2 20.11. RADIUS Authentication #
4 This authentication method operates similarly to password except that
5 it uses RADIUS as the password verification method. RADIUS is used only
6 to validate the user name/password pairs. Therefore the user must
7 already exist in the database before RADIUS can be used for
10 When using RADIUS authentication, an Access Request message will be
11 sent to the configured RADIUS server. This request will be of type
12 Authenticate Only, and include parameters for user name, password
13 (encrypted) and NAS Identifier. The request will be encrypted using a
14 secret shared with the server. The RADIUS server will respond to this
15 request with either Access Accept or Access Reject. There is no support
16 for RADIUS accounting.
18 Multiple RADIUS servers can be specified, in which case they will be
19 tried sequentially. If a negative response is received from a server,
20 the authentication will fail. If no response is received, the next
21 server in the list will be tried. To specify multiple servers, separate
22 the server names with commas and surround the list with double quotes.
23 If multiple servers are specified, the other RADIUS options can also be
24 given as comma-separated lists, to provide individual values for each
25 server. They can also be specified as a single value, in which case
26 that value will apply to all servers.
28 The following configuration options are supported for RADIUS:
31 The DNS names or IP addresses of the RADIUS servers to connect
32 to. This parameter is required.
35 The shared secrets used when talking securely to the RADIUS
36 servers. This must have exactly the same value on the PostgreSQL
37 and RADIUS servers. It is recommended that this be a string of
38 at least 16 characters. This parameter is required.
42 The encryption vector used will only be cryptographically strong
43 if PostgreSQL is built with support for OpenSSL. In other cases,
44 the transmission to the RADIUS server should only be considered
45 obfuscated, not secured, and external security measures should
46 be applied if necessary.
49 The port numbers to connect to on the RADIUS servers. If no port
50 is specified, the default RADIUS port (1812) will be used.
53 The strings to be used as NAS Identifier in the RADIUS requests.
54 This parameter can be used, for example, to identify which
55 database cluster the user is attempting to connect to, which can
56 be useful for policy matching on the RADIUS server. If no
57 identifier is specified, the default postgresql will be used.
59 If it is necessary to have a comma or whitespace in a RADIUS parameter
60 value, that can be done by putting double quotes around the value, but
61 it is tedious because two layers of double-quoting are now required. An
62 example of putting whitespace into RADIUS secret strings is:
63 host ... radius radiusservers="server1,server2" radiussecrets="""secret one"",""