Enterasys-networks D-Series Manuel d'utilisateur Page 182

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 540
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 181
SNMP Configuration Summary
7-2 SNMP Configuration
•SNMPnetworkmanagementapplications,suchastheEnterasysNetSightapplication,which
communicatewithagentstogetstatisticsandalertsfromthemanageddevices.
SNMPv3
SNMPv3isaninteroperablestandardsbasedprotocolthatprovidessecureaccesstodevicesby
authenticatingandencryptingframesoverthenetwork.Theadvancedsecurityfeaturesprovided
inSNMPv3areasfollows:
MessageintegrityCollectsdatasecurelywithoutbeingtamperedwithorcorrupted.
AuthenticationDeterminesthemessageisfroma
validsource.
–EncryptionScramblesthecontentsofaframetopreventitfrombeingseenbyan
unauthorizedsource.
UnlikeSNMPv1andSNMPv2c,inSNMPv3,theconceptofSNMPagentsandSNMPmanagersno
longerapply. TheseconceptshavebeencombinedintoanSNMPentity.AnSNMPentityconsists
ofanSNMPengineandSNMPapplications.AnSNMPengineconsistsofthefollowingfour
components:
•DispatcherThiscomponentsendsandreceivesmessages.
•MessageprocessingsubsystemThiscomponentacceptsoutgoingPDUsfromthe
dispatcherandpreparesthemfortransmissionbywrappingtheminamessageheaderand
returningthem
tothedispatcher.Themessageprocessingsubsystemalsoacceptsincoming
messagesfromthedispatcher,processeseachmessageheader,andreturnstheenclosedPDU
tothedispatcher.
•SecuritysubsystemThiscomponentauthenticatesandencryptsmessages.
AccesscontrolsubsystemThiscomponentdetermineswhichusersandwhichoperations
areallowedaccessto
managedobjects.
About SNMP Security Models and Levels
AnSNMPsecuritymodelisanauthenticationstrategythatissetupforauserandthegroupin
whichtheuserresides.Asecuritylevelisthepermittedlevelofsecuritywithinasecuritymodel.
ThethreelevelsofSNMPsecurityare:Noauthenticationrequired(NoAuthNoPriv);
authenticationrequired(AuthNoPriv);and
privacy(authPriv).Acombinationofasecuritymodel
andasecurityleveldetermineswhichsecuritymechanismisemployedwhenhandlinganSNMP
frame.Table 712identifiesthelevelsofSNMPsecurityava ilableonDSeriesdevicesand
authenticationrequiredwithineachmodel.
Table 7-12 SNMP Security Levels
Model Security Level Authentication Encryption How It Works
v1 NoAuthNoPriv Community string None Uses a community string match for
authentication.
v2c NoAuthNoPriv Community string None Uses a community string match for
authentication.
Vue de la page 181
1 2 ... 177 178 179 180 181 182 183 184 185 186 187 ... 539 540

Commentaires sur ces manuels

Pas de commentaire