Skip to main content

LAN Chat Servers

Recently I wanted a LAN Chat Server for my CTF Network.  A few weeks ago I had used chatplus on Ubuntu, and I thought it was so easy to install and use.  For the server, all you do is sudo apt-get install chatplus_server, and start it up.  Then all the clients just need to sudo apt-get install chatplus_client, and they can connect easily to the server.  

However, my Admin box on the CTF Network is a Winblows box, so I needed a Windoze program.   I did some playing around, and it looked like the simplest solution to my needs was Openfire.

I downloaded and installed the Openfire executable, and it installed pretty easily.  I looked around, and although it said that users could create their own accounts, it sure looked to me like I had to create the accounts myself.  Here's a screenshot of the 10 users (user1-user10) I created, each with a password of "password."

By default, there's a group room called "conference" room.  So I joined it with a Pidgin client in Windoohs, and a Pidgin client in Backtrack.   Here's a screenshot of that room:

I installed pidgin in my box to see what its client would look like.  Here's that:

Since most of the players on the CTF network will be using Backtrack, I thought I'd install that and try it as well.   Here's the configuration screens to Pidgin in Backtrack:

Even though it appeared users couldn't just log in like they could when I used chatplus (meaning, it appears that I have to create an account for them before they can log in), it still seemed like a pretty neat chat program.  I'll probably leave it on the CTF for a while and see if anyone uses it.  If not, I'll probably just delete it.  


Popular posts from this blog

atftpd vs tftpd-hpa

Recently I was trying to tftp files from a Windows computer to a Kali box.   One version of Windows worked, but another didn't.    After much troubleshooting, here were my symptoms:

I could tftp a file from-to any Kali box from-to another Kali box
I could NOT tftp files to a specific Windows 7 box from any Kali box
I could NOT tftp files to a Chrooted-Ubuntu-Chromebook box from a Kali box

After MUCH troubleshooting, going through every setting in atftpd, it seemed like it literally was a client OS problem.  Different clients simply would not download files---unacceptable.

Thus, I switched to tftpd-hpa.   To install:
apt-get install tftpd-hpa

files go to/come from /srv/tftp, but it needs to be a tftp user. Thus, I needed to:
chroot -R /srv/tftp

Also, if you want to be able to put files ON the tftp server (from a client), you need to modify /etc/default/tftpd-hpa:
change "TFTP_OPTIONS="--secure" to "TFTP_OPTIONS="--secure --create"

I also changed the IP li…

ADS-B plotting with Kali (and other SDR goodies)

Recently I wanted to try some Software Defined Radio stuff.   
I had a RTL-SDR, FM+DAB, DVB-T USB Stick Set with RTL2832U & R820T. that I got from:
But, even though this dongle would break out FM radio stations, and ATC frequencies (like the local Ground Control, tower, and even ATIS), which was cool, it wouldn't break out ADS-B.   
Thus, I bought a Vantech Green Mini RTL2832U R820T DVB-T SDR DAB FM USB DIGITAL TV Tuner Receiver RTL-SDR Project + DAB dongle Tuner MCX Input from Amazon, and tried this.  
This dongle was able to listen to the 1090MHz frequency required for ADS-B (as it goes from 25MHz to 1700MHz).  There were tons of Windows programs out there for breaking out and plotting ADS-B Mode S broadcasts, but not many for Linux.  
For Kali Linux, here's how I got it running and plotting planes around my home:
0) before you start, you should do an apt-get update to ensure you hav…

Temper Temperature monitor on a Beaglebone Black

Beaglebone Black as a temperature monitor:

Recently I wanted to monitor the temperature of my shed.  I thought I'd use a small computer such as a Raspberry Pi or a Beaglebone or Odroid.

My Raspberry Pi boxes were all in use, so I grabbed my Beaglebone, which was doing nothing.

I flashed it with the Debian9.32018-03-054GB SDIoTimage, but that seemed like it was running lots of bloatware and the ethernet interface wouldn't take a static IP with /etc/network/interfaces.

So I went with the Debian9.32018-01-284GB SDLXQTi image instead.  I still had the same problem, that lots of junk was running, and I couldn't configure my interface by modifying /etc/network/interfaces

So my first step was to get rid of all the bloatware.  If you're using a Raspberry Pi or something, you can skip this and just go to the second step below

STEP 1--Remove Blotatware from Beaglebone Black:

With some searching, I came across this post:…