Ubuntu Manpage: radclient - send packets to a RADIUS server, show reply

Provided by: freeradius-common_3.0.16+dfsg-1ubuntu3.2_all

NAME

       radclient - send packets to a RADIUS server, show reply

SYNOPSIS

       radclient  [-4]  [-6]  [-c count] [-d raddb_directory] [-D dictionary_directory] [-f file]
       [-F] [-h] [-i id] [-n  num_requests_per_second]  [-p  num_requests_in_parallel]  [-q]  [-r
       num_retries]    [-s]    [-S    shared_secret_file]   [-t   timeout]   [-v]   [-x]   server
       {acct|auth|status|disconnect|auto} secret

DESCRIPTION

       radclient is a radius client program. It can send arbitrary radius  packets  to  a  radius
       server, then shows the reply. It can be used to test changes you made in the configuration
       of the radius server, or it can be used to monitor if a radius server is up.

       radclient reads radius attribute/value pairs from  it  standard  input,  or  from  a  file
       specified  on  the  command  line.  It  then encodes these attribute/value pairs using the
       dictionary, and sends them to the remote server.

       The User-Password and CHAP-Password attributes  are  automatically  encrypted  before  the
       packet is sent to the server.

OPTIONS

-4 Use IPv4 (default)

-6 Use IPv6

-c count
Send each packet count times.

-d raddb_directory
The directory that contains the user dictionary file. Defaults to
/etc/freeradius/3.0.

-D dictionary_directory
The directory that contains the main dictionary file. Defaults to
/usr/share/freeradius.

-f file[:file]
File to read the attribute/value pairs from. If this is not specified, they are
read from stdin. This option can be specified multiple times, in which case
packets are sent in order by file, and within each file, by first packet to last
packet. A blank line separates logical packets within a file. If a pair of files
separated by a colon is specified, the second file will be used to filter the
responses to requests from the first. The number of requests and filters must be
the same. A summary of filter results will be displayed if -s is passed.

-F Print the file name, packet number and reply code.

-h Print usage help information.

-i id Use id as the RADIUS request Id.

-n num_requests_per_second
Try to send num_requests_per_second, evenly spaced. This option allows you to slow
down the rate at which radclient sends requests. When not using -n, the default is
to send packets as quickly as possible, with no inter-packet delays.

Due to limitations in radclient, this option does not accurately send the requested
number of packets per second.

-p num_requests_in_parallel
Send num_requests_in_parallel, without waiting for a response for each one. By
default, radclient sends the first request it has read, waits for the response, and
once the response is received, sends the second request in its list. This option
allows you to send many requests at simultaneously. Once num_requests_in_parallel
are sent, radclient waits for all of the responses to arrive (or for the requests
to time out), before sending any more packets.

This option permits you to discover the maximum load accepted by a RADIUS server.

-P proto
Use proto transport protocol ("tcp" or "udp"). Only available if FreeRADIUS is
compiled with TCP transport support.

-q Go to quiet mode, and do not print out anything.

-r num_retries
Try to send each packet num_retries times, before giving up on it. The default is
10.

-s Print out some summaries of packets sent and received.

-S shared_secret_file
Rather than reading the shared secret from the command-line (where it can be seen
by others on the local system), read it instead from shared_secret_file.

-t timeout
Wait timeout seconds before deciding that the NAS has not responded to a request,
and re-sending the packet. The default timeout is 3.

-v Print out version information.

-x Print out debugging information.

server[:port]
The hostname or IP address of the remote server. Optionally a UDP port can be
specified. If no UDP port is specified, it is looked up in /etc/services. The
service name looked for is radacct for accounting packets, and radius for all other
requests. If a service is not found in /etc/services, 1813 and 1812 are used
respectively.

If a host name is specified, then radclient will do a DNS lookup, and use the A
record to find the IP address of the RADIUS server. If there is no A record, then
radclient will look for an AAAA record. If there is no AAAA record, an error will
be produced.

IPv6 addresses may be specified by surrounding it in square brackets. For example,
[2002:c000:0201:0:0:0:0:0], or with a port, [2002:c000:0201:0:0:0:0:0]:18120.

The RADIUS attributes read by radclient can contain the special attribute Packet-
Dst-IP-Address. If this attribute exists, then that IP address is where the packet
is sent, and the server specified on the command-line is ignored.

If the RADIUS attribute list always contains the Packet-Dst-IP-Address attribute,
then the server parameter can be given as -.

The RADIUS attributes read by radclient can contain the special attribute Packet-
Dst-Port. If this attribute exists, then that UDP port is where the packet is
sent, and the :port specified on the command-line is ignored.

acct | auth | status | disconnect | auto
Use auth to send an authentication packet (Access-Request), acct to send an
accounting packet (Accounting-Request), status to send an status packet (Status-
Server), or disconnect to send a disconnection request. Instead of these values,
you can also use a decimal code here. For example, code 12 is also Status-Server.

The RADIUS attributes read by radclient can contain the special attribute Packet-
Type. If this attribute exists, then that type of packet is sent, and the type
specified on the command-line is ignored.

If the RADIUS attribute list always contains the Packet-Type attribute, then the
type parameter can be given as auto.

secret The shared secret for this client. It needs to be defined on the radius server
side too, for the IP address you are sending the radius packets from.

EXAMPLE

       A sample session that queries the remote server for Status-Server (not all servers support
       this, but FreeRADIUS has configurable support for it).

              $ echo "Message-Authenticator = 0x00" | radclient 192.0.2.42 status s3cr3t
              Sending request to server 192.0.2.42, port 1812.
              radrecv: Packet from host 192.0.2.42 code=2, id=140, length=54
                  Reply-Message = "FreeRADIUS up 21 days, 02:05"

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