Преобразование sql-запроса в Laravel Eloquent. SQL to Laravel Eloquent

SELECT p.id,p.ip,p.port FROM proxies p
    JOIN ( SELECT RAND() * (SELECT MAX(id) FROM proxies) AS max_id ) AS m
    WHERE p.id >= m.max_id
    ORDER BY p.id ASC
    LIMIT 10;

Не ясен до конца момент с Join