How to Secure A Linux VPS?
Tags: linux, vps, security
Published: 2023-07-14 12:37:38

Hacking has evolved into a thriving enterprise. It doesn't matter who you are or what you're engaged in; you're already marked as a potential victim.

While news stories tend to sensationalize major cyberattacks, the truth is that numerous websites suffer hacking incidents on a daily basis, causing substantial harm to businesses. 

Fortunately, you can decrease your vulnerability to hacking without needing to be a cybersecurity expert. The key is to make yourself a more challenging target compared to others. 

If you're already using a Linux VPS, you have an advantage as Linux's Security Model (LSM) provides enhanced overall security compared to operating systems like Windows.

Although starting with a Linux VPS is commendable, it's important to note that it doesn't guarantee invincibility against cyber threats.

Here are some of the ways that you can secure your Linux VPS against hackers:

## Tips to Secure a Linux VPS:

![Secure VPS](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/m1ocwox6xwbzjc06agc6.jpg)
### Invest in a Secure Hosting Provider
Securing a VPS is akin to constructing a house, where locking the door alone won't suffice if the foundation and walls are compromised. The host serves as the foundation, making it crucial to thoroughly research and evaluate potential hosts. 

Examining the product page and reviewing its security features is vital. Independent platforms like Trustpilot and Google Reviews can provide valuable insights. When in doubt or seeking specific information, it's advisable to directly contact the host and inquire about their security measures and technical support policies.

Most hosting providers will not give you complete information about their security features and what measures they follow to keep your server safe; however, going with a trustworthy company that offers secure <a href="https://www.kemuhost.com/vps-hosting" target="_blank">Linux VPS</a> makes a huge impact.

### Disabling Root Logins on the VPS
By default, the root user has unrestricted access to everything on a standard VPS, making it an enticing target for potential hackers. To mitigate this risk, one can create a new user and utilize the "sudo" command for executing root-level commands as needed. However, before disabling the root account, ensuring the appropriate access level for the new admin account is crucial.

In order to disable root access, it is necessary to modify the PermitRootLogin parameter in the sshd_config file to "No." This adjustment prevents the root user from logging into the server. While this step is a positive measure, further attention should be given to user-specific access levels. Tailoring access levels according to individual requirements is important; for instance, a web developer might not need root access, whereas a SysAdmin may require limited root-level commands.

### Disable Unused Ports:
[Securing your server](https://www.kemuhost.com/blog/server-security/) may seem technical, but I'll break it down for you in simple terms. Just like locking your doors and windows when leaving your house, closing unused ports on your server makes it more challenging for unauthorized access.

By default, your server may have open ports that are not actively used. Hackers exploit these open ports through a technique called port scanning, similar to how a burglar would survey a house. To maximize server security, it is recommended to create a list of used ports and close any unnecessary ones.

Before closing ports, it's important to consult with your developer as certain ports may be necessary for specific functionalities. You can use commands like netstat or ss to view all open ports and their associated services. Together with your developer, you can identify the ports that need to remain open and securely close any others.

### Ensuring Software Updates
Maintaining up-to-date software is equally vital for server security. Most software updates encompass minor changes alongside numerous crucial security patches. While keeping your software current may seem like a straightforward task, it can become complex when one update interferes with another application on your server. Skillful server administrators handle this challenge by enabling automatic updates for low-risk software while manually updating core software that may cause compatibility issues.

To be honest, staying on top of software and related updates can be a daunting task. However, it is crucial. Keeping your software up to date promptly addresses known vulnerabilities and helps prevent potential attacks. Delaying updates for too long can lead to disastrous consequences.

While it may feel like a nightmare to manage, prioritizing regular software updates is a fundamental step in safeguarding your server and mitigating risks.

## Conclusion:
In conclusion, you have now gained insight into the hidden aspects. You should have a clearer understanding of the risks associated with hosting valuable data on a VPS and the essential measures to fortify your server.

Security can be genuinely daunting, as evidenced by the frequent closure of businesses resulting from security breaches.

By reading this, you have taken the initial cautious steps towards safeguarding your VPS and ensuring the protection of yourself and your business. However, merely reading a blog post is insufficient. It is crucial to implement all the mentioned recommendations and continually strengthen and fortify your VPS.

As emphasized at the beginning, all your efforts will be in vain if you lack a solid foundation.