Introduction This post explains how to create an instance (virtual machine) in Alibaba Cloud platform for free( for 12 months). Alibaba Cloud is relatively new on the market and it’s logical that they offer a free trial for one of the basic instances. If you need a virtual machine for some project or education and
Introduction This post shows how to use external black or white list of IP addresses using a new feature called Threat Feed. Starting with FortiOS 6.2 it’s possible to import external IP address and Domain Name lists for using in Firewall Policies and DNS Filter profiles. FortiOS 6.0 allowed using imported lists in Proxy Polices,
Introduction HTTP server is often required when you want to serve some files to remote hosts, or update firmware of some device. This post shows how to run a simple HTTP server on any machine (Windows or Linux) which has Chrome Web Browser installed. Before we start This extension is not a replacement for a
Introduction In this post you will see how you can run Fortigate virtual machine on a Windows operating system. I will be using VMware Workstation 15 for virtualization. Evaluation license Fortinet allows us to download and use the virtual machine for free for two weeks. It means that you don’t have to buy anything to
Introduction This post gives an overview of GNS3 software and shows how to install it. It is a part of GNS3 Tutorial series. What is GNS3? GNS3 is a free network emulation software with GUI that can be used to run real network OS (for example, Cisco IOS) images, and build various network topologies in
Introduction I have recently had a strange issue with call transfers on CME 12.0. I was getting “SIP/2.0 488 Not Acceptable Here” from ISP while trying to transfer a call from PSTN to another extension. Let’s see how we can solve this problem and make the transfer work. Equipment Used The phone I used was
Introduction In this article we will see how we can capture and export network traffic on a Cisco ISR 4331. The provided instructions are applicable to any Cisco ISR 4000 series router. The exported traffic has a pcap file format and therefore can be easily opened and analyzed in Wireshark. The ISR 4331 used in
Introduction In this post we will learn how to upload SIP firmware to Cisco 7911 IP Phone. This will make possible using the phone with third party SIP servers. The instruction below applies to all Cisco 7900 series IP phones. Step 1. Download the SIP firmware. Before we start, let’s download the required SIP firmware
Introduction This article show step by step how to upgrade the firmware of a Cisco IP phone managed by CME(Call Manager Express). I will be upgrading Cisco 8851 IP phone(from version 12-0-1-11 to 12-5-1SR3-74) using Cisco ISR4331/K9 router as a CME. Step 1. Download the firmware files The first thing we need to do is
Introduction In this article we will learn how to change the file format and bit rate for call recording files on a FreePBX server. This will allow you to save a lot of disk space without any noticeable loss in quality of the call recording files. Before you start Call recording is disabled by default
