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To avoid physical security breaches and un-authorized access from publicly available network ports laying in lobby or reception, companies use port based authentication schemes. Once implemented device needs to authenticate itself with the authenticating server to prove its identity and once proved, gets access to the network. Thus providing authentication mechanism to devices wishing to [...]

In the increasing race of deploying VoIP solutions, Microsoft announced new release of its Office Communication Server 2007 at voicecon. In spite of having all the deployment and installation guides for OCS server, many people are clueless about its installation. The main reason behind it is its complexity. Looking at wide range of service portfolios [...]

Researchers from VIPER Lab, kept their promise of delivering exciting and freaky features in the coming version of videoJak. VideoJak rocked Defcon 17 with some thrilling video attack demonstrations which we have seen only in Bond Movies.

Welcome to the my first multi-part tutorial on configuring Cisco Skinny Phones with Asterisk. This is two part tutorial and is divided as : Part 1: Configuring asterisk with Skinny Client Control Protocol (SCCP) module Part II: Configuring the Cisco Phone and registering it with earlier configured Asterisk Server. If you already have asterisk configured, [...]

Sipera VIPER Lab is in news again; this time by targeting Award Winning UC solution from Microsoft.  Viper Lab released first ever Microsoft Office Communication Server Assessment Tool (OAT) at VoiceCon 2009 in Orlando. Tool is named OAT and is develop to help IT manager and security practitioners evaluate the security architecture of their deployments [...]

My previous post talks about Installation of Cisco Unified Communication manager 7.0 under VMWare. Once you have installed UCM under VMWare, Cisco gives 150 free license units from its demo licenses. As you keep adding phones and enable various services, these license units gets consumed. Once the license unit count reaches to zero; you can [...]

Being a VoIP Security researcher, I need seamless access to variety of Call managers. Its always better to have a small lab setup in your home for offline research requirements. When one think about setting up a low budget, realistic lab, virtualization is the first thing comes in the mind. Today i will walk you [...]

If one asks VoIP vendors about their biggest security risk, the obvious answer would be eavesdropping. It’s a breach in confidentiality of the communication and can cause huge business impact. Unified Communication sniffer (UCSniff) is a next generation VoIP sniffing tool from VIPER Lab.  It can smoothly detect and sniff ongoing audio/video call sessions between [...]

Like most of the users I too used to get “Cannot Synchronize Address Book” notification whenever i used to login in my OCS Communicator client. This happened when we do custom installation of any application, do not configure optional features etc. I used to ignore that notification most of the time except today. I got [...]

hi All, Apple iPhone market is booming a lot these days. Lot of incidence of iPhone being out of stock from Apple store are reported in recent past. Open source community is busy in developing new stuffs for iPhone/iTouch and trying to scale it much ahead than simple phone or music station. Till now it [...]