9. Change Log

The following changes have been made from RFC 2138:

Strings should use UTF-8 instead of US-ASCII and should be handled as 8-bit data.

Integers and dates are now defined as 32 bit unsigned values.

Updated list of attributes that can be included in Access-Challenge to be consistent with the table of attributes.

User-Name mentions Network Access Identifiers.

User-Name may now be sent in Access-Accept for use with accounting and Rlogin.

Values added for Service-Type, Login-Service, Framed-Protocol, Framed-Compression, and NAS-Port-Type.

NAS-Port can now use all 32 bits.

Examples now include hexadecimal displays of the packets.

Source UDP port must be used in conjunction with the Request Identifier when identifying duplicates.

Multiple subattributes may be allowed in a Vendor-Specific attribute.

An Access-Request is now required to contain either a NAS-IP-Address or NAS-Identifier (or may contain both).

Added notes under "Operations" with more information on proxy, retransmissions, and keep-alives.

If multiple Attributes with the same Type are present, the order of Attributes with the same Type MUST be preserved by any proxies.

Clarified Proxy-State.

Clarified that Attributes must not depend on position within the packet, as long as Attributes of the same type are kept in order.

Added IANA Considerations section.

Updated section on "Proxy" under "Operations".

Framed-MTU can now be sent in Access-Request as a hint.

Updated Security Considerations.

Text strings identified as a subset of string, to clarify use of UTF-8.