Hi Community. I spent about two hours to figure out following problem: although my configuration was correct, freeradius didn't connect with my postgres database. following error was logged: Info: rlm_sql (sql): Attempting to connect to radius@127.0.0.1:5432/radius Info: rlm_sql (sql): Attempting to connect rlm_sql_postgresql #0 Error: rlm_sql_postgresql: Couldn't connect socket to PostgreSQL server radius@127.0.0.1:radius Error: rlm_sql (sql): Failed to connect DB handle #0 after searching for (not existent) configuration failures i looked into the postgres log. (wow, what for an idea!) There was an entry: CEST LOG: could not accept SSL connection: EOF detected Postgres was configured to work over SSL. Freeradius does not seem to support Postgres over SSL. I deactivated SSL in Postgres and the freeradius server connected. Because no such info seems to exist in Internet, i decided to write it into this list. greetings...