405
• The Authenticator field (16 bytes long) is used to authenticate replies from the RADIUS server and to
encrypt user passwords. There are two types of authenticators: request authenticator and response
authenticator.
• The Attributes field, variable in length, carries the specific authentication, authorization, and
accounting information that defines the configuration details of the request or response. This field
may contain multiple attributes, each with three sub-fields:
{ Type—(1 byte long) Type of the attribute. It is in the range 1 to 255. Commonly used RADIUS
attributes are defined in RFC 2865, RFC 2866, RFC 2867, and RFC 2868. Table 120 sh
ows a
list of the attributes.
{ Length—(1 byte long) Length of the attribute in bytes, including the Type, Length, and Value
sub-fields.
{ Value—(Up to 253 bytes) Value of the attribute. Its format and content depend on the Type and
Length sub-fields.
Table 120 Commonly used RADIUS attributes
No. Attribute No.
Attribute
1 User-Name 45 Acct-Authentic
2 User-Password 46 Acct-Session-Time
3 CHAP-Password 47 Acct-Input-Packets
4 NAS-IP-Address 48 Acct-Output-Packets
5 NAS-Port 49 Acct-Terminate-Cause
6 Service-Type 50 Acct-Multi-Session-Id
7 Framed-Protocol 51 Acct-Link-Count
8 Framed-IP-Address 52 Acct-Input-Gigawords
9 Framed-IP-Netmask 53 Acct-Output-Gigawords
10 Framed-Routing 54 (unassigned)
11 Filter-ID 55 Event-Timestamp
12 Framed-MTU 56-59 (unassigned)
13 Framed-Compression 60 CHAP-Challenge
14 Login-IP-Host 61 NAS-Port-Type
15 Login-Service 62 Port-Limit
16 Login-TCP-Port 63 Login-LAT-Port
17 (unassigned) 64 Tunnel-Type
18 Reply_Message 65 Tunnel-Medium-Type
19 Callback-Number 66 Tunnel-Client-Endpoint
20 Callback-ID 67 Tunnel-Server-Endpoint
21 (unassigned) 68 Acct-Tunnel-Connection
22 Framed-Route 69 Tunnel-Password
23 Framed-IPX-Network 70 ARAP-Password
24 State 71 ARAP-Features
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