Protocol Basics

Layer:
Application

Transport:
TCP or UDP

Port(s):
5060, 5061

RFC(s):
2543, 3261

SIP (Session Initiation Protocol)
SIP is by far the most popular protocol used in VoIP communication today. SIP was designed as a signaling protocol in charge of setting up and tearing down sessions between two or more devices. Additionally, SIP can be used to modify existing sessions. The protocol was designed [...]

Categories: Voice / Voice over IP

If you have an interest in information security from a technical or managerial point of view, check out Principles of Information Security. It does an excellent job of presenting material for both audiences.
If you have other vendors you would like to see on this list, send me a message. I’ll keep updating the list until [...]

Categories: Security Updates

If you’ve ever built a site that has different kinds of users, you’ve probably run across the case where you want a limited number of users to appear in a particular list. For example, you may only want staff members to be assigned ownership of a particular object. If your site has a really huge [...]

Categories: Programming

A special extended edition of Tech Messages for 2010-03-05 through 2010-03-09:

How P2 Changed Automattic — Matt Mullenweg
Close .tpl access with .htaccessYou can do this in your Apache configuration file, too.
Cisco confirms exit from WiMAX RAN market – Rethink Wireless
The Right Way to Add Custom List Markers to Unordered Lists | Impressive Webs Toronto

Categories: Tech Messages

Somehow, I have let my Gmail inbox get totally out of control. I don’t know if it was the holidays or what, but as of this morning, I had over 800 unread messages in my Gmail inbox. I decided a little while ago that it was time to focus on getting the situation resolved. Gmail’s [...]

Categories: Software