Fix: SNMP request failed to send

application/src/main/resources/thingsboard.yml

@@ -1242,8 +1242,10 @@ transport:
   snmp:
     # Enable/disable SNMP transport protocol
     enabled: "${SNMP_ENABLED:true}"
+    # Snmp bind address
+    bind_address: "${SNMP_BIND_ADDRESS:0.0.0.0}"
     # Snmp bind port
-    bind_port: "${SNMP_BIND_PORT:1620}"
+    bind_port: "${SNMP_BIND_PORT:0}"
     response_processing:
       # parallelism level for executor (workStealingPool) that is responsible for handling responses from SNMP devices
       parallelism_level: "${SNMP_RESPONSE_PROCESSING_PARALLELISM_LEVEL:4}"

common/transport/snmp/src/main/java/org/thingsboard/server/transport/snmp/service/SnmpTransportService.java

@@ -67,6 +67,7 @@ import org.thingsboard.server.transport.snmp.session.DeviceSessionContext;
 import org.thingsboard.server.transport.snmp.session.ScheduledTask;
 
 import java.io.IOException;
+import java.net.InetAddress;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -97,8 +98,10 @@ public class SnmpTransportService implements TbTransportService, CommandResponde
     private final Map<SnmpCommunicationSpec, ResponseDataMapper> responseDataMappers = new EnumMap<>(SnmpCommunicationSpec.class);
     private final Map<SnmpCommunicationSpec, ResponseProcessor> responseProcessors = new EnumMap<>(SnmpCommunicationSpec.class);
 
-    @Value("${transport.snmp.bind_port:1620}")
+    @Value("${transport.snmp.bind_port:0}")
     private Integer snmpBindPort;
+    @Value("${transport.snmp.bind_address:0.0.0.0}")
+    private String snmpBindAddress;
     @Value("${transport.snmp.response_processing.parallelism_level:4}")
     private int responseProcessingThreadPoolSize;
     @Value("${transport.snmp.scheduler_thread_pool_size:4}")
@@ -134,10 +137,10 @@ public class SnmpTransportService implements TbTransportService, CommandResponde
         TransportMapping<?> transportMapping;
         switch (snmpUnderlyingProtocol) {
             case "udp":
-                transportMapping = new DefaultUdpTransportMapping(new UdpAddress(snmpBindPort));
+                transportMapping = new DefaultUdpTransportMapping(new UdpAddress(InetAddress.getByName(snmpBindAddress), snmpBindPort));
                 break;
             case "tcp":
-                transportMapping = new DefaultTcpTransportMapping(new TcpAddress(snmpBindPort));
+                transportMapping = new DefaultTcpTransportMapping(new TcpAddress(InetAddress.getByName(snmpBindAddress), snmpBindPort));
                 break;
             default:
                 throw new IllegalArgumentException("Underlying protocol " + snmpUnderlyingProtocol + " for SNMP is not supported");