Do you use gateway/bastion servers to connect to the company's infrastructure via SSH? Secure them better.

The article discusses key practices for hardening SSH bastion servers from security threats. SSH, or Secure Shell, is a protocol that allows remote login and management of servers, but it can be vulnerable to various attacks without proper security measures in place. The first part of the article emphasizes the importance of a layered security approach. Users should implement multi-factor authentication, significantly increasing the difficulty for unauthorized individuals to gain access. Strong passwords and limiting the number of login attempts are also critical steps that should be taken to bolster security.

Another essential aspect highlighted is the use of firewalls and VPNs. A firewall helps block unauthorized traffic, safeguarding the server from potential attacks coming from the outside. On the other hand, VPN usage allows secure connections to the server, making SSH access more controlled. Limiting SSH access to trusted IP addresses is also a key step towards enhancing security.

The article also discusses the importance of regular updates and system monitoring. Installing the latest security patches should become a routine task for every server administrator. Monitoring system logs enables the detection of unauthorized login attempts or other suspicious activities, allowing for a quick response to any security threats.

Additionally, there are details on SSH server configuration. Proper settings in the SSH configuration file, such as changing the default service port or disabling password-based logins, can significantly enhance security levels. Using public keys instead of passwords is also recommended to further protect against potential attacks.

In summary, the article provides valuable insights into securing SSH bastion servers. These methods help minimize the risk of incidents related to server access by applying multiple layers of protection. Security is an ongoing effort and requires adaptation to changing threats, so every server administrator should be aware of these practices.