All MIBs › CISCO-UNIFIED-FIREWALL-MIB › cufwAppConnNumHalfOpen
cufwAppConnNumHalfOpen
Module: CISCO-UNIFIED-FIREWALL-MIB
OID (symbolic): CISCO-UNIFIED-FIREWALL-MIB::cufwAppConnNumHalfOpen
OID (numeric): 1.3.6.1.4.1.9.9.491.1.1.4.2.1.6
Node type: OBJECT-TYPE
Type: Gauge32
Access: read-only
Description: The number of connections that are currently in the process of being established, corresponding to the protocol denoted by 'cufwAppConnProtocol'.
What is cufwAppConnNumHalfOpen?
This Gauge32, in Connections, reports how many connections for the protocol denoted by cufwAppConnProtocol are currently mid-handshake and not yet fully established. Because it's a gauge rather than a counter, an admin can watch it in real time to gauge how much in-flight connection-setup load the firewall is carrying for that protocol. A value that stays abnormally high for a TCP-based protocol row, for example, could indicate a SYN-flood style condition where many handshakes are being initiated but never completed.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.9.9.491.1.1.4.2.1.6 snmpwalk -v2c -c public <target> CISCO-UNIFIED-FIREWALL-MIB::cufwAppConnNumHalfOpen
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.9.9.491.1.1.4.2.1.6.1 snmpget -v2c -c public <target> CISCO-UNIFIED-FIREWALL-MIB::cufwAppConnNumHalfOpen.1
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OID Breakdown
Upper-level ancestors (8 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.9 | cisco | CAT2600-MIB |
| 1.3.6.1.4.1.9.9 | ciscoMgmt | CISCO-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.9.9.491 | ciscoUnifiedFirewallMIB | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1 | ciscoUnifiedFirewallMIBObjects | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1.1 | cuFwConnectionGrp | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1.1.4 | cuFwConnectionSummaryTables | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1.1.4.2 | cufwAppConnSummaryTable | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1.1.4.2.1 | cufwAppConnSummaryEntry | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1.1.4.2.1.6 | cufwAppConnNumHalfOpen | CISCO-UNIFIED-FIREWALL-MIB |