Troubleshooting Guide

This guide provides technical procedures for diagnosing and resolving issues with NetFlow Optimizer (NFO) and the External Data Feeder for NFO (EDFN).

Identify your symptom in the categories below and go directly to the relevant page.

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Self-Service Triage

📄️ Connectivity & Firewalls

Cannot log in to the Web UI, NFO processes are not starting, or exporters cannot reach the NFO port. Covers Tomcat and NFO port verification, ufw/firewalld rules, and OS-level packet rejection.

📄️ EDFN is Unavailable

Enrichment data is missing or stale, cloud flow log ingestion has stopped, or the EDFN agent is not responding. Covers agent connectivity, authentication, and restart procedures.

📄️ Logs & Diagnostics

Unexpected system behavior or preparing to contact NetFlow Logic Support. Covers the NFO Status page, internal log access, the Download Logs bundle, and log rotation settings.

📄️ Data Quality & Performance

Status page shows Drops, data is missing in your SIEM, or traffic volume seems inaccurate. Covers input/output queue overflows, timestamp accuracy, and deduplication logic.

📄️ SNMP & Discovery

SNMP Information Monitor shows no data, or the Auto-discovery Reporter is empty. Covers SNMP reachability testing, OID and MIB verification, and EDFN connectivity for discovery.

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Quick Verification

If you have just installed NFO, run these commands to confirm the core engine is healthy:

Component	Port	Verification Command
Web UI	8443	netstat -npl | grep 8443
NFO Engine	9995*	tcpdump -i any udp port 9995
Control Link	20047	netstat -an | grep 20047

*Default port — check your Input configuration if customized.

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Still Need Help?

If you cannot resolve your issue using this guide:

1. Generate a diagnostic bundle via Tracing and Configuration > Download Logs.
2. Open a support ticket at the NetFlow Logic Support Portal.
3. Attach the diagnostic bundle to your ticket for faster resolution.