Blocker Instead of normal message about unmatched trap like this:
1562:20141117:164856.535 unmatched trap received from [127.0.0.1]: 16:48:55 2014/11/17 PDU INFO: notificationtype TRAP version 0 receivedfrom UDP: [127.0.0.1]:45150->[127.0.0.1] errorstatus 0 messageid 0 community public transactionid 1 errorindex 0 requestid 0 VARBINDS: DISMAN-EVENT-MIB::sysUpTimeInstance type=67 value=Timeticks: (55) 0:00:00.55 SNMPv2-MIB::snmpTrapOID.0 type=6 value=OID: IF-MIB::linkUp.0.33 IF-MIB::linkUp type=4 value=STRING: "eth2" SNMP-COMMUNITY-MIB::snmpTrapCommunity.0 type=4 value=STRING: "public" SNMPv2-MIB::snmpTrapEnterprise.0 type=6 value=OID: IF-MIB::linkUp
I can see this in Zabbix server/proxy log file:
1) incorrect trap parsing 
:
27097:20141113:170456.632 invalid trap found [NG: "Minor" 27097:20141113:170549.560 invalid trap found [a Protector" 27097:20141113:170632.077 invalid trap found [ "public" 27097:20141113:170635.208 invalid trap found [ue=STRING: "public" 27097:20141113:170910.306 invalid trap found [Cannot open: ([3] The system cannot find the path specified. ) => not
2) lines without details about the unmatched trap:
28599:20141113:014648.727 unmatched trap received from [10.10.10.10]: 01:46:47 2014/11/13 PDU INFO: 28599:20141113:014648.743 unmatched trap received from [10.10.10.10]: 01:46:47 2014/11/13 PDU INFO: 28599:20141113:014718.792 unmatched trap received from [10.10.10.10]: 01:47:17 2014/11/13 PDU INFO: 28599:20141113:014718.808 unmatched trap received from [10.10.10.10]: 01:47:17 2014/11/13 PDU INFO: