NetXMS Support Forum

Hello all,

I'm new here so please be nice

I've just installed a netXMS server on my network (192.168.88.0/24). It works as intended with all nodes in SNMP V3 sending traps.
Now I'm trying to add my QNAP NAS that is on a separated network (192.168.89.0/24).

Using SNMPV1, it works. I received traps.
But if I try to activate SNMP V3, pulling is working, but the traps aren't.
The QNAP is first sending a "get-request" on port UDP 162
Frame 76985: Packet, 123 bytes on wire (984 bits), 123 bytes captured (984 bits) on interface \Device\NPF_{C16F6D7C-17E5-4278-B0F9-851AEB13E1D9}, id 0
Internet Protocol Version 4, Src: 192.168.89.9, Dst: 192.168.88.32
    0100 .... = Version: 4
    .... 0101 = Header Length: 20 bytes (5)
    Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
    Total Length: 109
    Identification: 0x0f6c (3948)
    010. .... = Flags: 0x2, Don't fragment
    ...0 0000 0000 0000 = Fragment Offset: 0
    Time to Live: 63
    Protocol: UDP (17)
    Header Checksum: 0xf999 [validation disabled]
    [Header checksum status: Unverified]
    Source Address: 192.168.89.9
    Destination Address: 192.168.88.32
    [Stream index: 15]
User Datagram Protocol, Src Port: 40299, Dst Port: 162
    Source Port: 40299
    Destination Port: 162
    Length: 89
    Checksum: 0x8a97 [unverified]
    [Checksum Status: Unverified]
    [Stream index: 2066]
    [Stream Packet Number: 6]
    [Timestamps]
        [Time since first frame: 5.005006100 seconds]
        [Time since previous frame: 1.000912100 seconds]
    UDP payload (81 bytes)
Simple Network Management Protocol
    msgVersion: snmpv3 (3)
    msgGlobalData
        msgID: 1009582008
        msgMaxSize: 65507
        msgFlags: 04
            .... .1.. = Reportable: Set
            .... ..0. = Encrypted: Not set
            .... ...0 = Authenticated: Not set
        msgSecurityModel: USM (3)
    msgAuthoritativeEngineID: <MISSING>
    msgAuthoritativeEngineBoots: 0
    msgAuthoritativeEngineTime: 0
    msgUserName: <MISSING>
    msgAuthenticationParameters: <MISSING>
    msgPrivacyParameters: <MISSING>
    msgData: plaintext (0)
        plaintext
            contextEngineID: 80001f8880b35b0f3ea69ec76a00000000
                1... .... = Engine ID Conformance: RFC3411 (SNMPv3)
                Engine Enterprise ID: net-snmp (8072)
                Engine ID Format: Reserved/Enterprise-specific (128): Net-SNMP Random
                Engine ID Data: b35b0f3e
                Engine ID Data: Creation Time: Oct  8, 2026 15:46:14 Romance Daylight Time
            contextName: <MISSING>
            data: get-request (0)
                get-request
                    request-id: 59606151
                    error-status: noError (0)
                    error-index: 0
                    variable-bindings: 0 items
This get-request is ignored by netXMS
2026.10.08 16:12:27.977 *D* [snmp.trap          ] SNMPTrapReceiver: looking for SNMP security context for node 192.168.89.9 NAS Camera
2026.10.08 16:12:27.977 *D* [snmp.trap          ] SNMPTrapReceiver: received PDU of type 0 from 192.168.89.9
2026.10.08 16:12:27.977 *D* [snmp.trap          ] SNMPTrapReceiver: SNMP credential validation failed for trap from 192.168.89.9, dropping
2026.10.08 16:12:27.977 *D* [obj.macro          ] ExpandText(sourceObject=451 template='SNMP trap from %<sourceIP> rejected: %<reason> (SNMP version %<snmpVersion>)' alarm=0 event=1245 instance='(null)')
2026.10.08 16:12:27.977 *D* [event.corr         ] CorrelateEvent: event SYS_SNMP_TRAP_AUTH_FAILURE id 1245 source NAS Camera [451]
2026.10.08 16:12:27.977 *D* [event.corr         ] CorrelateEvent: finished, rootId=0
2026.10.08 16:12:27.977 *D* [event.proc         ] EVENT SYS_SNMP_TRAP_AUTH_FAILURE [170] at {0} (ID:1245 F:0x0001 S:1 TAGS:"") FROM NAS Camera: SNMP trap from 192.168.89.9 rejected: USM user name does not match (SNMP version 3)
2026.10.08 16:12:27.977 *D* [event.policy       ] EPP: processing event 1245
2026.10.08 16:12:27.977 *D* [event.policy       ] Event 1245 match EPP rule 55
2026.10.08 16:12:27.977 *D* [obj.macro          ] ExpandText(sourceObject=451 template='SNMP_TRAP_AUTH_FAILURE_%i' alarm=0 event=1245 instance='(null)')
2026.10.08 16:12:27.977 *D* [obj.macro          ] ExpandText(sourceObject=451 template='%m' alarm=0 event=1245 instance='(null)')
2026.10.08 16:12:27.977 *D* [obj.macro          ] ExpandText(sourceObject=451 template='' alarm=0 event=1245 instance='(null)')

If you have any idea about what is wrong in here, your help is welcome