- RADIUS Attributes Overview and RADIUS IETF Attributes
- RADIUS Vendor-Proprietary Attributes
- RADIUS Vendor-Specific Attributes and RADIUS Disconnect-Cause Attribute Values
- Connect-Info RADIUS Attribute 77
- Encrypted Vendor-Specific Attributes
- RADIUS Attribute 5 NAS-Port Format Specified on a Per-Server Group Level
- RADIUS Attribute 8 Framed-IP-Address in Access Requests
- RADIUS Attribute 82 Tunnel Assignment ID
- RADIUS Attribute 104
- RADIUS Tunnel Attribute Extensions
- V.92 Reporting Using RADIUS Attribute v.92-info
- RADIUS Attribute 66 Tunnel-Client-Endpoint Enhancements
- RADIUS Attribute Screening
- RADIUS NAS-IP-Address Attribute Configurability
- AAA Per VC QoS Policy Support
Contents
- Encrypted Vendor-Specific Attributes
- Finding Feature Information
- Prerequisites for Encrypted Vendor-Specific Attributes
- Information About Encrypted Vendor-Specific Attributes
- Tagged String VSA
- Encrypted String VSA
- Tagged and Encrypted String VSA
- How to Verify Encrypted Vendor-Specific Attributes
- Configuration Examples for Encrypted Vendor-Specific Attributes
- NAS Configuration Example
- RADIUS User Profile with a Tagged and Encrypted VSA Example
- Additional References
- Feature Information for Encrypted Vendor-Specific Attributes
Encrypted Vendor-Specific Attributes
The Encrypted Vendor-Specific Attributes feature provides users with a way to centrally manage filters at a RADIUS server and supports the following types of string vendor-specific attributes (VSAs):
Tagged String VSA (similar to Cisco VSA type 1 (Cisco:AVPair (1)) except that this new VSA is tagged)
Encrypted String VSA (similar to Cisco VSA type 1 except that this new VSA is encrypted)
Tagged and Encrypted String VSA (similar to Cisco VSA type 1 except that this new VSA is tagged and encrypted)
Cisco:AVPairs specify additional authentication and authorization information in the form an Attribute-Value Pair (AVPair) string. When Internet Engineering Task Force (IETF) RADIUS attribute 26 (Vendor-Specific) is transmitted with a vendor-Id number of “9” and a vendor-type value of “1” (which means that it is a Cisco AVPair), the RADIUS user profile format for a Cisco AVPair looks as follows: Cisco:AVPair = “protocol:attribute=value”.
- Finding Feature Information
- Prerequisites for Encrypted Vendor-Specific Attributes
- Information About Encrypted Vendor-Specific Attributes
- How to Verify Encrypted Vendor-Specific Attributes
- Configuration Examples for Encrypted Vendor-Specific Attributes
- Additional References
- Feature Information for Encrypted Vendor-Specific Attributes
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Prerequisites for Encrypted Vendor-Specific Attributes
Before the RADIUS server can accept tagged and encrypted VSAs, you must configure your server for AAA authentication and authorization and to accept PPP calls. See the Prerequisites for Encrypted Vendor-Specific Attributes for documents that explain how to perform these tasks.
Information About Encrypted Vendor-Specific Attributes
Tagged String VSA
The figure below displays the packet format for the Tagged String VSA:
To retrieve the correct value, the Tag field must be parsed correctly. The value for this field can range only from 0x01 through 0x1F. If the value is not within the specified range, the RADIUS server ignores the value and considers the Tag field to be a part of the Attribute String field.
Encrypted String VSA
The figure below displays the packet format for the Encrypted String VSA:
The Salt field ensures the uniqueness of the encryption key that is used to encrypt each instance of the VSA. The first and most significant bit of the Salt field must be set to 1.
 Note | Vendor-type (36) indicates that the attribute is an encrypted string VSA. |
Tagged and Encrypted String VSA
The figure below displays the packet formats for each of the newly supported VSAs:
This VSA is similar to encrypted string VSAs except this VSA has an additional Tag field. If the Tag field is not within the valid range (0x01 through 0x1F), it is considered to be part of the Salt field.
How to Verify Encrypted Vendor-Specific Attributes
The Encrypted Vendor-Specific Attributes feature requires no configuration. To verify that RADIUS-tagged and encrypted VSAs are being sent from the RADIUS server, use the following command in privileged EXEC mode:
|
Command |
Purpose |
|---|---|
Router# debug radius
|
Displays information associated with RADIUS. The output of this command shows whether tagged and encrypted VSAs are being sent from the RADIUS server. |
Configuration Examples for Encrypted Vendor-Specific Attributes
NAS Configuration Example
The following example shows how to configure a network access server (NAS) with a basic configuration using tagged and encrypted VSAs. (This example assumes that the configuration required to make PPP calls is already enabled.)
aaa new-model aaa authentication ppp default group radius aaa authorization network default group radius ! radius-server host 10.2.2.2 auth-port 1645 acct-port 1646 radius-server key cisco
RADIUS User Profile with a Tagged and Encrypted VSA Example
The following is an example of user profile on a RADIUS server that supports tagged and encrypted string VSAs:
mascot Password = "password1"
Service-Type = NAS-Prompt,
Framed-Protocol = PPP,
Cisco:Cisco-Enc = "ip:route=10.0.0.0 255.0.0.0"
Cisco.attr Cisco-Enc 36 tag-encstr(*,*)
Additional References
Related Documents
|
Related Topic |
Document Title |
|---|---|
|
Cisco IOS commands |
Cisco IOS Master Commands List, All Releases |
|
RADIUS Attributes |
Cisco IOS XE Security Configuration Guide: Securing User Services , Release 2 |
|
Media-Independent PPP and Multilink PPP |
Configuring Media-Independent PPP and Multilink PPP feature module. |
|
Authentication |
Configuring Authentication feature module. |
|
Authorization |
Configuring Authorization feature module. |
Standards
|
Standard |
Title |
|---|---|
|
None. |
-- |
MIBs
|
MIB |
MIBs Link |
|---|---|
|
None. |
To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL: |
RFCs
|
RFC |
Title |
|---|---|
|
RFC 2865 |
Remote Authentication Dial In User Service (RADIUS) |
|
RFC 2868 |
RADIUS Attributes for Tunnel Protocol Support |
Technical Assistance
|
Description |
Link |
|---|---|
|
The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. |
Feature Information for Encrypted Vendor-Specific Attributes
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
|
Feature Name |
Releases |
Feature Information |
|---|---|---|
|
Encrypted Vendor-Specific Attributes |
12.2(8)T 12.2(28)SB 12.2(33)SRC |
The Encrypted Vendor-Specific Attributes feature provides users with a way to centrally manage filters at a RADIUS server and supports the Tagged String, Encrypted String, and Tagged and Encrypted String vendor-specific attributes (VSAs). This feature was introduced in Cisco IOS Release 12.2(8)T. This feature was integrated into Cisco IOS Release 12.2(28)SB. This feature was integrated into Cisco IOS Release 12.2(33)SRC. |