All MIBs › ALTEON-PRIVATE-MIBS › tcpStatHalfOpens
tcpStatHalfOpens
Module: ALTEON-PRIVATE-MIBS
OID (symbolic): ALTEON-PRIVATE-MIBS::tcpStatHalfOpens
OID (numeric): 1.3.6.1.4.1.1872.2.1.8.11.2
Node type: OBJECT-TYPE
Type: Gauge
Access: read-only
Description:
The total number of outstanding TCP connections have been half opened. This statistics is valid only when URL parsing has been truned on. It is incremented when the switch respond to TCP SYN packet and decremented upon receiving TCP SYN ACK packet from the requester.
What is tcpStatHalfOpens?
A gauge of TCP connections in half-open state (SYN received), read-only; only valid when URL parsing is enabled. Indicates slow clients or connection setup delays; engineers watch for SYN flood attacks. Example: 50.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1872.2.1.8.11.2 snmpwalk -v2c -c public <target> ALTEON-PRIVATE-MIBS::tcpStatHalfOpens
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.1872.2.1.8.11.2.1 snmpget -v2c -c public <target> ALTEON-PRIVATE-MIBS::tcpStatHalfOpens.1
SNMPv3 example:
snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> tcpStatHalfOpens.1
OID Breakdown
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | BIANCA-BRICK-PPP-MIB |
| 1.3.6 | dod | BIANCA-BRICK-PPP-MIB |
| 1.3.6.1 | internet | BIANCA-BRICK-PPP-MIB |
| 1.3.6.1.4 | private | BIANCA-BRICK-PPP-MIB |
| 1.3.6.1.4.1 | enterprises | ANIROOT-MIB |
| 1.3.6.1.4.1.1872 | alteon | ALTEON-PRIVATE-MIBS |
| 1.3.6.1.4.1.1872.2 | private_mibs | ALTEON-PRIVATE-MIBS |
| 1.3.6.1.4.1.1872.2.1 | switch | ALTEON-PRIVATE-MIBS |
| 1.3.6.1.4.1.1872.2.1.8 | stats | ALTEON-PRIVATE-MIBS |
| 1.3.6.1.4.1.1872.2.1.8.11 | tcpStats | ALTEON-PRIVATE-MIBS |
| 1.3.6.1.4.1.1872.2.1.8.11.2 | tcpStatHalfOpens | ALTEON-PRIVATE-MIBS |