Solution for enhancing the security of Linux/Unix server systems

As we all know, network security is a very important topic, and servers are the most critical link in network security. Linux is considered to be a safer Internet server. As an open-source operating system, once a security vulnerability is found in Linux, volunteers from around the world on the Internet will actively fix it. However, system administrators often cannot obtain and correct information in a timely manner, which gives hackers an opportunity. However, compared with the security vulnerabilities of these systems, more security problems are caused by improper configuration and can be prevented by appropriate configuration. The more services run on the server, the more opportunities for improper configuration, and the greater the possibility of security problems. This article introduces how to enhance the security of Linux/Unix servers.
1. system security record files

Recording files in the operating system are important clues for detecting network intrusion. If your system is directly connected to the Internet, you find that many people try to Telnet or FTP your system, you can run "# more/var/log/secure grep refused" to check the system for attacks, so as to take corresponding countermeasures, such as replacing Telnet/rlogin with SSH.

1 2 3 Next Page

[Content navigation]
Page 1: Overview, system security record files	Page 1: startup and login security
Page 1: restrict network access