8 Tips to Keep Your Linux System Secured
You might have read or heard the line that my system or computer does not get a virus because it runs on Linux.
Do you believe it?
If yes, let me have the privilege of unveiling the reality to you. It is no more than a myth.
No other operating system can beat Linux on the security options, but this does not imply that it is shielded from any of the security issues.
How it stands poles apart from the rest of the OS and servers?
The key reason behind it is that it falls under the category of least targeted. But still, the data, intellectual property, and time are to be saved from the hackers. To achieve this, all you need to do is to practice the tips and tricks and secure your Linux server from any sort of risks and vulnerabilities.
1. Data Communication Encryption-
Any message you send, any song you share with someone is open to monitoring. Yes, but it can be controlled with the help of the concept of encryption.
Use passwords or use keys and certificates to protect your data.
How to do it?
• Use virtual private network, lightweight SSL VPN. You can also use tunnelling for the security of the private network.
• For transferring file, you can shield your data by using rsync, or sftp.
• Mounting remote server files system is also an option
2. Get habitual of limited software-
Flooding the computer system with all sorts of web services is one of the common mistakes we all do. Minimize the software number to protect your data from vulnerabilities.
What to do?
Delete all the unwanted set of packages and use RPM package manager to have an idea of the number of the set of software packages on your system.
3. Keep your system away from Telnet, FTP and Rlogin-
The critical problem with the use of the FTP, Telnet, or other related commands is there capturing by someone using a packet sniffer.
What to do?
Use any from the following-
FTPS, SFTP or OpenSSH
How would they be beneficial?
These common solutions will help in adding SSL or TLS encryption to FTP.
4. Avoid running outdated Linux Kernel and Software-
Linux itself helps its users in keeping the server up to date through its upgrade versions. Make sure you upgrade the system to apply security patches without wasting any time.
What can you do?
Incorporate RPM package manager is your usage. For example, apt-get, yum, Red Hat, Fedora etc.
5. Use Linux Security Extensions-
To safeguard your Linux system from compromised or misconfigured programs, use Linux security or SELinux.
How is it helpful?
SELinux program protects the Linux kernel with the help of security policies. Also, it provides MAC (Mandatory Access Control). It aids in protecting the system from flawed applications destroying the system.
6. Use a strong password-
For the creation and the maintenance of the user accounts, use usermod/ useradd commands. For this, you need to have a strong password policy.
What should you do to strengthen your password?
Use at least 8 characters, and it must be a mixture of numbers, special character, alphabets, lower& upper alphabets.
Restrict the use of the previously used passwords.
7. Root Login should be inactivated-
Make sure you never log in as the root user. Every time you need the implementation of the root level commands, you can use Sudo for it. It allows auditing and tracking features along with increasing the security of the system.
8. Enable Firewall-
One of the most flexible firewall utilities for the Linux system is Iptables. The main disadvantage of using this firewall is that it comes with CLI, command line interface. The experts can still make the best use but not the beginners.
GUI is the alternative to this. Under this, the availabilities are Firestarter and Gufw.
What’s the primary benefit of using it?
• Easy and quick firewall configuration
• Hassle removal made easy
Follow these 8 tips to safeguard your Linux system and face no security issues.a