system_tools.sh_v2.2

【v2.2】 Twelfth Edition, Corrected the error in the script for creating new SSH firewall rules. The original script did not define a drop rule, which constitutes a critical functional flaw. Defining only allow rules without a corresponding drop rule renders the configuration meaningless. (2025.04.21 PM)

【v2.2】 第十二版，修正新建ssh防火墙规则脚本内容错误，原脚本没有定义丢弃规则，这属于严重功能错误，如果仅仅定义允许的规则，将毫无意义。（2025.04.21午）