| Network Working Group | A. Bierman |
| Internet-Draft | YumaWorks |
| Intended status: Standards Track | M. Bjorklund |
| Expires: October 17, 2014 | Tail-f Systems |
| April 15, 2014 |
A YANG Data Model for System Management
draft-ietf-netmod-system-mgmt-14
This document defines a YANG data model for the configuration and identification of some common system properties within a device containing a NETCONF server. This includes data node definitions for system identification, time-of-day management, user management, DNS resolver configuration, and some protocol operations for system management.
This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at http://datatracker.ietf.org/drafts/current/.
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."
This Internet-Draft will expire on October 17, 2014.
Copyright (c) 2014 IETF Trust and the persons identified as the document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.
This document defines a YANG [RFC6020] data model for the configuration and identification of some common properties within a device containing a NETCONF server.
Devices that are managed by NETCONF and perhaps other mechanisms have common properties that need to be configured and monitored in a standard way.
The "ietf‑system" YANG module defined in this document provides the following features:
The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14, [RFC2119].
The following terms are defined in [RFC6241] and are not redefined here:
A simplified graphical representation of the data model is used in this document. The meaning of the symbols in these diagrams is as follows:
There are many common properties used to identify devices, operating systems, software versions, etc. that need to be supported in the system data module. These objects are defined as operational state data and the information returned by the server is intended to be specific to the device vendor.
Some user-configurable administrative strings are also provided, such as the system location and description.
The management of the date and time used by the system need to be supported. Use of one or more NTP servers to automatically set the system date and time need to be possible. Utilization of the Timezone database [RFC6557] also need to be supported. It should be possible to configure the system to use NTP.
The authentication mechanism needs to support password authentication over RADIUS, to support deployment scenarios with centralized authentication servers. Additionally, local users need to be supported, for scenarios when no centralized authentication server exists, or for situations where the centralized authentication server cannot be reached from the device.
Since the mandatory transport protocol for NETCONF is SSH [RFC6242] the authentication model needs to support SSH's "publickey" and "password" authentication methods [RFC4252].
The model for authentication configuration should be flexible enough to support authentication methods defined by other standard documents or by vendors. It should be possible to configure the system authentication properties.
The configuration of the DNS resolver within the system containing the NETCONF server is required in order to control how domain names are resolved.
A few operations are needed to support common tasks such as restarting the device or setting the system date and time.
The data model for system identification has the following structure:
+--rw system
| +--rw contact? string
| +--rw hostname? inet:domain-name
| +--rw location? string
+--ro system-state
+--ro platform
+--ro os-name? string
+--ro os-release? string
+--ro os-version? string
+--ro machine? string
The data model for system time management has the following structure:
+--rw system
| +--rw clock
| | +--rw (timezone)?
| | +--:(timezone-name)
| | | +--rw timezone-name? timezone-name
| | +--:(timezone-utc-offset)
| | +--rw timezone-utc-offset? int16
| +--rw ntp!
| +--rw enabled? boolean
| +--rw server* [name]
| +--rw name string
| +--rw (transport)
| | +--:(udp)
| | +--rw udp
| | +--rw address inet:host
| | +--rw port? inet:port-number
| +--rw association-type? enumeration
| +--rw iburst? boolean
| +--rw prefer? boolean
+--ro system-state
+--ro clock
+--ro current-datetime? yang:date-and-time
+--ro boot-datetime? yang:date-and-time
New "case" statements can be added over time or augmented to the "transport" choice to support other transport protocols.
The data model for configuration of the DNS resolver has the following structure:
+--rw system
+--rw dns-resolver
+--rw search* inet:domain-name
+--rw server* [name]
| +--rw name string
| +--rw (transport)
| +--:(udp-and-tcp)
| +--udp-and-tcp
| +--rw address inet:ip-address
| +--rw port? inet:port-number
+--rw options
+--rw timeout? uint8
+--rw attempts? uint8
New "case" statements can be added over time or augmented to the "transport" choice to support other transport protocols.
The data model for configuration of the RADIUS client has the following structure:
+--rw system
+--rw radius
+--rw server* [name]
| +--rw name string
| +--rw (transport)
| | +--:(udp)
| | +--rw udp
| | +--rw address inet:host
| | +--rw authentication-port? inet:port-number
| | +--rw shared-secret string
| +--rw authentication-type? identityref
+--rw options
+--rw timeout? uint8
+--rw attempts? uint8
New "case" statements can be added over time or augmented to the "transport" choice to support other transport protocols.
This document defines three authentication methods for use with NETCONF:
Additional methods can be defined by other standard documents or by vendors.
This document defines two optional YANG features, "local‑users" and "radius‑authentication", which the server advertises to indicate support for configuring local users on the device, and support for using RADIUS for authentication, respectively.
The authentication parameters defined in this document are primarily used to configure authentication of NETCONF users, but MAY also be used by other interfaces, e.g., a Command Line Interface or a Web-based User Interface.
The data model for user authentication has the following structure:
+--rw system
+--rw authentication
+--rw user-authentication-order* identityref
+--rw user* [name]
+--rw name string
+--rw password? ianach:crypt-hash
+--rw ssh-key* [name]
+--rw name string
+--rw algorithm string
+--rw key-data binary
If the NETCONF server advertises the "local‑users" feature, configuration of local users and their SSH public keys is supported in the /system/authentication/user list.
Public key authentication is requested by the SSH client. If the "local‑users" feature is supported, then when a NETCONF client starts an SSH session towards the server using the "publickey" authentication "method name" [RFC4252], the SSH server looks up the user name given in the SSH authentication request in the /system/authentication/user list, and verifies the key as described in [RFC4253].
If the NETCONF server advertises the "local‑users" feature, configuration of local users and their passwords is supported in the /system/authentication/user list.
For NETCONF transport protocols that support password authentication, the leaf-list "user‑authentication‑order" is used to control if local user password authentication should be used.
In SSH, password authentication is requested by the client. Other NETCONF transport protocols MAY also support password authentication.
When local user password authentication is requested, the NETCONF transport looks up the user name provided by the client in the /system/authentication/user list, and verifies the password.
If the NETCONF server advertises the "radius‑authentication" feature, the device supports user authentication using RADIUS.
For NETCONF transport protocols that support password authentication, the leaf-list "user‑authentication‑order" is used to control if RADIUS password authentication should be used.
In SSH, password authentication is requested by the client. Other NETCONF transport protocols MAY also support password authentication.
The following operations are defined:
set-current-datetime system-restart system-shutdown
Two protocol operations are included to restart or shutdown the system. The 'system‑restart' operation can be used to restart the entire system (not just the NETCONF server). The 'system‑shutdown' operation can be used to power off the entire system.
If a device implements the SNMPv2-MIB [RFC3418], there are two objects that MAY be mapped by the implementation. See the YANG module definition in Section 6 for details. The following table lists the YANG data nodes with corresponding objects in the SNMPv2-MIB.
| YANG data node | SNMPv2-MIB object |
|---|---|
| contact | sysContact |
| location | sysLocation |
This YANG module references [RFC1321], [IEEE-1003.1-2008], and [FIPS.180-3.2008].
<CODE BEGINS> file "iana-crypt-hash@2014-04-04.yang"
module iana-crypt-hash {
namespace "urn:ietf:params:xml:ns:yang:iana-crypt-hash";
prefix ianach;
organization "IANA";
contact
" Internet Assigned Numbers Authority
Postal: ICANN
4676 Admiralty Way, Suite 330
Marina del Rey, CA 90292
Tel: +1 310 823 9358
E-Mail: iana&iana.org";
description
"This YANG module defines a typedef for storing passwords
using a hash function, and features to indicate which hash
functions are supported by an implementation.
The latest revision of this YANG module can be obtained from
the IANA web site.
Requests for new values should be made to IANA via
email (iana&iana.org).
Copyright (c) 2014 IETF Trust and the persons identified as
authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(http://trustee.ietf.org/license-info).
The initial version of this YANG module is part of RFC XXXX;
see the RFC itself for full legal notices.";
// RFC Ed.: replace XXXX with actual RFC number and remove this
// note.
// RFC Ed.: update the date below with the date of RFC publication
// and remove this note.
revision 2014-04-04 {
description
"Initial revision.";
reference
"RFC XXXX: A YANG Data Model for System Management";
}
typedef crypt-hash {
type string {
pattern
'$0$.*'
+ '|$1$[a-zA-Z0-9./]{1,8}$[a-zA-Z0-9./]{22}'
+ '|$5$(rounds=\d+$)?[a-zA-Z0-9./]{1,16}$[a-zA-Z0-9./]{43}'
+ '|$6$(rounds=\d+$)?[a-zA-Z0-9./]{1,16}$[a-zA-Z0-9./]{86}';
}
description
"The crypt-hash type is used to store passwords using
a hash function. The algorithms for applying the hash
function and encoding the result are implemented in
various UNIX systems as the function crypt(3).
A value of this type matches one of the forms:
$0$<clear text password>
$<id>$<salt>$<password hash>
$<id>$<parameter>$<salt>$<password hash>
The '$0$' prefix signals that the value is clear text. When
such a value is received by the server, a hash value is
calculated, and the string '$<id>$<salt>$' or
$<id>$<parameter>$<salt>$ is prepended to the result. This
value is stored in the configuration data store.
If a value starting with '$<id>$', where <id> is not '0', is
received, the server knows that the value already represents a
hashed value, and stores it as is in the data store.
When a server needs to verify a password given by a user, it
finds the stored password hash string for that user, extracts
the salt, and calculates the hash with the salt and given
password as input. If the calculated hash value is the same
as the stored value, the password given by the client is
accepted.
This type defines the following hash functions:
id | hash function | feature
---+---------------+-------------------
1 | MD5 | crypt-hash-md5
5 | SHA-256 | crypt-hash-sha-256
6 | SHA-512 | crypt-hash-sha-512
The server indicates support for the different hash functions
by advertising the corresponding feature.";
reference
"IEEE Std 1003.1-2008 - crypt() function
RFC 1321: The MD5 Message-Digest Algorithm
FIPS.180-3.2008: Secure Hash Standard";
}
feature crypt-hash-md5 {
description
"Indicates that the device supports the MD5
hash function in 'crypt-hash' values";
reference "RFC 1321: The MD5 Message-Digest Algorithm";
}
feature crypt-hash-sha-256 {
description
"Indicates that the device supports the SHA-256
hash function in 'crypt-hash' values";
reference "FIPS.180-3.2008: Secure Hash Standard";
}
feature crypt-hash-sha-512 {
description
"Indicates that the device supports the SHA-512
hash function in 'crypt-hash' values";
reference "FIPS.180-3.2008: Secure Hash Standard";
}
}
<CODE ENDS>
This YANG module imports YANG extensions from [RFC6536], and imports YANG types from [RFC6991]. It also references [RFC1035], [RFC2865], [RFC3418], [RFC5607], [RFC5966], [RFC6557].
RFC Ed.: update the date below with the date of RFC publication and remove this note.
<CODE BEGINS> file "ietf-system@2014-04-04.yang"
module ietf-system {
namespace "urn:ietf:params:xml:ns:yang:ietf-system";
prefix "sys";
import ietf-yang-types {
prefix yang;
}
import ietf-inet-types {
prefix inet;
}
import ietf-netconf-acm {
prefix nacm;
}
import iana-crypt-hash {
prefix ianach;
}
organization
"IETF NETMOD (NETCONF Data Modeling Language) Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/netmod/>
WG List: <mailto:netmod@ietf.org>
WG Chair: Thomas Nadeau
<mailto:tnadeau@lucidvision.com>
WG Chair: Juergen Schoenwaelder
<mailto:j.schoenwaelder@jacobs-university.de>
Editor: Andy Bierman
<mailto:andy@yumaworks.com>
Editor: Martin Bjorklund
<mailto:mbj@tail-f.com>";
description
"This module contains a collection of YANG definitions for the
configuration and identification of some common system
properties within a device containing a NETCONF server. This
includes data node definitions for system identification,
time-of-day management, user management, DNS resolver
configuration, and some protocol operations for system
management.
Copyright (c) 2014 IETF Trust and the persons identified as
authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(http://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
// RFC Ed.: replace XXXX with actual RFC number and remove this
// note.
// RFC Ed.: remove this note
// Note: extracted from draft-ietf-netmod-system-mgmt-07.txt
// RFC Ed.: update the date below with the date of RFC publication
// and remove this note.
revision "2014-04-04" {
description
"Initial revision.";
reference
"RFC XXXX: A YANG Data Model for System Management";
}
/*
* Typedefs
*/
typedef timezone-name {
type string;
description
"A timezone name as used by the Time Zone Database, sometimes
referred to as the 'Olson Database'.
The exact set of valid values is an implementation-specific
matter. Client discovery of the exact set of time zone names
for a particular server is out of scope.";
reference
"RFC 6557: Procedures for Maintaining the Time Zone Database";
}
/*
* Features
*/
feature radius {
description
"Indicates that the device can be configured as a RADIUS
client.";
reference
"RFC 2865: Remote Authentication Dial In User Service "
+ "(RADIUS)";
}
feature authentication {
description
"Indicates that the device supports configuration
for user authentication.";
}
feature local-users {
if-feature authentication;
description
"Indicates that the device supports configuration of
local user authentication.";
}
feature radius-authentication {
if-feature radius;
if-feature authentication;
description
"Indicates that the device supports configuration of user
authentication over RADIUS.";
reference
"RFC 2865: Remote Authentication Dial In User Service (RADIUS)
RFC 5607: Remote Authentication Dial-In User Service (RADIUS)
Authorization for Network Access Server (NAS)
Management";
}
feature ntp {
description
"Indicates that the device can be configured
to use one or more NTP servers to set the
system date and time.";
}
feature ntp-udp-port {
if-feature ntp;
description
"Indicates that the device supports the configuration of
the UDP port for NTP servers.
This is a 'feature' since many implementations do not support
any other port than the default port.";
}
feature timezone-name {
description
"Indicates that the local timezone on the device
can be configured to use the TZ database
to set the timezone and manage daylight savings time.";
reference
"RFC 6557: Procedures for Maintaining the Time Zone Database";
}
feature dns-udp-tcp-port {
description
"Indicates that the device supports the configuration of
the UDP and TCP port for DNS servers.
This is a 'feature' since many implementations do not support
any other port than the default port.";
}
/*
* Identities
*/
identity authentication-method {
description
"Base identity for user authentication methods.";
}
identity radius {
base authentication-method;
description
"Indicates user authentication using RADIUS.";
reference
"RFC 2865: Remote Authentication Dial In User Service (RADIUS)
RFC 5607: Remote Authentication Dial-In User Service (RADIUS)
Authorization for Network Access Server (NAS)
Management";
}
identity local-users {
base authentication-method;
description
"Indicates password-based authentication of locally
configured users.";
}
identity radius-authentication-type {
description
"Base identity for RADIUS authentication types.";
}
identity radius-pap {
base radius-authentication-type;
description
"The device requests PAP authentication from the RADIUS
server.";
reference
"RFC 2865: Remote Authentication Dial In User Service";
}
identity radius-chap {
base radius-authentication-type;
description
"The device requests CHAP authentication from the RADIUS
server.";
reference
"RFC 2865: Remote Authentication Dial In User Service";
}
/*
* Configuration data nodes
*/
container system {
description
"System group configuration.";
leaf contact {
type string;
description
"The administrator contact information for the system.
A server implementation MAY map this leaf to the sysContact
MIB object. Such an implementation needs to use some
mechanism to handle the differences in size and characters
allowed between this leaf and sysContact. The definition of
such a mechanism is outside the scope of this document.";
reference
"RFC 3418: Management Information Base (MIB) for the
Simple Network Management Protocol (SNMP)
SNMPv2-MIB.sysContact";
}
leaf hostname {
type inet:domain-name;
description
"The name of the host. This name can be a single domain
label, or the fully qualified domain name of the host.";
}
leaf location {
type string;
description
"The system location.
A server implementation MAY map this leaf to the sysLocation
MIB object. Such an implementation needs to use some
mechanism to handle the differences in size and characters
allowed between this leaf and sysLocation. The definition
of such a mechanism is outside the scope of this document.";
reference
"RFC 3418: Management Information Base (MIB) for the
Simple Network Management Protocol (SNMP)
SNMPv2-MIB.sysLocation";
}
container clock {
description
"Configuration of the system date and time properties.";
choice timezone {
description
"The system timezone information.";
case timezone-name {
if-feature timezone-name;
leaf timezone-name {
type timezone-name;
description
"The TZ database name to use for the system, such
as 'Europe/Stockholm'.";
}
}
case timezone-utc-offset {
leaf timezone-utc-offset {
type int16 {
range "-1500 .. 1500";
}
units "minutes";
description
"The number of minutes to add to UTC time to
identify the timezone for this system. For example,
'UTC - 8:00 hours' would be represented as '-480'.
Note that automatic daylight savings time adjustment
is not provided, if this object is used.";
}
}
}
}
container ntp {
if-feature ntp;
presence
"Enables the NTP client unless the 'enabled' leaf
(which defaults to 'true') is set to 'false'";
description
"Configuration of the NTP client.";
leaf enabled {
type boolean;
default true;
description
"Indicates that the system should attempt
to synchronize the system clock with an
NTP server from the 'ntp/server' list.";
}
list server {
key name;
description
"List of NTP servers to use for
system clock synchronization. If '/system/ntp/enabled'
is 'true', then the system will attempt to
contact and utilize the specified NTP servers.";
leaf name {
type string;
description
"An arbitrary name for the NTP server.";
}
choice transport {
mandatory true;
description
"The transport protocol specific parameters for this
server.";
case udp {
container udp {
description
"Contains UDP specific configuration parameters
for NTP.";
leaf address {
type inet:host;
mandatory true;
description
"The address of the NTP server.";
}
leaf port {
if-feature ntp-udp-port;
type inet:port-number;
default 123;
description
"The port number of the NTP server.";
}
}
}
}
leaf association-type {
type enumeration {
enum server {
description
"Use client association mode. This device
will not provide synchronization to the
configured NTP server.";
}
enum peer {
description
"Use symmetric active association mode.
This device may provide synchronization
to the configured NTP server.";
}
enum pool {
description
"Use client association mode with one or
more of the NTP servers found by DNS
resolution of the domain name given by
the 'address' leaf. This device will not
provide synchronization to the servers.";
}
}
default server;
description
"The desired association type for this NTP server.";
}
leaf iburst {
type boolean;
default false;
description
"Indicates whether this server should enable burst
synchronization or not.";
}
leaf prefer {
type boolean;
default false;
description
"Indicates whether this server should be preferred
or not.";
}
}
}
container dns-resolver {
description
"Configuration of the DNS resolver.";
leaf-list search {
type inet:domain-name;
ordered-by user;
description
"An ordered list of domains to search when resolving
a host name.";
}
list server {
key name;
ordered-by user;
description
"List of the DNS servers that the resolver should query.
When the resolver is invoked by a calling application, it
sends the query to the first name server in this list. If
no response has been received within 'timeout' seconds,
the resolver continues with the next server in the list.
If no response is received from any server, the resolver
continues with the first server again. When the resolver
has traversed the list 'attempts' times without receiving
any response, it gives up and returns an error to the
calling application.
Implementations MAY limit the number of entries in this
list.";
leaf name {
type string;
description
"An arbitrary name for the DNS server.";
}
choice transport {
mandatory true;
description
"The transport protocol specific parameters for this
server.";
case udp-and-tcp {
container udp-and-tcp {
description
"Contains UDP and TCP specific configuration
parameters for DNS.";
reference
"RFC 1035: Domain Implementation and Specification
RFC 5966: DNS over TCP";
leaf address {
type inet:ip-address;
mandatory true;
description
"The address of the DNS server.";
}
leaf port {
if-feature dns-udp-tcp-port;
type inet:port-number;
default 53;
description
"The UDP and TCP port number of the DNS server.";
}
}
}
}
}
container options {
description
"Resolver options. The set of available options has been
limited to those that are generally available across
different resolver implementations, and generally
useful.";
leaf timeout {
type uint8 {
range "1..max";
}
units "seconds";
default "5";
description
"The amount of time the resolver will wait for a
response from each remote name server before
retrying the query via a different name server.";
}
leaf attempts {
type uint8 {
range "1..max";
}
default "2";
description
"The number of times the resolver will send a query to
all its name servers before giving up and returning an
error to the calling application.";
}
}
}
container radius {
if-feature radius;
description
"Configuration of the RADIUS client.";
list server {
key name;
ordered-by user;
description
"List of RADIUS servers used by the device.
When the RADIUS client is invoked by a calling
application, it sends the query to the first server in
this list. If no response has been received within
'timeout' seconds, the client continues with the next
server in the list. If no response is received from any
server, the client continues with the first server again.
When the client has traversed the list 'attempts' times
without receiving any response, it gives up and returns an
error to the calling application.";
leaf name {
type string;
description
"An arbitrary name for the RADIUS server.";
}
choice transport {
mandatory true;
description
"The transport protocol specific parameters for this
server.";
case udp {
container udp {
description
"Contains UDP specific configuration parameters
for RADIUS.";
leaf address {
type inet:host;
mandatory true;
description
"The address of the RADIUS server.";
}
leaf authentication-port {
type inet:port-number;
default "1812";
description
"The port number of the RADIUS server.";
}
leaf shared-secret {
type string;
mandatory true;
nacm:default-deny-all;
description
"The shared secret which is known to both the
RADIUS client and server.";
reference
"RFC 2865: Remote Authentication Dial In User
Service";
}
}
}
}
leaf authentication-type {
type identityref {
base radius-authentication-type;
}
default radius-pap;
description
"The authentication type requested from the RADIUS
server.";
}
}
container options {
description
"RADIUS client options.";
leaf timeout {
type uint8 {
range "1..max";
}
units "seconds";
default "5";
description
"The number of seconds the device will wait for a
response from each RADIUS server before trying with a
different server.";
}
leaf attempts {
type uint8 {
range "1..max";
}
default "2";
description
"The number of times the device will send a query to
all its RADIUS servers before giving up.";
}
}
}
container authentication {
nacm:default-deny-write;
if-feature authentication;
description
"The authentication configuration subtree.";
leaf-list user-authentication-order {
type identityref {
base authentication-method;
}
must '(. != "sys:radius" or ../../radius/server)' {
error-message
"When 'radius' is used, a RADIUS server"
+ " must be configured.";
description
"When 'radius' is used as an authentication method,
a RADIUS server must be configured.";
}
ordered-by user;
description
"When the device authenticates a user with a password,
it tries the authentication methods in this leaf-list in
order. If authentication with one method fails, the next
method is used. If no method succeeds, the user is
denied access.
An empty user-authentication-order leaf-list still allows
authentication of users using mechanisms that do not
involve a password.
If the 'radius-authentication' feature is advertised by
the NETCONF server, the 'radius' identity can be added to
this list.
If the 'local-users' feature is advertised by the
NETCONF server, the 'local-users' identity can be
added to this list.";
}
list user {
if-feature local-users;
key name;
description
"The list of local users configured on this device.";
leaf name {
type string;
description
"The user name string identifying this entry.";
}
leaf password {
type ianach:crypt-hash;
description
"The password for this entry.";
}
list ssh-key {
key name;
description
"A list of public SSH keys for this user.";
reference
"RFC 4253: The Secure Shell (SSH) Transport Layer
Protocol";
leaf name {
type string;
description
"An arbitrary name for the ssh key.";
}
leaf algorithm {
type string;
mandatory true;
description
"The public key algorithm name for this ssh key.
Valid values are the values in the IANA Secure Shell
(SSH) Protocol Parameters registry, Public Key
Algorithm Names";
reference
"IANA Secure Shell (SSH) Protocol Parameters registry,
Public Key Algorithm Names";
}
leaf key-data {
type binary;
mandatory true;
description
"The binary key data for this ssh key.";
}
}
}
}
}
/*
* Operational state data nodes
*/
container system-state {
config false;
description
"System group operational state.";
container platform {
description
"Contains vendor-specific information for
identifying the system platform and operating system.";
reference
"IEEE Std 1003.1-2008 - sys/utsname.h";
leaf os-name {
type string;
description
"The name of the operating system in use,
for example 'Linux'";
reference
"IEEE Std 1003.1-2008 - utsname.sysname";
}
leaf os-release {
type string;
description
"The current release level of the operating
system in use. This string MAY indicate
the OS source code revision.";
reference
"IEEE Std 1003.1-2008 - utsname.release";
}
leaf os-version {
type string;
description
"The current version level of the operating
system in use. This string MAY indicate
the specific OS build date and target variant
information.";
reference
"IEEE Std 1003.1-2008 - utsname.version";
}
leaf machine {
type string;
description
"A vendor-specific identifier string representing
the hardware in use.";
reference
"IEEE Std 1003.1-2008 - utsname.machine";
}
}
container clock {
description
"Monitoring of the system
date and time properties.";
leaf current-datetime {
type yang:date-and-time;
description
"The current system date and time.";
}
leaf boot-datetime {
type yang:date-and-time;
description
"The system date and time when the system last restarted.";
}
}
}
rpc set-current-datetime {
nacm:default-deny-all;
description
"Set the /system-state/clock/current-datetime leaf
to the specified value.
If the system is using NTP (i.e., /system/ntp/enabled
is set to 'true'), then this operation will
fail with error-tag 'operation-failed',
and error-app-tag value of 'ntp-active'";
input {
leaf current-datetime {
type yang:date-and-time;
mandatory true;
description
"The current system date and time.";
}
}
}
rpc system-restart {
nacm:default-deny-all;
description
"Request that the entire system be restarted immediately.
A server SHOULD send an rpc reply to the client before
restarting the system.";
}
rpc system-shutdown {
nacm:default-deny-all;
description
"Request that the entire system be shut down immediately.
A server SHOULD send an rpc reply to the client before
shutting down the system.";
}
}
<CODE ENDS>
This document defines first version of the IANA-maintained "iana‑crypt‑hash" YANG module, which will allow for new hash algorithms to be added to the type "crypt‑hash". An Expert Review, as defined by [RFC5226], is REQUIRED, for each modification.
This document registers two URIs in the IETF XML registry [RFC3688]. Following the format in RFC 3688, the following registrations are requested to be made.
URI: urn:ietf:params:xml:ns:yang:iana-crypt-hash
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-system
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
This document registers two YANG modules in the YANG Module Names registry [RFC6020].
name: iana-crypt-hash namespace: urn:ietf:params:xml:ns:yang:iana-crypt-hash prefix: ianach reference: RFC XXXX name: ietf-system namespace: urn:ietf:params:xml:ns:yang:ietf-system prefix: sys reference: RFC XXXX
The YANG modules defined in this memo are designed to be accessed via the NETCONF protocol [RFC6241]. The lowest NETCONF layer is the secure transport layer and the mandatory-to-implement secure transport is SSH [RFC6242]. Authorization for access to specific portions of conceptual data and operations within this module is provided by the NETCONF access control model (NACM) [RFC6536].
There are a number of data nodes defined in the "ietf‑system" YANG module which are writable/creatable/deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations to these data nodes can have a negative effect on network operations. It is thus important to control write access (e.g., via edit-config) to these data nodes. These are the subtrees and data nodes and their sensitivity/vulnerability:
Some of the readable data nodes in the "ietf‑system" YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control read access (e.g., via get, get-config, or notification) to these data nodes. These are the subtrees and data nodes and their sensitivity/vulnerability:
Some of the remote procedure call (RPC) operations in the "ietf‑system" YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control access to these operations. These are the operations and their sensitivity/vulnerability:
Since this document describes the use of RADIUS for purposes of authentication, it is vulnerable to all of the threats that are present in other RADIUS applications. For a discussion of such threats, see [RFC2865] and [RFC3162].
The "iana‑crypt‑hash" YANG module defines a type "crypt‑hash" that can be used to store MD5 hashes. [RFC6151] discusses security considerations for MD5. The usage of MD5 is NOT RECOMMENDED.
-- RFC Ed.: remove this section before publication.
| [RFC3688] | Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, January 2004. |
| [RFC6557] | Lear, E. and P. Eggert, "Procedures for Maintaining the Time Zone Database", BCP 175, RFC 6557, February 2012. |