Skip to tutorial content
Rate module Not yet rated

Fixing Access and Port Failures

4 min read
On this page

In this lesson, you will learn:

  • What access failures look like
  • Common causes
  • How SNWR fixed WMI

🔁 Quick look back: Last time: Reading Errors and Discovery Logs. You learned how to read Discovery errors and sort failures.

1 The Problem: Two Windows Servers Don’t Answer

Two pilot servers answered ping but not WMI. The network rules were open. So:

  • The blocker had to be on the servers themselves.

🎯 The problem: Two Windows servers don’t answer the MID Server.

👉 The fix: Test the port from the MID host, find where it’s blocked, and ask the right owner to fix it.

Table of access failure causes.
Figure 1. Common causes of access failures.

2 Finding the blocker

  1. Test the port from the MID host.
  2. If it fails, check network rules first.
  3. If they’re open, check the host firewall.
  4. Retest after each fix.

3 Getting it fixed

Send the owner exact facts: source, target, port and the test result. Don’t ask them to ‘open everything’.

⭐ Remember: Fix access at the source. Never work around it by scanning from another zone.

4 Project Clear View: How We Implemented It

📍 Situation: Two pilot Windows servers didn’t answer WMI.

🧭 Decision: Test from the MID host and send Priya exact evidence.

🛠️ Steps we took:

  1. Tested port 135 from snwr-mid-test-01: blocked.
  2. Ravi confirmed network rules were open.
  3. Priya found the servers’ host firewall blocked remote WMI.
  4. Priya fixed it by policy, and you retested.

✅ What we verified:

  • Both servers now complete.
  • Priya fixed the policy for all servers, not just these two.

📁 Evidence: Troubleshooting log entries closed, with retest evidence.

5 Quick recap

  • Access failures mean the MID can’t reach the device.
  • Check network firewall, host firewall, device, then MID.
  • Send owners exact facts.
  • Fix at the source, don’t work around it.

6 Check yourself

Think of your answer first. Then tap to check.

1 Rules are open but the port is still blocked. What’s next? Show answer

Check the host firewall on the server.

2 What did Priya change? Show answer

The host firewall policy that blocked remote WMI.

3 Why not scan from another zone instead? Show answer

It hides the real problem and breaks the design.

Nice work! SNWR’s access failures are fixed. 🎉
Next up: Fixing Credential Failures

Was this lesson helpful?

Have a question or doubt?

Ask here and get help from instructors and fellow learners.

0 / 300

Only logged-in learners can post.