Author Archive

Migration of a decade old PHP Application to a New Server

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We have a success story with a client that we’d like to share. One of our client’s wanted to migrate a decade old PHP application running on deprecated software to a new server. His service provider had already warned him that the application is deprecated and probably has a lot of vulnerabilities and that he needed to fix the problems in existing code before migrating it to new server.
We looked into the old server, redeployed the application on a …

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Debian rsync Checksum Support

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The worst thing that can happen to a Debian Mirror System Administrators is that the file system of the server gets corrupted, which starts sending a File Checksum Mismatch to the repository users-as some of the packages become corrupted. File system check will only resolve the issues related to file system, but you have to download the corrupted packages or else the repository users will start facing problems.
We faced a similar problem when we started looking for rsync checksum supported mirror in …

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Monitoring of Servers using Custom Scripts

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Why regular server monitoring is important?
It’s innocuous to say many businesses heavily bank on the stability of their IT network and infrastructure to boost their productivity and keep their customers happy. A server downtime means major loss in money and business reputation at stake. Regular monitoring of servers is important because it lets you know about issues/problem before they reach critical level e.g. Increase in disk space, Postfix Issues/errors, MySQL Replication status, HTTP/HTTPS  etc.
 How do we monitor?
We …

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Why PCI Compliance Tests are Important for Organizations

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PCI compliance tests are required by organizations that deal with electronic funds transfers or storing credit and debit card information.Many free PCI tests return false positives on security issues that are already patched by vendors.We had one such event where a client came to us with the results of a PCI scan that contained false positives mentioning that:

The server is vulnerable to certain OpenSSH vulnerabilities CVE-2015-5600, CVE-2010-4478,CVE-2014-2532, CVE-2014-2653 and CVE-2015-5352
The server was doing plain authentication on SMTP …

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Offsite Backups with Retention

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Data is the heart of any business, it’s important that you project it. Sometimes data loss can create huge problems for a business and even result in loss of revenue. The best way to protect against accidental loss of user data, hardware failures, database corruption and even natural disasters is to take onsite as well as offsite backups.
Our requirement was that not only backups should be placed somewhere safe & away from the server but they should have a …

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Maintaining High Availability of 5 Different Websites with One User

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One of our project created by vteams had a High Availability Requirement. In additional to databases, our main task was to sync files created by the application automatically from one server to another for five web sites. The sites were already configured to be run via 3 different Linux users which development team used to access for development purposes.
To sync all these five websites our engineer proposed BTSync however each BTSync commercial license costs $39/year and a single BTSync …

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Syncing of Multiple Mailboxes Using Parallel

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Parallel being a command-line tool for GNU/Linux operating systems lets a user to execute shell scripts in parallel. It allows you to execute jobs in parallel using one or more computers. A job can consist of a single command or a tiny script that has to be run for each of the lines in the input. An input can be a list of files, a list of users, a list of tables or a list of URLs. A job might …

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How to Migrate Mailboxes between IMAP Servers using IMAP (imapsync)

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Have you ever been caught up in a situation where you needed to transfer everyone’s mail from one provider to another? Using the mail client one at a time can be a hectic process and takes a lot of time. But by using imapsync it is a simple process.  Imapsync being an IMAP transfer tool allows you to transfer IMAP accounts or to backup IMAP accounts. The good thing about imapsync is that it allows incremental (you can halt the …

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Temperature Monitoring of Datacenter using Raspberry Pi and Temperature Sensor

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A datacenter being the building block of a company has to be safe from viruses, spywares. It is also important to note that environmental issues like temperature, humidity, airflow, smoke can be equally devastating for the IT equipment. Luckily, our engineers know to tackle these sorts of problems. Apart from providing 24-7 monitoring of servers we setup a wide range of sensors that will keep your datacenter safe.
Problem
Electronic equipment generate a lot of heat when in operation especially …

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24/7 Monitoring of Servers with 3rd Party Services

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It’s innocuous to say many businesses heavily bank on the stability of their IT network and infrastructure to boost their productivity and keep their customers happy. A server downtime means major loss in money and business reputation at stake. Our customer wanted his server to be monitor 24/7 but without the hassle of setting up a new server just for monitoring purposes, which is cost ineffective specially when only used for monitoring a single server. Our client wanted monitoring of …

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