Security Protection after LOG analysis is installed

Security Precaution after LOG analysis is installed-Linux Enterprise Application-Linux server application information. The following is a detailed description. The more suites are installed on the firewall, the lower the system security. There are two ways to improve the system security:
1. Set up apache and mysql on a machine on the internal network, and install only the mysql client on the firewall. This prevents hackers from exploiting apache and mysql vulnerabilities.
2. setting rules on the firewall only allows connections from internal networks for HTTP and MySql. This method is simple. This method is also used in the iptables example described in this article, the disadvantage is that you cannot view the LOG analysis results out of school.