How to Fix “No Bootable Device Found” Error in PNETLab for QEMU Images

If you’re working with PNETLab (PnetLAB) and encountering the “No Bootable Device Found” error when booting a QEMU image, don’t worry—you’re not alone. This issue is often due to incorrect image or folder naming. Fortunately, it can be quickly fixed by following the proper naming conventions for QEMU images.

Why Does the “No Bootable Device Found” Error Happen?

The “No Bootable Device Found” error typically occurs in PNETLab when the image folder name or the image file name does not match the required naming structure. When PNETLab attempts to boot a virtual machine (VM), it looks for a specific folder and image file structure to locate the bootable file. If this structure is incorrect, the image won’t boot.

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How to Fix iShare2 Not Working After PNetLab VMware Image 4.2.10 Installation

How to Fix iShare2 Not Working After PNetLab VMware Image 4.2.10 Installation

Pnetlab

If you’ve recently installed the PNetLab VMware image version 4.2.10 and are experiencing issues with iShare2 not working, you’re not alone. This is a common problem faced by many users, but fortunately, there’s a straightforward solution. This article will guide you through the necessary steps to resolve the issue and get your iShare2 running smoothly again. this is because of they have change the repository to download images.

Step 1: Verify Internet Connectivity

Before diving into patching and upgrading, the first step is to ensure that your VMware workstation has a stable internet connection. This is crucial as the patches and updates you’ll need to apply require internet access. Check the network settings in VMware to confirm that the virtual machine is connected to the internet.

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How to Recover MikroTik Router RB750Gr3 from Failed Firmware Upgrade Using Netinstall

MikroTik routers are known for their reliability and performance, but sometimes things can go wrong, especially during firmware upgrades. If your MikroTik RB750Gr3 router has experienced a failed firmware upgrade, you can use the Netinstall tool to recover it. Netinstall is a Windows utility provided by MikroTik that allows you to reinstall the router’s firmware over the network. Here’s how you can use Netinstall to recover your MikroTik RB750Gr3 router.

Prerequisites:

  1. Netinstall Utility: Download and install the Netinstall netinstall64-6.49.11.zip utility from the MikroTik website (https://mikrotik.com/download/archive).
  2. Firmware Image: Download the correct firmware image for your MikroTik RB750Gr3 router from the MikroTik website.                                                      I used   routeros-mipsbe-6.49.11.npk  from MikroTik website (https://mikrotik.com/download/archive).Note :- Its recommended use the same version of Netinstall utility as firmware.
  3. Ethernet Cable: Ensure you have an Ethernet cable to connect your computer to the router Ethernet port Ether1 or WAN port.
  4. Power Adapter: Make sure your router is connected to a power source.
  5. PC IP Address : Configure your PC LAN IP address as 192.168.88.2 /24  and Netinstall Netboot IP address 192.168.88.3.

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Installing ZeroTier VPN Client on CentOS 7

ZeroTier is a powerful and easy-to-use VPN solution that allows you to create secure networks and connect devices across the globe. In this guide, we will walk you through the installation process of the ZeroTier VPN client on CentOS 7.

ZeroTier

Step 1: Install EPEL Repository

First, you need to install the EPEL (Extra Packages for Enterprise Linux) repository, which contains additional packages for CentOS.

yum install epel-release

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How to change SIP Port in Issabel

How to change SIP Port in Issabel

Securing Your Issabel IP PBX: A Step-by-Step Guide to Changing SIP Ports

Issabel IP PBX systems play a pivotal role in modern business communications, facilitating seamless voice and data integration. To enhance the security of your Issabel IP PBX, one effective measure is to change the default SIP (Session Initiation Protocol) ports. In this guide, we will walk you through the process of changing the SIP port on your Issabel IP PBX for improved protection against potential security threats.

1- Login to Issabel Web interface

go to  PBX > PBX Configuration > Setting > Asterisk SIP Setting  >  Advanced General Settings  >Bind Port

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How to Change Issabel PBX web interface ports for Enhanced Security

How to Change Issabel PBX web interface for Enhanced Security

In today’s digital landscape, ensuring the security of your Issabel PBX is crucial. One effective way to enhance security is by changing the default HTTP and HTTPS ports. This step-by-step guide will walk you through the process, making your Issabel PBX less susceptible to potential threats.

Step 1: Changing the HTTP Default Port

a. Navigate to the HTTP configuration file:

Open the file located at /etc/httpd/conf/httpd.conf using your preferred text editor.

b. Modify the default HTTP port:

Locate the line that reads “Listen 80” and change the port number to any desired port other than 80.

For Example I have changed 8089

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How to configure BSNL SIP Trunk on Asterisk

How to configure BSNL SIP Trunk on Asterisk or Issabel

BSNL now provides SIP Trunk with DIDs  in genreal they call it SIP PRI  and asking you to buy channels as they were selling copper  PRI links .Now they are providing same service with fiber optice cables on FTTH connections.

They are giving fiber link as same they are providing FTTH  internet services  with ONT and providing PRI service through SIP Protocal over the VPN  using OPEN VPN or SoftEther .

Depend on your convinent they are asking which VPN service you will use . Here I am using OPENVPN. But before implementing SIP PRI from BSNL as I was thinking it  can be  use  over OPENVPN from any internet network .

but they have played the game that there OPENVPN server can be accessed by only there network they have provided and sip server can be access only over VPN connection .I dont know  why they have used OPENVPN  if you are using IP based security and SIP authentication and SIP registration . they have just made it complicated if your Applicance does not support OPENVPN then you have to used additional device or router which support OPENVPN.then you can reach there SIP Proxy server.

Now below are the breif  steps to configure BSNL SIP trunk

BSNL SIP PRI
BSNL SIP PRI

 

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How to Connect two Grandstream UCM via SIP Trunk

Effortless Communication: Connecting Grandstream UCM via SIP Trunk for Seamless Internal Extensions Calling
In the realm of unified communication, Grandstream’s UCM series stands out as a reliable and feature-rich solution for businesses seeking seamless connectivity. This article aims to guide you through the process of connecting your Grandstream UCM via SIP trunk, enabling effortless internal extensions calling. Follow these step-by-step instructions to enhance your communication infrastructure and streamline internal collaboration.

Below are the youtube link with detailed stepby step explanation.

Step 1 – Create SIP Trunk on UCM Site A and UCM and Site B
Step 2 – Create Outbound Route to Call another Site UCM extensions
Step 3 – Create Inbound Route to recive calls from another site to local extensions.
Below are the Youtube link they have explained very well.

How to check Cisco router Hardware and License information

A Comprehensive Guide to Checking Cisco Router Hardware and License Information

Cisco routers are the backbone of many networks, ensuring that data flows efficiently and securely. To manage and maintain these routers effectively, it’s essential to have a clear understanding of the hardware components and licenses associated with them. In this guide, we will walk you through the steps to check your Cisco router’s hardware and license information.

Part 1: Checking Hardware Information

Knowing the hardware specifications of your Cisco router is crucial for troubleshooting, upgrading, and capacity planning. Here’s how you can check it:

Step 1: Access the Command Line Interface (CLI)

Using a terminal emulator like PuTTY or HyperTerminal, establish a console or SSH connection to your Cisco router.

Step 2: Log In

Log in with the appropriate credentials (username and password) to access the router’s command-line interface.

 

Step 3: View Hardware Details

Now, enter the following command:
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