Virtual Private Servers(VPS) has gained immense popularity over a couple of years owing to the performance and functionality advancements in the virtualization technologies. In order to experience the benefit of utilizing own dedicated servers, numerous customers are upgrading their existing Linux shared hosting packages to Linux servers. With the presence of Linux Security Model (LSM), Linux VPS are significantly more secure when compared with other operating systems, yet they are not perfect and are vulnerable to attacks. Being acquainted of the risks and outcomes will help you to maintain a balance between usability and security. It is necessary to adopt a methodology that will shield your server from the prominent attacks along with the efficient administration.
The fundamental action you need to do when you set on a new VPS is to set up a protected environment custom fitted to your needs. In this article, let’s have a look at some of the most common security measures to be taken in a Linux server environment. This isn’t a comprehensive rundown and does not cover configuration details, but rather it will cover the fundamental strides for securing a Linux-based VPS.
Configure a Firewall
Firewalls take a note of the traffic headed in and out of your server. If you want a truly secure VPS, you need to enable and configure VPS. Initially, your server should be set to utilize only the networking ports that are absolutely necessary for all the standard and legitimate services. Then set up your firewall, which poses as a barrier between the general internet traffic and your machine. Firewalls deny in and outgoing traffic, at the same time protects the rest of the ports from security breaches. Some of the popular Linux firewalls are IPTables, UFW Firewall, NFTables, IP6Tables etc
Utilize SSH For Secure Login
When managing a server where you do not have local access, you should sign in remotely. The most secure approach to sign into a remote server is by utilizing the SSH which offers end-to-end encryption to burrow insecure traffic over a secure connection.
It is obvious that one cannot hack SSH when they can’t discover it. In order, to prevent the malignant scripts from directly connecting to default port (22), you need to change the SSH port number. Implementing a solution like fail2ban helps with the general security of your SSH configuration. They monitor log files to determine if the remote system is a legitimate user, if not they temporarily ban future traffic from the associated IP address.
Set GnuPG Encryption
To add even more security, you can facilitate login using a matching private key which is so complex and brute-forcing is not practical. For this, you need to add a public SSH key on a server that can only be decrypted by a “private key” which is available only to the intended recipient.
Enable Sudo Access
Every Linux VPS possess the username as “root” in default. This encourages hackers to crack the password by attempting brute force attacks. In order to defend from such security threats, you need to deactivate the root login option and create another username. To execute root level commands, you should use “sudo” command and It is always advisable to create unique user accounts for each user and service on your Linux VPS. Each user should be set with the required permissions and privileges in order to complete their task and the rest of the permissions and privileges should be kept inaccessible. Ensure that you disable all unnecessary user accounts who no longer need access to your system.
Replace FTP With SFTP
FTP is a protocol that is inherently insecure and is vulnerable to packet sniffing. SFTP is “FTP over SSH” otherwise known as “secure FTP”. SFTP encrypts all the data which includes the files that are being transferred and credentials.
Security Patching is an important task in securing your Linux VPS. Outdated systems may have security holes and are vulnerable to intrusion attacks. Hence, Security updates are released on a regular basis to prevent hackers from intruding into your servers. Hence, ensure that you make use of the available package management tools to keep your system up-to-date.
Partition Your Disk
In order to keep operating system files away from third-party programs, user files, and tmp files you need to partition your disk. For added security, you can also disable “nosuid” and “noexec” on the operating system partition.
Install Intrusion Detection Systems
You can effectively detect suspicious activities such as DoS attacks and port scans by installing intrusion detection systems which are available in the market in bulk. Some of the popular intrusion detection systems are RKHunter, Bro, Psad, Aide etc. They monitor and analyze the internals of a computing application.
Hopefully, this article has managed to acquaint you with the general security practices to ensure your Linux VPS is shielded from malicious attacks. Since you are in charge of your server’s security, guarantee you stay cautious against some the most widely recognized security threats. Even though securing Linux VPS servers is a tedious task which invests a lot of time and effort, it is an essential part of server administration. To stay ahead of hackers keep auditing and evaluating your system and the solutions continuously.
With the ongoing technological evolution, choosing the best architecture for your business is extremely important as it will improve the growth and development of your company through simplified management, reducing cost, improving efficiency and protecting your data. Whether it is a small, medium or large enterprise, the right business infrastructure can only be gained by an excellent teamwork and management. The business infrastructure joins hand with resources, services, and technology to achieve strategic goals through planned processes and systems. Based on the mode of the business process one can choose Traditional or Converged or Hyper-Converged Infrastructure.
Since infrastructure is an integral part to enhance your business leads, this article emphases a clear idea about the differences between the above said infrastructure solutions, which ultimately helps you to choose the right infrastructure for your business.
A traditional infrastructure is the combination of individual units namely networking, backup tools, storage and application servers. These individual units are interlinked to each other and, they are configured and managed individually. There are chances that each individual unit is brought forth from different vendors, which in turn raises the necessity of IT experts specialized in a different field to manage and to offer support to each unit.
Unlike traditional infrastructure, converged infrastructure is a pre-configured product stack where storage, networking, and application servers are sold as a single ready-to-use solution. However, converged infrastructure offers a limited flexibility to adapt to workload and each appliance in the converged stack should be managed separately in some cases.
Hyper-converged infrastructure is becoming increasingly popular as different units which include networking, storage, backup are combined into a single unit. These single units are purchased from a single vendor and the management of these units is centralized. Comparing the traditional and converged infrastructure, configuration of the whole solution takes less time in the hyper-converged infrastructure as it integrates all the technology. This infrastructure enables easy deployment and management of virtual machines and software layer gain flexibility while utilizing hardware resources.
Which One To Choose For Your Business?
The traditional infrastructure manages each unit individually and it requires a full-fledged large team of experts to handle each unit with utmost care. Even though in converged infrastructure, each element should be managed individually and requires a lot of control, it is a good choice for large enterprises as it eliminates the need of purchasing each component separately. In contrast to the traditional and converged infrastructure, hyper-converged infrastructure offers simplified management, financially savvy solution with an increased efficiency and agility. They can be deployed faster with high data protection.
Right before making a choice of infrastructure for your business, it is necessary to take an account of your business size and business needs. Traditional infrastructure will work for businesses that possess huge data centers and multi-national companies that handle huge deployments. It requires multiple tools and team to ensure high performance. They are a bit expensive in terms of hardware investments. In a case, where your business requires traditional infrastructure, yet you can choose a converged infrastructure if you are required to handle the deployment from scratch. Converged infrastructure reduces the cost of huge hardware investments from different vendors.
Hyper-converged infrastructure stack up against traditional and converged infrastructure when considering the key functions. This suits business which requires fast deployment and quick access to resources. A centralized too provides end-to-end storage and networking ability. The inbuilt tools possess the capability of replacing data or hardware when needed. Overall hyper-converged infrastructure is easy to implement, manage and maintain in a financially savvy budget.
If your business requires simplified delivery of private cloud/IT resources, then hyper-converged infrastructure serves this purpose with its API-driven approach. Converged or traditional infrastructure suits when your business requires a hardware-focused approach with flexible deployment and customization.
To conclude, there is certifiably not a one-measure fits-all approach with regards to picking an appropriate technology for your business as it should be lined up with your business strategy and goals. Ensure that you picking an infrastructure that empowers your business results to be sustained and convey more prominent consumer loyalty.