IPIP.NET

Example result

IP in URI

curl localhost:9527/114.114.114.114
114DNS  114DNS          %

Client IP

curl localhost:9527
本机地址        本机地址                %

Example config

server {
    listen 9527;
    server_name _;
    location / {
        ipip_file /path/to/ipip_db.dat;
    }
}