DFL2500-MIB :: dfl2500SysPscTcpSyn

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › DFL2500-MIB › dfl2500SysPscTcpSyn

dfl2500SysPscTcpSyn

Module: DFL2500-MIB

OID (symbolic): DFL2500-MIB::dfl2500SysPscTcpSyn

OID (numeric): 1.3.6.1.4.1.171.20.1.5.1.2.1.6.1

Node type: OBJECT-TYPE

Type: Gauge32

Access: read-only

Description: Number of TCP connections in the SYN state.

What is dfl2500SysPscTcpSyn?

Current count of TCP connections sitting in the SYN (handshake not yet complete) state; watched alongside the Open/Fin counters, a disproportionate spike here is a classic sign of a SYN-flood attack.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.171.20.1.5.1.2.1.6.1
snmpwalk -v2c -c public <target> DFL2500-MIB::dfl2500SysPscTcpSyn

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.171.20.1.5.1.2.1.6.1.1
snmpget -v2c -c public <target> DFL2500-MIB::dfl2500SysPscTcpSyn.1

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OID Breakdown

Upper-level ancestors (9 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.171d_linkDE1500-MIB
1.3.6.1.4.1.171.20netdefendMgmtDFL1660-MIB
1.3.6.1.4.1.171.20.1ipsFirewallDFL210-MIB
Numeric OIDNameModule
1.3.6.1.4.1.171.20.1.5dfl2500DFL2500-MIB
1.3.6.1.4.1.171.20.1.5.1dfl2500OSDFL2500-MIB
1.3.6.1.4.1.171.20.1.5.1.2dfl2500OSStatsDFL2500-MIB
1.3.6.1.4.1.171.20.1.5.1.2.1dfl2500SystemDFL2500-MIB
1.3.6.1.4.1.171.20.1.5.1.2.1.6dfl2500SysPerStateCountersDFL2500-MIB
1.3.6.1.4.1.171.20.1.5.1.2.1.6.1dfl2500SysPscTcpSynDFL2500-MIB

Module

This MIB depends on