VMware Workspace ONE UEM Tunnel: Troubleshooting DNS Related Issues
As an IT administrator, you may face issues with VMware Workspace ONE UEM Tunnel occasionally. In one such instance, users reported difficulty in connecting to applications through the VMware Tunnel, even though the VMware UAG Tunnel Edge Service showed a green sign indicating it was up and running. To troubleshoot this issue, I delved into the UAG Debug log and found several errors related to DNS. In this blog post, I will discuss the steps I took to resolve the issue and the causes of these DNS-related problems.
Symptoms of the Issue
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The symptoms of the issue were as follows:
* Users were unable to connect to applications through the VMware Tunnel.
* The UAG Tunnel Edge Service showed a green sign, indicating it was up and running.
* The UEM Tunnel Test Connection showed “No information to display” occasionally.
* The UAG Debug log showed errors related to DNS.
Troubleshooting Steps
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To troubleshoot the issue, I followed these steps:
Step 1: Check the UAG Debug Log
I checked the UAG Debug log and found several errors related to DNS. The errors were as follows:
* “DNS resolution failed for
* “Failed to resolve hostname
* “DNS query timed out for
Step 2: Check the Network Settings
I checked the network settings of the host running one of the DNS servers and found that the NIC was faulty. This was causing the DNS resolution to fail.
Step 3: Replace the Faulty NIC
To resolve the issue, I replaced the faulty NIC with a new one. This fixed the problem, and everything worked properly again.
Causes of the Issue
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The cause of the issue was the faulty NIC of the host running one of the DNS servers. The NIC was unable to resolve hostnames correctly, causing the UEM Tunnel to fail.
Conclusion
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In conclusion, if you face issues with VMware Workspace ONE UEM Tunnel related to DNS, you should check the network settings and ensure that the hosts running the DNS servers have proper network connectivity. Replacing faulty NICs can help resolve the issue quickly. Additionally, checking the UAG Debug log can provide valuable insights into the problem and help you identify the root cause of the issue.
FAQs
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1. Can I use a different DNS server other than the one provided by VMware?
Yes, you can use a different DNS server. However, ensure that the DNS server is properly configured and can resolve hostnames correctly.
2. How do I check the network settings of the hosts running the DNS servers?
You can check the network settings of the hosts running the DNS servers by accessing the network settings in the VMware Workspace ONE console.
3. What are some common errors related to DNS that I might encounter while troubleshooting UEM Tunnel issues?
Some common errors related to DNS that you might encounter while troubleshooting UEM Tunnel issues include “DNS resolution failed,” “Failed to resolve hostname,” and “DNS query timed out.”