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Port blocking and OpenSSH upgrade for ZStack Cloud

SolutionsZCF · CloudVersions4.8.x / 4.6.xArticle IDKB-200097Updated2026-09-16

Applicable scenario

  • Product: ZCF
  • Component: Cloud
  • Versions: 4.8.x, 4.6.x
  • Deployment topology: dual management nodes
  • Trigger: Security-scan remediation requires blocking high-risk ports and upgrading OpenSSH.

Symptoms

  • Block 5900, 5901, 5902, 3306, 7070, 9100, 9103, 9090, and 6379.
  • Upgrade OpenSSH components.
  • Incorrect port restrictions can affect internal service communication.

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Port blocking and OpenSSH upgrade for ZStack Cloud | KB-200097 | ZStack Resource Center