Monday, 24 August 2015

How to install Regional languages in Windows 10 - Tamil | Hindi

This post will let you know how to install Tamil or any other regional language that you use in your Windows 10 machine. In Windows 7, I was able to view Tamil fonts in Chrome, IE and in other in-built apps. But after upgrading to Windows 10, I could not view these Tamil fonts in any of my apps. I did a little search, found a fix and I am going to share it to my fellow Tamil folks!

Before I start, Let me tell you why it's not working in Windows 10. Windows 7 had some pre-installed Tamil fonts like Latha and Vijaya by default. But in Windows 10, these fonts had been moved to a pack called "Supplemental Tamil Fonts" which is marked as a Optional feature. So enabling this optional feature, will help us to get our language back.

Follow the below instructions to enable Tamil letters on Windows 10,

Click the Start button.
Click Settings.

In Settings, click Time & language.

Click Region & language.

All regional fonts to your country will be listed, If Tamil is not included in your languages, click the "+" icon next to Add a language.

Scroll to find Tamil, then click on it to add it to your language list.

That's it! You should be able to read your Tamil articles. :)

[Fix] Your Installation CD-ROM couldn’t be mounted | Kali Installation Error

Kali linux 2.0 is a Penetration testing Distro from Kali Team. Earlier I had posted two articles on how to install Kali (Sana) using both GUI (Live-CD) and Traditional method. But later I tried to install Kali through USB and I received this error during the installation process. "Your Installation CD-ROM couldn’t be mounted.
This is probably means that the CD-ROM was not in the drive. If so you can insert and try it again." I googled and found that it is a known bug and can be resolve easily. To known more about this bug, check

Sunday, 23 August 2015

How to upgrade Cisco CUCM - Step by Step guide

In my last post, I showed how to install CUCM 8.x on Vmware. After the successful installation of 8.0.2, I planned to migrate my 8.0.2 CUCM to 9.1.2 and recorded the steps involved in the upgradation. This post will help you understand how to Migrate CUCM from version 8.0.2 to 9.1.2. Before we proceed with the migration process, I want you to make record your IPT configurations and CUCM server settings. This might help you to verify the settings after the CUCM upgrade. So, make a note of following information.

• IP addresses, hostnames, gateways, domain names, DNS servers, NTP servers, and SMTP information
• Administrator, cluster security, and Certificate Trust List (CTL) security token passwords
• Server versions and time zones
• All services running on each server and the associated activation status
• Call Detail Record server configuration and any additional information
• LDAP information and access details
• SNMP information

In addition to the above, you must determine the registration counts by using the RTMT or the Unified Communications Manager device count summary. For each node, record the number of each device type that is displayed. For example, record the number of each type of registered IP phone, gateway, and each FXS, FXO, T1CAS, PRI, MOH, MTP, CFB, or XCODE device resource.

CUCM Upgrade Recommendations

If you have Cisco support for your Unified setup, Make sure that you consult with Cisco TAC team before proceeding with the Migration process.

Before migrating your production environment, try to emulate the upgradation setup in a lab to avoid last minute issues.

Perform a Disaster Recovery System (DRS) backup up of your entire cluster before each upgrade. Upgrading without a current backup can result in lost data, lost node configuration, or disruption to services if there are complications during the upgrade process.

Determine if the versions of the devices and applications in use in your organization—such as endpoints, gateways, voicemail, presence, or other applications—are supported by Unified Communications Manager Release 9.1(x), You can refer the below link to know more about the compatible devices.

Pre-Upgradation Procedures

Follow the below steps to reduce the downtime during upgradation process.

To shorten the upgrade time, delete or purge Call Detail Records (CDRs) or log files that you no longer need.

Use the Cisco Unified Communications Manager License Count Utility to generate a license report and save it in CSV format. To download the utility and its documentation, see

Extend the database replication timeout value so that subscriber servers have sufficient time to request replication.

Since we are going to upgrade from 8.0.2 to 9.1.2, this is going to be a Refresh upgrade. Hence installing a COP file becomes mandatory. You can download the COP file from this link,
COP file would be in below format, ciscocm.cup.refresh.upgrade_v<latest_version>.cop

Cisco recommends to upgrade the Publisher first, Also you can register all your IP phones in Subscriber to avoid downtime for IP phones.

CUCM Upgradation Process

Follow the below steps to upgrade from CUCM version 8.x to 9.1.2.

Step 1: Sign in to Cisco Unified OS Administration Page. Click on the Navigation drop down menu and select Cisco Unified OS Administration and login with your credentials.

Step 2: Installing COP file, Remember only Refresh Upgrade (Version 6.0 till 8.5.1 to 9.1.2) requires the installation of COP file. If you are running 8.6 or a higher version (Standard Upgrade), you can skip this step.

To install COP file, Go to Software Upgrades > Install/Upgrade

Select Remote Filesystem and enter your FTP or SFTP server details where you have your COP file stored. And click Next.

Cisco ASA 8.4 on GNS3 - Step By Step Guide

Cisco ASA stands for Adaptive Security Appliance.In brief, It is a security device that combines firewall, antivirus, intrusion prevention, and virtual private network (VPN) capabilities. It can be used as a security solution for both small and large networks. This post is applicable for adding any versions of Cisco ASA 8.2,8.3,8.4 on GNS3.

Before we begin.,Please make sure that you have below items in your machine.

1.Download & Install GNS3

2.Cisco ASA 8.4 ISO image(valid)

Now Let's assume that, you have installed GNS3 on your machine.

Steps to be Followed,
Step 1:- Download the ASA image & Extract them. Copy the extracted image & Paste them to GNS3 Images Directory.

Ex: C:\Users\<user name>\GNS3\images\

Step 2:-  Open GNS3 --> go to edit---> Preferrence ----> QEMU---> QEMU VMs

Step 3:- Click New ---->Select QEMU VM type ---> ASA 8.4(2) ----> Next Button.

Step 4:-  Give whatever name you want to assign to ASA.