Integrated Security Model for SNMP (isms)
-----------------------------------------

 Charter
 Last Modified: 2007-05-08

 Current Status: Active Working Group

 Chair(s):
     Juergen Quittek  <quittek@netlab.nec.de>
     Juergen Schoenwaelder  <j.schoenwaelder@iu-bremen.de>

 Security Area Director(s):
     Tim Polk  <tim.polk@nist.gov>
     Sam Hartman  <hartmans-ietf@mit.edu>

 Security Area Advisor:
     Sam Hartman  <hartmans-ietf@mit.edu>

 Mailing Lists: 
     General Discussion:isms@ietf.org
     To Subscribe:      isms-request@ietf.org
         In Body:       in body: (un)subscribe
     Archive:           http://www.ietf.org/mail-archive/working-groups/isms/current/maillist.html

Description of Working Group:

The Simple Network Management Protocol version 3 (SNMPv3) provides
message security services through the security subsystem, for which
there is one currently defined model - the User-based Security Model
(USM). However, the USM approach has seen limited deployment so far.
One frequently reported reasons is the lack of integration of USM
key and user management into deployed authentication infrastructures.

SSH is a widely deployed access protocol for remote devices
configuration. Many devices support the integration of SSH user
authentication with AAA systems via protocols such as RADIUS.

The goal of the ISMS working group is developing a new security model
for SNMP that integrates with widely deployed user and key management
systems, as a supplement to the USM security model.

For this integration the working group will define a standard method
for mapping from AAA-provisioned authorization parameter(s) to
corresponding SNMP parameters.

In order to leverage the authentication information already accessible
at managed devices, the new security model will use the SSH protocol
for message protection, and RADIUS for AAA-provisioned user
authentication and authorization. However, the integration of a
transport mapping security model into the SNMPv3 architecture should be
defined such that it is open to support potential alternative transport
mappings to protocols such as BEEP and TLS.

The new security model must not modify any other aspects of SNMPv3
protocol as defined in STD 62 (e.g., it must not create new PDU types).

Work on new access control models or centralized administration of
View-based Access Control Model (VACM) rules and mappings is outside
the scope of the working group.

The working group will cover the following work items:

- Specify an architectural extension that describes how transport
mapping security models (TMSMs) fit into the SNMPv3 architecture.
- Specify an architectural extension that describes how to perform a
mapping from AAA-provisioned user-authentication and authorization
parameter(s)to securityName and other corresponding SNMP parameters.
- Specify a mapping from RADIUS-provisioned authentication and
authorization parameter(s) to securityName and other corresponding
SNMP parameters. This item may be a RADEXT work item last-aclled
in both groups.
- Specify a mapping from locally-provisioned authentication and
authorization parameter(s) to securityName and other corresponding
SNMP parameters.
- Define how to use SSH between the two SNMP engines
- Specify the SSH security model for SNMP.

 Goals and Milestones:

   Done         Cut-off date for internet-drafts to be submitted to the working 
                group for consideration as a proposed solution 

   Done         Decision about which architecture the WG will focus its efforts 
                on 

   Done         Initial version of a general transport mapping security models 
                (TMSMs) document that specifies how TMSMs fit into the SNMPv3 
                architecture and that defines the requirements for transport 
                mapping security models 

   Done         Initial version of a document specifying the SSH security model 
                for SNMP 

   May 2007       Initial version of a document specifying the RADIUS 
                authentication and authorization mapping model for SNMP 

   Aug 2007       Submit document on Transport Security Model for SNMP to IESG 

   Aug 2007       Submit document on Transport Subsystem for SNMP to IESG 

   Aug 2007       Submit document on Secure Shell Transport Model for SNMP to 
                IESG 

   Aug 2007       Submit RADIUS mapping model for SNMP to IESG 


 Internet-Drafts:

Posted Revised         I-D Title   <Filename>
------ ------- --------------------------------------------
Oct 2005 May 2007   <draft-ietf-isms-secshell-06.txt>
                Secure Shell Transport Model for SNMP 

Oct 2005 May 2007   <draft-ietf-isms-tmsm-08.txt>
                Transport Subsystem for the Simple Network Management Protocol 
                (SNMP) 

Oct 2006 May 2007   <draft-ietf-isms-transport-security-model-04.txt>
                Transport Security Model for SNMP 

 Request For Comments:

  None to date.