Azure/HubAndSpokeResearchEnclave

Disable UDP port 65330 for outbound connections in custom image template

Open

#220 opened on Dec 7, 2025

View on GitHub
 (2 comments) (0 reactions) (0 assignees)Bicep (13 forks)auto 404
enhancementgood first issuespoke

Repository metrics

Stars
 (17 stars)
PR merge metrics
 (PR metrics pending)

Description

UDP port 65330 is a reserved port in Azure VNets.

Ref: https://techcommunity.microsoft.com/blog/coreinfrastructureandsecurityblog/unmasking-dns-timeouts-the-hidden-culprit-in-azure-virtual-networks/4250444

Contributor guide

Research direction
Locate the custom image template definition and add an outbound rule to block UDP port 65330.
Tech stack
None
Domain
infrastructure
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
AzureBicep
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65