All MIBs › OPENBSD-PF-MIB › pfCntProtoCksum
pfCntProtoCksum
Module: OPENBSD-PF-MIB
OID (symbolic): OPENBSD-PF-MIB::pfCntProtoCksum
OID (numeric): 1.3.6.1.4.1.30155.1.2.10
Node type: OBJECT-TYPE
Type: Counter64
Access: read-only
Description: The number of packets that were dropped due to memory limitations.
What is pfCntProtoCksum?
NOTE: the source MIB's DESCRIPTION text for this object is identical to pfCntMemory's ('dropped due to memory limitations'), which is a copy-paste error - OpenBSD's own pf statistics (pfctl -s info) label this counter 'proto-cksum' for packets dropped due to a bad protocol-layer checksum (e.g. TCP/UDP checksum failure), and the object's position in the MIB (between IP-option and state-mismatch drops) matches that meaning, not a memory-limit meaning. Treat a rising value as a sign of corrupted or spoofed packets reaching the firewall, not memory pressure.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.30155.1.2.10 snmpwalk -v2c -c public <target> OPENBSD-PF-MIB::pfCntProtoCksum
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.30155.1.2.10.1 snmpget -v2c -c public <target> OPENBSD-PF-MIB::pfCntProtoCksum.1
SNMPv3 example:
snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> pfCntProtoCksum.1
Start monitoring OpenBSD firewall/router host (pf packet filter statistics) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the OPENBSD-PF-MIB::pfCntProtoCksum OID value, configure state conditions and alerts, and monitor any OpenBSD firewall/router host (pf packet filter statistics) from a single console.
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 |
| 1.3.6.1.4.1.30155 | openBSD | OPENBSD-BASE-MIB |
| 1.3.6.1.4.1.30155.1 | pfMIBObjects | OPENBSD-BASE-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.30155.1.2 | pfCounters | OPENBSD-PF-MIB |
| 1.3.6.1.4.1.30155.1.2.10 | pfCntProtoCksum | OPENBSD-PF-MIB |