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CentOS 7.0 - man page for radtest (centos section 1)

RADTEST(1)							 FreeRADIUS Daemon							RADTEST(1)

radtest - send packets to a RADIUS server, show reply
radtest [-d raddb_directory] [-t pap/chap/mschap] [-x ] [-4 ] [-6 ] user password radius-server nas-port-number secret [ppphint] [nasname]
radtest is a frontend to radclient(1). It generates a list of attribute/value pairs based on the command line arguments, and feeds these into radclient. It's a fast and convenient way to test a radius server.
-d raddb_directory The directory that contains the RADIUS dictionary files. Defaults to /etc/raddb. -t pap/chap/mschap/eap-md5 Choose the authentiction method to use. e.g. "-t pap", "-t chap", "-t mschap", or "-t eap-md5",. Defaults to "pap". Using EAP-MD5 requires that the "radeapclient" program is installed. -x Enables debugging output for the RADIUS client. -4 Use NAS-IP-Address for the NAS address (default) -6 Use NAS-IPv6-Address for the NAS address (default) user Username to send. password Password of the user. radius-server Hostname or IP address of the radius server. Optionally, you may specify a port by appending :port nas-port-number The value of the NAS-Port attribute. Is an integer between 0 and 2^31, and it really doesn't matter what you put here. 10 will do fine. secret The shared secret for this client. ppphint If you put an integer > 0 here, radtest (or actually radclient) will add the attribute Framed-Protocol = PPP to the request packet. nasname If present, this will be resolved to an IP address and added to the request packet as the NAS-IP-Address attribute. If you don't specify it, the local hostname of the system will be used.
radiusd(8), radclient(1).
Miquel van Smoorenburg, 5 April 2010 RADTEST(1)