SQL authentication freeradius server#

first, desclaimer. I use Ubuntu 24.04.2 LTS that running on Archlinux qemu host. so this is not host machine. big thanks for linux netdev that makes local networking possible.

first, lets configure postgresql server

root@integral2:/home/fadhil_riyanto# su postgres
postgres@integral2:/home/fadhil_riyanto$ psql
psql (16.9 (Ubuntu 16.9-0ubuntu0.24.04.1))
Type "help" for help.

postgres=#

database setup#

get it inside. then run

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do not forget to allow CRUD option on all tables by running

\c radius
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO radius;

radius server configuration#

the sequence of config file

  • /etc/freeradius/3.0/clients.conf <– specify ‘who’ can connect, we need define it in this file

  • /etc/freeradius/3.0/users <– [manual authentication, using file]

  • /etc/freeradius/3.0/radiusd.conf:986 <– this file enable sql module.

  • /etc/freeradius/3.0/mods-available/sql <– this file is where we configure user/pass for sql module

  • /etc/freeradius/3.0/sites-available/default <– sequence layer of login,

    • first, we filter-out all args

    • then go to preprocess

    • send to log

    • chap & mschap

    • check whatever has digest

    • check whatever user@domain format

    • eap

    • files

    • lookup to sql <– uncomment this

as root

  • /etc/freeradius/3.0/mods-enabled

  • ln -s ../mods-available/sql ./sql

  • uncomment this line in radiusd.conf image

  • change this line to postgresql (mods-enabled/sql) image

also image

  • fill the pgsql server credentials (/etc/freeradius/3.0/mods-config/sql/main/postgresql/queries.conf) (aka raddb/sql/database/dialup.conf in rhel)

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when connection failed#

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when connection succeed#

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populating#

best read: https://wiki.freeradius.org/guide/SQL-HOWTO#populating-sql

big thanks for freeradius developer, the sql file is located at /etc/freeradius/3.0/mods-config/sql/main/postgresql/schema.sql

import it with:

psql -U radius -d radius -f /etc/freeradius/3.0/mods-config/sql/main/postgresql/schema.sql

configuration#

lets look at sites-available/default

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this configuration only allow authorize users that come from NAS-Port-Type == “Wireless-802.11”, this is the difference

footage 1: from winbox request image

this one come from captive portal image