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snmp_usm.3
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usm_snmp.c
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usm_tree.def
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Editing: snmp_usm.3
.\"- .\" Copyright (C) 2010 The FreeBSD Foundation .\" All rights reserved. .\" .\" This documentation was written by Shteryana Sotirova Shopova under .\" sponsorship from the FreeBSD Foundation. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD$ .\" .Dd September 9, 2010 .Dt SNMP_USM 3 .Os .Sh NAME .Nm snmp_usm .Nd "user-based security module for" .Xr bsnmpd 1 .Sh LIBRARY .Pq begemotSnmpdModulePath."usm" = "/usr/lib/snmp_usm.so" .Sh DESCRIPTION The .Nm snmp_usm module implements SNMPv3 User-Based Security Model MIB as defined in RFC 3414. The module is used to manage the internal list of SNMPv3 USM active users in .Nm bsnmpd . The module must be loaded for .Nm bsnmpd to receive and process SNMPv3 USM PDUs correctly. .Sh IMPLEMENTATION NOTES A short description of the objects in the MIB follows. .Bl -tag -width "XXXXXXXXX" .It Va usmStats The subtree contains statistics for the User-based Security Model PDU processing. The statistics are reset each time the module is loaded. .It Va usmUserSpinLock An advisory lock used to coordinate several Command Generator Applications when altering the SNMP USM users. .It Va usmUserTable The table contains all SNMP USM users configured in .Nm bsnmpd . The table contains the following objects .Bl -tag -width ".It Va usmUserEngineID" .It Va usmUserEngineID An SNMP engine's administratively-unique identifier. Must be set to the same Engine ID as .Nm bsnmpd so that the user will actually be allowed to communicate with the daemon. The column is used as entry key and is not accessible for GET or SET operations. .It Va usmUserName The USM user name. The second entry key, again not accessible for GET or SET operations. .It Va usmUserSecurityName The column has the exact same value as the .Va usmUserName column, however is accessible for GET operations. .It Va usmUserCloneFrom A GET on this column will return an empty OID. SET operations are currently not supported. .It Va usmUserAuthProtocol The value of this column contains the OID corresponding to the authentication protocol used by the USM user. The following protocols and their OIDs are known to .Nm module .Bl -tag -width ".It Va NoAuthProtocol" .It NoAuthProtocol 1.3.6.1.6.3.10.1.1.1 .It HMACMD5AuthProtocol 1.3.6.1.6.3.10.1.1.2 .It HMACSHAAuthProtocol 1.3.6.1.6.3.10.1.1.3 .El .It Va usmUserAuthKeyChange , Va usmUserOwnAuthKeyChange These columns may be used to change the user's authentication key. .It Va usmUserPrivProtocol The value of this column contains the OID corresponding to the privacy protocol used by the USM user. The following protocols and their OIDs are known to .Nm module .Bl -tag -width ".It Va NoPrivProtocol" .It NoPrivProtocol 1.3.6.1.6.3.10.1.2.1 .It DESPrivProtoco 1.3.6.1.6.3.10.1.2.2 .It AesCfb128Protocol 1.3.6.1.6.3.10.1.2.4 .El .It Va usmUserPrivKeyChange , Va usmUserOwnPrivKeyChange These columns may be used to change the user's privacy key. .It Va usmUserPublic An arbitrary octet string that may be modified to confirm a SET operation on any of the columns was successful. .It Va usmUserStorageType This column always has either of two values. Entries created via .Nm bsnmpd's configuration file always have this column set to readOnly (5) and it is not possible to modify those entries. Entries created by Command Generator Applications always have this column set to volatile(2) and such entries are lost when the module is restarted. A SET operation on this column is not allowed. .It Va usmUserStatus This column is used to create new USM user entries or delete existing ones from the table. .El .El .Sh FILES .Bl -tag -width "XXXXXXXXX" .It Pa /usr/share/snmp/defs/usm_tree.def The description of the MIB tree implemented by .Nm . .El .Sh SEE ALSO .Xr bsnmpd 1 , .Xr gensnmptree 1 , .Xr snmpmod 3 .Sh STANDARDS IETF RFC 3414 .Sh AUTHORS .An Shteryana Shopova Aq syrinx@FreeBSD.org
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