1""" 2Multiple SNMP communities 3+++++++++++++++++++++++++ 4 5Respond to SNMP GET/SET/GETNEXT queries with the following options: 6 7* SNMPv1 8* with SNMP community "public" (read access) or "private" (write access) 9* allow access to SNMPv2-MIB objects (1.3.6.1.2.1) 10* over IPv4/UDP, listening at 127.0.0.1:161 11 12Allow read/write access to all objects in the same MIB subtree. 13 14The following Net-SNMP's commands will GET/SET a value at this Agent: 15 16| $ snmpget -v1 -c public 127.0.0.1 SNMPv2-MIB::sysLocation.0 17| $ snmpset -v1 -c private 127.0.0.1 SNMPv2-MIB::sysLocation.0 s "far away" 18 19"""# 20from pysnmp.entity import engine, config 21from pysnmp.entity.rfc3413 import cmdrsp, context 22from pysnmp.carrier.asyncore.dgram import udp 23 24# Create SNMP engine with autogenernated engineID and pre-bound 25# to socket transport dispatcher 26snmpEngine = engine.SnmpEngine() 27 28# Transport setup 29 30# UDP over IPv4 31config.addTransport( 32 snmpEngine, 33 udp.domainName, 34 udp.UdpTransport().openServerMode(('127.0.0.1', 161)) 35) 36 37# SNMPv1 setup 38 39# SecurityName <-> CommunityName mapping. 40# Here we configure two distinct CommunityName's to control read and write 41# operations. 42config.addV1System(snmpEngine, 'my-read-area', 'public') 43config.addV1System(snmpEngine, 'my-write-area', 'private') 44 45# Allow full MIB access for this user / securityModels at VACM 46config.addVacmUser(snmpEngine, 1, 'my-read-area', 'noAuthNoPriv', (1, 3, 6, 1, 2, 1)) 47config.addVacmUser(snmpEngine, 1, 'my-write-area', 'noAuthNoPriv', (1, 3, 6, 1, 2, 1), (1, 3, 6, 1, 2, 1)) 48 49# Get default SNMP context this SNMP engine serves 50snmpContext = context.SnmpContext(snmpEngine) 51 52# Register SNMP Applications at the SNMP engine for particular SNMP context 53cmdrsp.GetCommandResponder(snmpEngine, snmpContext) 54cmdrsp.SetCommandResponder(snmpEngine, snmpContext) 55cmdrsp.NextCommandResponder(snmpEngine, snmpContext) 56 57# Register an imaginary never-ending job to keep I/O dispatcher running forever 58snmpEngine.transportDispatcher.jobStarted(1) 59 60# Run I/O dispatcher which would receive queries and send responses 61try: 62 snmpEngine.transportDispatcher.runDispatcher() 63except: 64 snmpEngine.transportDispatcher.closeDispatcher() 65 raise 66