Hello, I have FreeRADIUS Version 3.0.17 is installed that comes by default with Debian 10. When Freeradius is trying to connect to a remote MySQL 8.0 server, I get this error: rlm_sql_mysql: libmysql version: 10.3.27 mysql { tls { } warnings = "auto" } rlm_sql (sql): Attempting to connect to database "rad_db" rlm_sql (sql): Initialising connection pool pool { start = 5 min = 3 max = 32 spare = 10 uses = 0 lifetime = 0 cleanup_interval = 30 idle_timeout = 60 retry_delay = 30 spread = no } rlm_sql (sql): Opening additional connection (0), 1 of 32 pending slots used rlm_sql_mysql: Starting connect to MySQL server rlm_sql_mysql: Couldn't connect to MySQL server myuser@18.133.xxx.xxx:rad_db rlm_sql_mysql: MySQL error: Plugin caching_sha2_password could not be loaded: /usr/lib/x86_64-linux-gnu/mariadb19/plugin/caching_sha2_password.so: cannot open shared object file: No such file or directory rlm_sql_mysql: Socket destructor called, closing socket rlm_sql (sql): Opening connection failed (0) rlm_sql (sql): Removing connection pool /etc/freeradius/3.0/mods-enabled/sql[20]: Instantiation failed for module "sql" Debian buster doesn't come with MySQL 8.0. So I have installed it manually: MYSQL_8_file="mysql-apt-config_0.8.16-1_all.deb" apt install gnupg -y wget -c https://dev.mysql.com/get/${MYSQL_8_file} dpkg -i ${MYSQL_8_file} apt update apt install mysql-client libmysqlclient-dev The error message indicated that FreeRadius is looking for mariadb plugins. I checked and there is no caching_sha2_password.so in the path /usr/lib/x86_64-linux-gnu/mariadb19/plugin/. Any suggestions, please?