Careless protection of important corporate data can turn into a real disaster for a VPS server tenant. An intruder who has managed to break through the configured security methods can introduce extraneous scripts into the site structure, interfering with the normal operation of the infrastructure, and can even steal the data stored on the server in order to resell it or use it in another unfair way.
In this article we'll tell you:
We'll try to address each of these questions in a comprehensive way.
There are a number of signs indicating the presence of third-party connections:
Most often, the anomalous activity is monitored at the level of incoming and outgoing traffic - if a virtual or dedicated server is exchanging data packets with some strange resources when it should not - this is a sure sign of hacking. As a rule, the main reason for hacking are vulnerabilities in the server software or in the code of the site. This may also include improper configuration of access rights, use of unreliable passwords, incorrect configuration of the installed software, etc.
Consider all the most effective and simple ways to protect VPS and dedicated servers:
Let's talk separately about the most effective method - SSH protection.
SSH is an acronym that stands for Secure Shell. It is an extremely popular application-layer network protocol that provides secure, encrypted connections for a variety of purposes, from authentication to executing remote commands on a server without going through manual authorization. Essentially, SSH is a better and more advanced counterpart to Telnet, FTP, RSH, and other similar protocols.
Unlike the obsolete protocols, SSH does not send information in clear text, so it eliminates the most important vulnerability of the "man in the middle" category. An attacker accessing an intermediate subnet has the ability to intercept server data packets in order to save them and then send them to the addressee. Even worse, he might overwrite the packets by replacing ls -la mydir with rm -r mydir, or even send a Trojan-infected file instead of the original one. In general, there can be many different tricks and scenarios.
SSH verifies the authenticity of the host through verification so there is no way to read data packets or do anything else with them when using this protocol. If the connection passes, it is completely secure from start to finish.
To ensure the full security of your Dedicated Server or VPS, SSH keys must be protected. It can be done in the following ways:
Basically, these four methods are more than enough to secure your SSH keys and, as a result, to stop any VPS attacks on your network infrastructure. Use it!