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Virtual server security

Virtual server security

When it comes to Virtual machines and server security, there are some questions that we have to answer. These are:

  • How to increase the security of the virtual server?
  • What steps should we take to increase the security of the virtual server?

Security has always been one of the concerns that have occupied the minds of large and small companies. Therefore, measures must be taken to increase security. Because personal and financial information of individuals and websites may be affected by cyber-attacks at any time. Moreover, these measures include increasing the security of virtual hosts and servers, and websites. In this post, we have tried to provide you with ways to make the virtual server secure. Stay with us.

Increase virtual server security

SSH security protocol

SSH is a security protocol for encrypting information and communicating with the server. Moreover, the SSH protocol can be used as a slogin of communication methods(used to establish secure communication in Unix systems), SSH(To move Unix Base commands) and, SCP(to secure copying files). Hackers can brutally attack each of these methods. In addition, these attacks are carried out through SSH passwords. The following methods can be used to secure SSH:

  • Change the default port: One of the security problems is using the default port and it helps hackers to easily infiltrate your server. So as soon as possible change the default SSH port from 22 to the desired value by editing the / etc / ssh / sshd_config file. Additionally, before that, you need to add your desired port to the firewall so that you do not encounter any problems when re-entering SSH.
  • Disable the old SSH: SSH uses protocols of which SSH 1 is one of the oldest protocols. As a result, set the protocol value to 2 via the / etc / ssh / sshd_config path.
  • Disable root: To increase the security of the virtual server, you must disable root. To do this in the SSH file settings, add PermitRootLogin no.
  • Restrict IP SSH port access to block hackers
  • Use a strong password for SSH: Create a strong password with letters and symbols to maintain and increase the level of security.

Latest software version

The older the version of your server software, the more vulnerable it will be. So with a few simple clicks, you can make the relevant updates. It also makes your job easier by setting up automatic updates. For this, you can use apt-get for Debian and Ubuntu or yum / rpm for CentOS.

Virtual server login monitoring

You can control what happens on your server by managing server logs. Moreover, when you see events, resource usage, traffic levels, user activity, and errors, you can quickly fix them to increase the security of your virtual server.

Set up a firewall

Definitely, no one wants unwanted traffic! As a result, the firewall will be an effective issue. Most Linux-based operating systems have pre-installed firewalls. Moreover, for easy iptables management and integration with other control panels, you can install a free ConfigServer firewall called CSF. If you are looking for more security you can add ModSecurity to the firewall to track HTTP traffic, code changes, and database. Having a firewall will have advantages, including:

  • Prevent hackers and malware from entering
  • Blocking some IPs and allowing access to certain IPs

Make sure your server is protected against malware

In addition to setting up a firewall that protects incoming traffic, you should also monitor files that are running and running on the VPS. That’s why you need anti-virus software to detect and manage suspicious activity and unwanted files. Fortunately, there are many anti-malware programs, the most popular of which are ClamAV and CXS.

Make a backup and use it

Always try to make a backup copy of your server continuously and at specified intervals so that you can use it in case of any problems.

Using SSL certificate

SSL certificates help you create an encrypted channel between the server and the client to protect your privacy. The SSL certificate is important for securing data for any hosting, whether sending a file, sending an email, or entering login details.

Controlling user access

In order to increase the security of your virtual server, it is better to restrict access to access. In other words, your server may be available to many users. To prevent them from affecting resources and protecting sensitive data, you should limit access to the server. . To do this, look for file systems such as CageFS (CloudLinux) or VirtFS.


No matter what kind of hosting you use for your website, such as a virtual server with a dedicated server, security should always be on your mind, including creating strong passwords, 2FA authentication, and not using unofficial software, and preventing attachments from being opened. Emails are sent by people you do not know.