DFL210-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › DFL210-MIB

Organization: D-Link Corporation

Last Updated: 2010-09-02

Category: VPN and Security, Vendor: D-Link

Description: Manages D-Link DFL-210 firewall appliance security policies, VPN, and network interfaces.

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What Is DFL210-MIB?

DFL210-MIB is a D-Link enterprise MIB for the DFL-210 series NetDefend firewall/UTM appliance, part of D-Link's security gateway product line built on the NetDefendOS platform. It exposes system-level performance and traffic data including CPU load, forwarded bit and packet rates, internal buffer usage, active connection counts, and protocol-specific session-state counters (TCP SYN, TCP open, TCP FIN, UDP, ICMP, and other), alongside per-interface statistics. Administrators use it to monitor the hardware/software health and load of the firewall -- tracking dfl210SysCpuLoad for CPU saturation, dfl210SysBuffUse for internal buffer pressure, and dfl210SysConns together with the per-protocol session counters to detect abnormal connection patterns such as a SYN flood (elevated dfl210SysPscTcpSyn relative to dfl210SysPscTcpOpen) -- central to catching performance degradation or attack conditions on the appliance. It is a self-contained vendor MIB but is layered on standard IF-MIB-style interface statistics for its per-interface counters. It is typically deployed on D-Link DFL-210 firewall appliances protecting small-to-midsize office or branch networks. Engineers can download the DFL210-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in DFL210-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

  • D-Link DFL-210 NetDefend firewall appliance

Monitoring Examples

An operator would poll dfl210SysCpuLoad and dfl210SysBuffUse together to see whether the firewall is under CPU or buffer pressure, and dfl210SysConns alongside dfl210SysPscTcpSyn versus dfl210SysPscTcpOpen to detect a potential SYN-flood attack where half-open connections vastly outnumber fully established ones. Comparing dfl210SysForwardedBits and dfl210SysForwardedPackets over time shows overall throughput trends, and a sudden drop despite steady dfl210SysConns could indicate a bottleneck. Walking dfl210IfStatsTable per interface would pinpoint which physical interface is carrying the anomalous load.

What Can Be Monitored

  • CPU load
  • forwarded bits/packets throughput
  • internal buffer usage
  • active connection count
  • per-protocol session counters (TCP SYN/open/FIN, UDP, ICMP)
  • per-interface traffic statistics
Imported Objects

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
enterprises

From SNMPv2-TC

DisplayString

How to Use in IPNetwork Monitor

Example using dfl210SysForwardedBits OID:

Select a D-Link DFL-210 NetDefend firewall appliance as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type dfl210SysForwardedBits into the Find box to locate it in the OID tree, then select it and click OK. The number of bits forwarded through the gateway. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

Monitors D-Link DFL-210 firewall appliance performance including CPU, memory, and connection statistics.

Start monitoring D-Link DFL-210 NetDefend firewall appliance with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download DFL210-MIB