Žilinská univerzita > Fakulta riadenia a informatiky > Katedra informačných sietí

VTP (+DTP) security threat - myth or fact?

There is some confusion and misunderstanding regarding VTP (VLAN Trunking Protocol)+DTP (Dynamic Trunking Protocol) and this article will hopefully make it all clear. Most of the confusion comes from the statement that VTP is always a security threat to your network. There are even some CCIE material which I find to be wrong on this topic so my advice here is to test everything by yourself.

 

I assume that you have sufficient knowledge about VTP and DTP, if not or you would like to refresh your memory take a look here:

 

VTP

How to install Asterisk on Debian - APT repository

Latest Asterisk packages we should install now directly into our Debian/Ubuntu servers using the apt-get tool. More info at https://wiki.asterisk.org/wiki/display/AST/Asterisk+Packages#AsteriskPackages-APT%28Debian%2FUbuntu%29

 

Instructions Options 1) (debian and Ubuntu)

First, we will import Asterisk project apt key:

Kamailio 3.3 and FreeSWITCH 1.2.2 interconnection for voicemail and conference services on Debian Squeeze (6.0) 64bit - TUTORIAL

This tutorial will, hopefully, guide you on configuration of interconnection between Kamailio and FreeSWITCH. We will use Kamailio as proxy and registrar server and use FreeSWITCH only for services.

 

All of the configuration files that have been changed are part of attachment of this tutorial. In Original.zip you will find the original files and in Modified.zip the modified version. So you can actually compare them side by side. This could be really useful and I hope it will help you in every way possible.

 



Setting an IP address using the ip linux command


1) First, we'll check our current status and linux names of interfaces

ip a

or

ip link

where commands lists our' machine network interfaces, for example:

 

2) Next, using the subcommand addr we will add an IP address with a proper nework mask length

ip addr add 192.168.1.10/24 dev [INTERFACE_NAME]

for example:

ip addr add 192.168.1.10/24 dev eth1

 

3) No we will add default gateway's IP address  for correct routing

How to enable roaming in IMS platform using the HSS web GUI

When you try to register IMS user via P-CSCF in visited network (roaming) in Kamailio IMS platform you will probably get following error:

A Survey of Open Source Products for Building a SIP Communication Platform

I'm placing here an article, about the SIP platforms and platform components. Hope help someone! 

Link to the full version: http://www.hindawi.com/journals/am/2011/372591/ref/

 

Pavel Segec and Tatiana Kovacikova

Department of InfoCom Networks, University of Zilina, Univerzitna 8215/1, 010 26 Zilina, Slovakia
 

A VERY BASIC DHCP server configuration under Debian OS

This article describes a very basic configuration of DHCP server (isc-dhcp-server) under Debian OS.

 

Installing DHCP server:

#apt-get install isc-dhcp-server

*note: package isc-dhcp-server replaced the old dhcp3 package

 

We need to specify the port to bind to. To do this we need to edit the file "/etc/default/isc-dhcp-server":

Six open-source IMS clients - features overview - February 2012

The table provides feature overview of six open source IMS clients:

 

Installing and configuring Restund - STUN/TURN server

This guide describes how to install and configure RESTUND STUN/TURN server for supporting TURN functionality. 

This sollution is still in TESTING STATE!!!

TURN server seems to work properly, but sometimes the klient channel allocation on server side is not working and the media stream wont start!

Testing with: Restund v0.4.0, Kamailio v3.2, X-lite 4.

 

 

First we need to install compiler g++ and make:

 apt-get install g++ make

 

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