Steps: 3311 Request Control > cloud_ip Module > Target Rejection > Check Non
http://github.itzmx.com/1265578519/kangle/master/ipip/china_ip_list.txt
Fill in flush_time (second) as 1296000, update the IP database once every two weeks, IPIP generally updates the database once a month, so it is best to update it once every two weeks.
In this way, accessing from overseas IPs will prompt a 403 status unable to access, similarly, if non is not checked, then it will reject domestic IP access.
Here ipip is recommended, the tutorial also uses ipip, after all, the accuracy is high.
IPIP database free project address: https://github.com/17mon/china_ip_list
anrip database project address: https://github.com/anrip/IpAreaRoute