DNS SRV lookup from Powershell

[After posting this blog, I have realized that Powershell 3.0 already provides a built-in cmdlet called Resolve-DnsName which could help you make any kind of DNS queries. But I still wanted to leave this blog post active for those who might want to see how it could be done with Win32 API. Also Powershell 3.0 is…


Testing STUN/TURN server connectivity from external networks through UDP 3478 by using Powershell

Hi there,   While working on a Lync connectivity test tool, I developed a STUN/TURN server connectivity test script in powershell which might be handy when you want to make sure that your external clients will be able to communicate with STUN/TURN server via UDP 3478 (STUN/TURN connectivity through TCP will also be added later on)….


External Lync 2013 clients cannot upload ppt or other files and whiteboard, poll, Q&A are greyed out on Lync client

Hi again,   In this blog post, I want to talk about a Lync 2013 problem where external users fail to upload powerpoint presentations. When external Lync user tries to upload a ppt file to an online meeting, basically nothing happens and once the failure occurs, all web conferencing related features are greyed out on…


Decrypting SSL/TLS sessions with Wireshark – Reloaded

Hi there,   In a previous blog post of mine, I went through the steps of decrypting SSL/TLS traffic by using wireshark and openssl tools. In this blog post, I wanted to talk about the same procedure again because it got even easier to decrypt encrypted traffic with Wireshark since then.  Here are the steps…