All MIBs › DNS-RESOLVER-MIB › dnsResCacheBadCaches
dnsResCacheBadCaches
Module: DNS-RESOLVER-MIB
OID (symbolic): DNS-RESOLVER-MIB::dnsResCacheBadCaches
OID (numeric): 1.3.6.1.2.1.32.2.1.4.4
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description:
Number of RRs the resolver has refused to cache because they appear to be dangerous or irrelevant. E.g., RRs with suspiciously high TTLs, unsolicited root information, or that just don't appear to be relevant to the question the resolver asked.
What is dnsResCacheBadCaches?
This counter increments whenever the DNS resolver refuses to cache a DNS resource record due to suspected security risks or irrelevance, such as records with suspiciously long expiration times or unsolicited root server information. High counts may indicate DNS poisoning attempts or misconfigured remote servers. Operators review this metric to detect potential DNS security threats or network problems.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.32.2.1.4.4 snmpwalk -v2c -c public <target> DNS-RESOLVER-MIB::dnsResCacheBadCaches
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.32.2.1.4.4.1 snmpget -v2c -c public <target> DNS-RESOLVER-MIB::dnsResCacheBadCaches.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 |
| 1.3.6.1.2 | mgmt | BKTEL-HFC862-BASE-MIB |
| 1.3.6.1.2.1 | mib_2 | CHECKPOINT-MIB-2 |
| 1.3.6.1.2.1.32 | dns | DNS-SERVER-MIB |
| 1.3.6.1.2.1.32.2 | dnsResMIB | DNS-RESOLVER-MIB |
| 1.3.6.1.2.1.32.2.1 | dnsResMIBObjects | DNS-RESOLVER-MIB |
| 1.3.6.1.2.1.32.2.1.4 | dnsResCache | DNS-RESOLVER-MIB |
| 1.3.6.1.2.1.32.2.1.4.4 | dnsResCacheBadCaches | DNS-RESOLVER-MIB |