Solution to VOIP Injects for Locked Shields 2014

In 2014, for the first time in Locked Shields history, VOIP topic was brought to the exercise. The task of Blue teams was to defend misconfigured VOIP systems that had been built by Green team and to solve two VOIP injects opened during the LS execution. The article that focus on describing VOIP scenario and problems connected with deployed VOIP […]
Continue reading…

Share
 

Blue VOIP Systems Misconfiguration for Locked Shields 2014

The article aims to examine misconfiguration of Cisco Unified Communications Managers 8.5.1 (CUCMs) that represented the core of pre-built VOIP infrastructure for the Locked Shields 2014 exercise. We (Green VOIP team members) developed Blue VOIP systems with working but improper security configuration in order to make them more vulnerable against Read team hack attempts. Cisco […]
Continue reading…

Share
 

VOIP Scenario for Locked Shields 2014

In a couple months ago I was asked to bring VOIP topic to the Locked Shields 2014. It was a great challenge for me as July 2011 was the last month I touched Cisco VOIP configuration. Nevertheless I decided to accept this offer and brush up my VOIP knowledges. Previously known as the Cisco Unified […]
Continue reading…

Share
 

VOIP HOME LAB - 1.11 Filtering Traffic on Headquarters Router with Access Lists

In a previous tutorial we have configured SIP trunk and route patterns which allow users to make phone calls between Branch office and Headquarters. Connection between these two sites is not filtered and depends only on correct routing configuration on network devices. For instance traffic from data subnet VLAN 11 that is generated by users in […]
Continue reading…

Share
 

VOIP HOME LAB – Part 1.10 Connecting Headquarters and Branch via SIP trunk

The tutorial discuss configuration steps that are needed to connect Headquarters and Branch office using SIP trunk. It is only showing configuration required to be done on Cisco Unified Communications Manager (CUCM) that is located in the Branch office. The configuration of CUCM located in Headquarters will be not explained here as it is almost […]
Continue reading…

Share
 

VOIP HOME LAB - Part 1.9 Cisco 2621XM and Belkin N+ Router Configuration

This is another tutorial from the series of VOIP tutorials that describe building VOIP home lab based on Cisco Unified Communications Manager. A network topology is here. So far we have finished configuration all of network devices, servers, Cisco IP phones and end-stations located in the Branch office LAN network. As a result, we can […]
Continue reading…

Share
 

VOIP HOME LAB - Part 1.8 Cisco Unified Communications Manager 8.5.1 Configuration

In a previous tutorial we completed Cisco Unified Communications Manager 8.5.1 installation. In this tutorial we are going to continue with CUCM configuration to support Cisco phones according to our network topology. At the end on the tutorial we should be able to place phone call between Cisco IP phone 7961 connected to Cisco Catalyst 3550 […]
Continue reading…

Share
 

VOIP HOME LAB - Part 1.5.2 Open vSwitch and VMware Workstation Configuration

In a previous tutorial we described how are the network devices and virtual machines connected in our VoIP home lab network. We will continue with Open vSwitch and VMware Workstation configuration. 1. VMware Workstation Configuration Start VMware Workstation. $ sudo vmware a) Create new host-only interfaces By default three VMware interfaces – vmnet0, vmnet1 a vmnet8 are […]
Continue reading…

Share
 

VOIP HOME LAB - Part 1.5.1 Open vSwitch Configuration - Introduction

So far we have installed Windows 7 and Linux Core on VMware Workstation virtual machines. We want to connect these virtual machines into our VoIP home lab. To do this a central connection point must be deployed on the computer where virtual machines are installed. The point must be able to assign traffic from virtual machines to different VLANs and tag […]
Continue reading…

Share
 

VOIP HOME LAB - Part 1.4 Linux Core 5.x x86 Installation on VMware Workstation

This is another tutorial from the series of articles that describe how to build network infrastructure for voice home lab. The tutorial shows installation of Core 5.1 x86 Linux on VMware Workstation 10. Installation of Linux Core on Qemu is explained here and here in more detail. Although both installation methods achieve the same result, the first method […]
Continue reading…

Share