Knowledge Base

Answers to real observability problems

Field notes and fixes from live engagements across PRTG, Cisco ThousandEyes, Splunk Observability and OpenTelemetry. Search a symptom, find the resolution.

PRTG

Network & infrastructure monitoring

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Cisco ThousandEyes

Internet & cloud path intelligence

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Splunk Observability

Full stack metrics, traces & logs

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OpenTelemetry

Vendor neutral instrumentation

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Latest articles

PRTG

PRTG SNMP Error -2003: how to troubleshoot "No Response" without guessing

PRTG SNMP error -2003 means the probe never received the expected SNMP response. It is not automatically a firewall problem. Here is the exact, Probe-first order to isolate the real cause: reachability, UDP 161, SNMP version, credentials, allowed-manager ACLs and the specific OID.

8 min readRead

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