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Status Is a defect
Workspace SevOne
Categories Dedicated NetFlow Collector (DNC)
Created by Guest
Created on Apr 24, 2026

RELATED IDEAS

SevOne: Expand Default NetFlow Port Allowlist and Improve Firewall Documentation

Problem Statement

Current NetFlow configurations may require modification or disabling of the host Linux firewall when using commonly deployed UDP ports. This introduces unnecessary operational overhead and can lead to avoidable support cases and delays during deployment or upgrades.

Proposed Enhancement

  • Expand the default inbound UDP port allowlist for NetFlow to include standards-based and commonly used ports (see attached).
  • Eliminate the need for manual firewall changes in typical deployment scenarios.

Documentation Improvements

  • Clearly document the default firewall-enabled ports in NMS documentation.
  • Add cross-references from all configurable port settings (e.g., FlowFalcon Port) to the firewall documentation.
  • Include inline guidance near the FlowFalcon Port configuration in the NMS UI, highlighting any firewall considerations, with direct links to relevant documentation.
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Idea priority Low
  • Admin
    Ryan Wilson
    Apr 24, 2026

    This is a documentation defect. I'll ask for enhancements be made to make it clearer the role the firewall rules have here as well as generic guidance that the rules require an update if customers want to use different ports for Netflow collection. We will not change the default port list.

    Reply

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