HTTP/1.1 200 OK Date: Tue, 09 Apr 2002 06:55:24 GMT Server: Apache/1.3.20 (Unix) Last-Modified: Tue, 25 Jul 1995 22:00:00 GMT ETag: "304e95-8e71-30156960" Accept-Ranges: bytes Content-Length: 36465 Connection: close Content-Type: text/plain RADIUS Working Group C Rigney INTERNET-DRAFT Livingston expires in six months July 1995 RADIUS Accounting draft-ietf-radius-accounting-00.txt Status of this Memo This document is a submission to the RADIUS Working Group of the Internet Engineering Task Force (IETF). Comments should be submitted to the ietf-radius@livingston.com mailing list. Distribution of this memo is unlimited. This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ``work in progress.'' To learn the current status of any Internet-Draft, please check the ``1id-abstracts.txt'' listing contained in the Internet-Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or ftp.isi.edu (US West Coast). This document expires January 15th, 1996. Abstract This document describes a protocol for carrying accounting information between a Network Access Server and a shared Accounting Server. Rigney expires in six months [Page i] DRAFT RADIUS Accounting July 1995 Table of Contents 1. Introduction .......................................... 1 1.1 Specification of Requirements ................... 2 1.2 Terminology ..................................... 2 2. Operation ............................................. 3 3. Packet Format ......................................... 4 4. Packet Types .......................................... 6 4.1 Accounting-Request .............................. 6 4.2 Accounting-Response ............................. 7 5. Attributes ............................................ 9 5.1 Acct-Status-Type ................................ 10 5.2 Acct-Delay-Time ................................. 11 5.3 Acct-Input-Octets ............................... 12 5.4 Acct-Output-Octets .............................. 12 5.5 Acct-Session-Id ................................. 13 5.6 Acct-Authentic .................................. 14 5.7 Acct-Session-Time ............................... 15 5.8 Acct-Input-Packets .............................. 15 5.9 Acct-Output-Packets ............................. 16 5.10 Table of Attributes ............................. 17 Security Considerations ...................................... 19 References ................................................... 19 Acknowledgements ............................................. 19 Chair's Address .............................................. 20 Author's Address ............................................. 20 Rigney expires in six months [Page ii] DRAFT RADIUS Accounting July 1995 1. Introduction Managing dispersed serial line and modem pools for large numbers of users can create the need for significant administrative support. Since modem pools are by definition a link to the outside world, they require careful attention to security, authorization and accounting. This can be best achieved by managing a single "database" of users, which allows for authentication (verifying user name and password) as well as configuration information detailing the type of service to deliver to the user (that is, SLIP, PPP, telnet, rlogin). The RADIUS (Remote Authentication Dial In User Service) Internet- Draft specifies the RADIUS protocol used for Authentication and Authorization. This Internet-Draft extends the use of the RADIUS protocol to cover delivery of accounting information from the Network Access Server (NAS) to a RADIUS accounting server. Key features of RADIUS Accounting are: Client/Server Model A Network Access Server (NAS) operates as a client of the RADIUS accounting server. The client is responsible for passing user accounting information to a designated RADIUS accounting server. The RADIUS accounting server is responsible for receiving the accounting request and returning a response to the client indicating that it has successfully received the request. The RADIUS accounting server can act as a proxy client to other kinds of accounting servers. Network Security Transactions between the client and RADIUS accounting server are authenticated through the use of a shared secret, which is never sent over the network. Extensible Protocol All transactions are comprised of variable length Attribute- Length-Value 3-tuples. New attribute values can be added without disturbing existing implementations of the protocol. Source Code Availability Livingston Enterprises is making the C source code for an example Rigney expires in six months [Page 1] DRAFT RADIUS Accounting July 1995 RADIUS accounting server available without use restrictions. Other vendors have also implemented RADIUS Accounting. 1.1. Specification of Requirements In this document, several words are used to signify the requirements of the specification. These words are often capitalized. MUST This word, or the adjective "required", means that the definition is an absolute requirement of the specification. MUST NOT This phrase means that the definition is an absolute prohibition of the specification. SHOULD This word, or the adjective "recommended", means that there may exist valid reasons in particular circumstances to ignore this item, but the full implications must be understood and carefully weighed before choosing a different course. MAY This word, or the adjective "optional", means that this item is one of an allowed set of alternatives. An implementation which does not include this option MUST be prepared to interoperate with another implementation which does include the option. 1.2. Terminology This document uses the following term: silently discard This means the implementation discards the packet without further processing. The implementation SHOULD provide the capability of logging the error, including the contents of the silently discarded packet, and SHOULD record the event in a statistics counter. Rigney expires in six months [Page 2] DRAFT RADIUS Accounting July 1995 2. Operation When a client is configured to use RADIUS Accounting, at the start of service delivery it will generate an Accounting Start packet describing the type of service being delivered and the user it is being delivered to, and will send that to the RADIUS Accounting server, which will send back an acknowledgement that the packet has been received. At the end of service delivery the client will generate an Accounting Stop packet describing the type of service that was delivered and optionally statistics such as elapsed time, input and output octets, or input and output packets. It will send that to the RADIUS Accounting server, which will send back an acknowledgement that the packet has been received. The Accounting-Request (whether for Start or Stop) is submitted to the RADIUS accounting server via the network. If no response is returned within a length of time, the request is re-sent a number of times. After several failed attempts, the client can also forward requests to an alternate server in the event that the primary server is down or unreachable. It is recommended that the client continue attempting to send the Accounting packet until it receives an acknowledgement, using some form of backoff. It MAY elect to send the packet to an alternate accounting server. The nature of the timeout algorithms to be used are the topic of current research, and are not further specified here. The RADIUS accounting server MAY make requests of other servers in order to satisfy the request, in which case it acts as a client. If the RADIUS accounting server is unable to successfully record the accounting packet it MUST NOT send an Accounting-Response acknowledgment to the client. Rigney expires in six months [Page 3] DRAFT RADIUS Accounting July 1995 3. Packet Format Exactly one RADIUS Accounting packet is encapsulated in the UDP Data field [1], where the UDP Destination Port field indicates 1646. When a reply is generated, the source and destination ports are reversed. A summary of the RADIUS data format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Code | Identifier | Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | Authenticator | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Attributes ... +-+-+-+-+-+-+-+-+-+-+-+-+- Code The Code field is one octet, and identifies the type of RADIUS packet. When a packet is received with an invalid Code field, it is silently discarded. RADIUS Accounting Codes (decimal) are assigned as follows: 4 Accounting-Request 5 Accounting-Response Identifier The Identifier field is one octet, and aids in matching requests and replies. Length The Length field is two octets. It indicates the length of the packet including the Code, Identifier, Length, Authenticator and Attribute fields. Octets outside the range of the Length field should be treated as padding and should be ignored on reception. Rigney expires in six months [Page 4] DRAFT RADIUS Accounting July 1995 Authenticator The Authenticator field is sixteen (16) octets. The most significant octet is transmitted first. This value is used to authenticate the messages between the client and RADIUS accounting server. Request Authenticator In Accounting-Request Packets, the Authenticator value is a 16 octet MD5 [3] checksum. The NAS and RADIUS accounting server share a secret. The Authenticator field in Accounting-Request packets contains a one- way MD5 hash calculated over a stream of octets consisting of the Code + Identifier + Length + 16 zero octets + request attributes + shared secret (where + indicates concatenation). The 16 octet MD5 hash value is stored in the Authenticator field of the Accounting-Request packet. Note that the Request Authenticator of an Accounting-Request can not be done the same way as the Request Authenticator of a RADIUS Access-Request, because there is no User-Password attribute in an Accounting-Request. [Draft Note - the implementation of RADIUS Accounting in Livingston's ComOS 3.1 through 3.1.3 sets the Request Authenticator to all 0's. The next release will implement the method described here, after which this Note will be removed from the Draft.] Response Authenticator The Authenticator field in an Accounting-Response packet contains a one-way MD5 hash calculated over a stream of octets consisting of the Accounting-Response Code, Identifier, Length, the Authenticator field from the Accounting-Request packet being replied to, and the response attributes if any, followed by the shared secret. The resulting 16 octet MD5 hash value is stored in the Authenticator field of the Accounting-Response packet. Attributes Attributes may have multiple instances, in such a case the order of attributes of the same type SHOULD be preserved. The order of attributes of different types is not required to be preserved. Rigney expires in six months [Page 5] DRAFT RADIUS Accounting July 1995 4. Packet Types The RADIUS packet type is determined by the Code field in the first octet of the packet. 4.1. Accounting-Request Description Accounting-Request packets are sent from a client (typically a Network Access Server or its proxy) to a RADIUS accounting server, and convey information used to provide accounting for a service provided to a user. The client transmits a RADIUS packet with the Code field set to 4 (Accounting-Request). Upon receipt of an Accounting-Request, the server MUST transmit an Accounting-Response reply if it successfully records the accounting packet, and MUST NOT transmit any reply if it fails to record the accounting packet. Any attribute valid in a RADIUS Access-Request or Access-Accept packet is valid in a RADIUS Accounting-Request packet, except that the following attributes MUST NOT be present in an Accounting- Request: User-Password, CHAP-Password, Reply-Message, State. Either NAS-IP-Address or NAS-Identifier MUST be present in a RADIUS Accounting-Request. It SHOULD contain a NAS-Port attribute unless the service does not involve a port or the NAS does not distinguish among its ports. A summary of the Accounting-Request packet format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Code | Identifier | Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | Authenticator | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Attributes ... +-+-+-+-+-+-+-+-+-+-+-+-+- Rigney expires in six months [Page 6] DRAFT RADIUS Accounting July 1995 Code 4 for Accounting-Request. Identifier The Identifier field MUST be changed whenever the content of the Attributes field changes, and whenever a valid reply has been received for a previous request. For retransmissions where the contents are identical, the Identifier MUST remain unchanged. Note that if Acct-Delay-Time is included in the attributes of an Accounting-Request then the Acct-Delay-Time value will be updated when the packet is retransmitted, changing the content of the Attributes field and requiring a new Identifier and Request Authenticator. Authenticator The Authenticator of an Accounting-Request contains a 16-octet MD5 hash value calculated according to the method described in "Request Authenticator", above. [Draft Note - the implementation of RADIUS Accounting in Livingston's ComOS 3.1 through 3.1.3 sets the Request Authenticator to all 0's. The next release will implement the method described here, after which this Note will be removed from the Draft.] Attributes The Attributes field is variable in length, and contains a list of Attributes. 4.2. Accounting-Response Description Accounting-Response packets are sent by the RADIUS accounting server to the client to acknowledge that the Accounting-Request has been received and recorded successfully. If the Accounting-Request was recorded successfully then the RADIUS accounting server MUST transmit a packet with the Code field set to 5 (Accounting-Response). Rigney expires in six months [Page 7] DRAFT RADIUS Accounting July 1995 A RADIUS Accounting-Response is not required to have any attributes in it. On reception of an Accounting-Response by the client, the Identifier field is matched with a pending Accounting-Request. Invalid packets are silently discarded. A summary of the Accounting-Response packet format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Code | Identifier | Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | Authenticator | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Attributes ... +-+-+-+-+-+-+-+-+-+-+-+-+- Code 5 for Accounting-Response. Identifier The Identifier field is a copy of the Identifier field of the Accounting-Request which caused this Accounting-Response. Authenticator The Authenticator of an Accounting-Response contains a 16-octet MD5 hash value calculated according to the method described in "Response Authenticator", above. Attributes The Attributes field is variable in length, and contains a list of zero or more Attributes. Rigney expires in six months [Page 8] DRAFT RADIUS Accounting July 1995 5. Attributes RADIUS Attributes carry the specific authentication, authorization and accounting details for the request and response. Some attributes MAY be listed more than once. The effect of this is attribute specific, and is specified by each such attribute description. The end of the list of attributes is indicated by the length of the RADIUS packet. A summary of the attribute format is shown below. The fields are transmitted from left to right. 0 1 2 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Value ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type The Type field is one octet. Up-to-date values of the RADIUS Type field are specified in the most recent "Assigned Numbers" RFC [2]. Values 192-223 are reserved for experimental use, values 224-240 are reserved for implementation-specific use, and values 241-255 are reserved and should not be used. This specification concerns the following values: 1-39 Refer to RADIUS Internet-Draft 40 Acct-Status-Type 41 Acct-Delay-Time 42 Acct-Input-Octets 43 Acct-Output-Octets 44 Acct-Session-Id 45 Acct-Authentic 46 Acct-Session-Time 47 Acct-Input-Packets 48 Acct-Output-Packets Length The Length field is one octet, and indicates the length of this attribute including the Type, Length and Value fields. If an attribute is received in an Accounting-Request with an invalid Length, the entire request should be silently discarded. Rigney expires in six months [Page 9] DRAFT RADIUS Accounting July 1995 Value The Value field is zero or more octets and contains information specific to the attribute. The format and length of the Value field is determined by the Type and Length fields. The format of the value field is one of four data types. string 0-253 octets address 32 bit value, most significant octet first. integer 32 bit value, most significant octet first. time 32 bit value, most significant octet first -- seconds since 00:00:00 GMT, January 1, 1970. 5.1. Acct-Status-Type Description This attribute indicates whether this Accounting-Request marks the beginning of the user service (Start) or the end (Stop). A summary of the Acct-Status-Type attribute format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Value +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Value (cont) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type 40 for Acct-Status-Type. Length 6 Rigney expires in six months [Page 10] DRAFT RADIUS Accounting July 1995 Value The Value field is four octets. 1 Start 2 Stop 5.2. Acct-Delay-Time Description This attribute indicates how many seconds the client has been trying to send this record for, and can be subtracted from the time of arrival on the server to find the approximate time of the event generating this Accounting-Request. (Network transit time is ignored.) A summary of the Acct-Delay-Time attribute format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Value +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Value (cont) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type 41 for Acct-Delay-Time. Length 6 Value The Value field is four octets. Rigney expires in six months [Page 11] DRAFT RADIUS Accounting July 1995 5.3. Acct-Input-Octets Description This attribute indicates how many octets have been received from the port over the course of this service being provided, and can only be present in Accounting-Request records where the Acct- Status-Type is set to Stop. A summary of the Acct-Input-Octets attribute format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Value +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Value (cont) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type 42 for Acct-Input-Octets. Length 6 Value The Value field is four octets. 5.4. Acct-Output-Octets Description This attribute indicates how many octets have been sent to the port in the course of delivering this service, and can only be present in Accounting-Request records where the Acct-Status-Type is set to Stop. A summary of the Acct-Output-Octets attribute format is shown below. The fields are transmitted from left to right. Rigney expires in six months [Page 12] DRAFT RADIUS Accounting July 1995 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Value +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Value (cont) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type 43 for Acct-Output-Octets. Length 6 Value The Value field is four octets. 5.5. Acct-Session-Id Description This attribute is a unique Accounting ID to make it easy to match start and stop records in a log file. The start and stop records for a given session MUST have the same Acct-Session-Id. It is strongly recommended that the Acct-Session-Id be a printable ASCII string. For example, one implementation uses a string with an 8-digit uppercase hexadecimal number, the first two digits increment on each reboot (wrapping every 256 reboots) and the next 6 digits counting from 0 for the first person logging in after a reboot up to 2^24-1, about 16 million. Other encodings are permissible. A summary of the Acct-Session-Id attribute format is shown below. The fields are transmitted from left to right. 0 1 2 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | String ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Rigney expires in six months [Page 13] DRAFT RADIUS Accounting July 1995 Type 44 for Acct-Session-Id. Length >= 3 String The String field is a string of printable ASCII characters. 5.6. Acct-Authentic Description This attribute indicates how the user was authenticated, whether by RADIUS or by the NAS itself. Users who are delivered service without being authenticated should not generate Accounting records. A summary of the Acct-Authentic attribute format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Value +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Value (cont) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type 45 for Acct-Authentic. Length 6 Value The Value field is four octets. Rigney expires in six months [Page 14] DRAFT RADIUS Accounting July 1995 1 RADIUS 2 Local 5.7. Acct-Session-Time Description This attribute indicates how many seconds the user has received service for, and can only be present in Accounting-Request records where the Acct-Status-Type is set to Stop. A summary of the Acct-Session-Time attribute format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Value +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Value (cont) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type 46 for Acct-Session-Time. Length 6 Value The Value field is four octets. 5.8. Acct-Input-Packets Description This attribute indicates how many packets have been received from the port over the course of this service being provided to a Framed User, and can only be present in Accounting-Request records Rigney expires in six months [Page 15] DRAFT RADIUS Accounting July 1995 where the Acct-Status-Type is set to Stop. A summary of the Acct-Input-packets attribute format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Value +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Value (cont) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type 47 for Acct-Input-Packets. Length 6 Value The Value field is four octets. 5.9. Acct-Output-Packets Description This attribute indicates how many packets have been sent to the port in the course of delivering this service to a Framed User, and can only be present in Accounting-Request records where the Acct-Status-Type is set to Stop. A summary of the Acct-Output-Packets attribute format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Value +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Value (cont) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Rigney expires in six months [Page 16] DRAFT RADIUS Accounting July 1995 Type 48 for Acct-Output-Packets. Length 6 Value The Value field is four octets. 5.10. Table of Attributes The following table provides a guide to which attributes may be found in Accounting-Request packets. No attributes should be found in Accounting-Response packets (except possibly for Vendor-Specific). # Attribute 0-1 User-Name 0 User-Password 0 CHAP-Password 0-1 NAS-IP-Address [4] 0-1 NAS-Port 0-1 Service-Type 0-1 Framed-Protocol 0-1 Framed-IP-Address 0-1 Framed-IP-Netmask 0-1 Framed-Routing 0+ Filter-Id 0-1 Framed-MTU 0+ Framed-Compression 0+ Login-IP-Host 0-1 Login-Service 0-1 Login-Port 0 Reply-Message 0-1 Callback-Number 0-1 Callback-Id 0+ Framed-Route 0-1 Framed-IPX-Network 0 State 0+ Class 0+ Vendor-Specific 0-1 Session-Timeout 0-1 Idle-Timeout 0-1 Termination-Action 0-1 Called-Station-Id Rigney expires in six months [Page 17] DRAFT RADIUS Accounting July 1995 0-1 Calling-Station-Id 0-1 NAS-Identifier [4] 0+ Proxy-State 0-1 Login-LAT-Service 0-1 Login-LAT-Node 0-1 Login-LAT-Group 0-1 Framed-AppleTalk-Link 0-1 Framed-AppleTalk-Network 0-1 Framed-AppleTalk-Zone 1 Acct-Status-Type 0-1 Acct-Delay-Time 0-1 Acct-Input-Octets 0-1 Acct-Output-Octets 1 Acct-Session-Id 0-1 Acct-Authentic 0-1 Acct-Session-Time 0-1 Acct-Input-Packets 0-1 Acct-Output-Packets [4] An Accounting-Request MUST contain either a NAS-IP-Address or a NAS-Identifier, and it is permitted (but not recommended) for it to contain both. The following table defines the meaning of the above table entries. 0 This attribute MUST NOT be present 0+ Zero or more instances of this attribute MAY be present. 0-1 Zero or one instance of this attribute MAY be present. 1 Exactly one instance of this attribute MUST be present. Rigney expires in six months [Page 18] DRAFT RADIUS Accounting July 1995 Security Considerations Security issues are briefly discussed in sections concerning the authenticator included in accounting requests and responses, using a shared secret which is never sent over the network. References [1] Postel, J., "User Datagram Protocol", RFC 768, USC/Information Sciences Institute, August 1980. [2] Reynolds, J., and J. Postel, "Assigned Numbers", RFC 1700, USC/Information Sciences Institute, October 1994. [3] Rivest, R., and S. Dusse, "The MD5 Message-Digest Algorithm", MIT Laboratory for Computer Science and RSA Data Security, Inc., RFC 1321, April 1992. Acknowledgments RADIUS and RADIUS Accounting were originally developed by Livingston Enterprises for their PortMaster series of Network Access Servers. Rigney expires in six months [Page 19] DRAFT RADIUS Accounting July 1995 Chair's Address The RADIUS working group can be contacted via the current chair: Carl Rigney Livingston Enterprises 6920 Koll Center Parkway, Suite 220 Pleasanton, California 94566 Phone: +1 510 426 0770 EMail: cdr@livingston.com Author's Address Questions about this memo can also be directed to: Carl Rigney Livingston Enterprises 6920 Koll Center Parkway, Suite 220 Pleasanton, California 94566 EMail: cdr@livingston.com This document expires January 15th, 1996. Rigney expires in six months [Page 20]