https://tlcheng.wordpress.com/2022/12/01/routeros-%e5%bb%ba%e7%ab%8b%e4%b8%80%e4%b8%bb%e4%ba%8c%e5%be%9e%e7%9a%84-ipsec-%e9%80%9a%e9%81%93/
[RouterOS] 建立一主二從的 IPsec 通道