example.com but also under the domain intranet.local. Continue reading