The primary reason for this error is that the openssl s_client command uses the DNS (Domain Name System) to resolve the hostname of the server it's trying to connect to. If the DNS lookup fails, the connection attempt will fail with a 'No address associated with hostname' error.Another possible caus

How do I fix: Alternative Fix Method?

Step 1: Step 1: Use the --dns option with openssl s_client to specify an alternative DNS resolver. For example, you can use Google Public DNS by setting the 'dns' parameter to '8.8.8.8'.Step 2: Step 2: Try connecting to the server again using the modified command. If this resolves the issue, it's li

Software⏱️ 3 min read📅 2026-06-11

How to Fix: openssl s_client returns DNS error

Q: Best Solutions to Fix It Resolving DNS Issues?

Step 1: Step 1: Check your DNS settings. Ensure that your system's DNS settings are properly configured and up-to-date. You can do this by checking your system's network settings or using a third-party DNS service.Step 2: Step 2: Use the -showcerts option with openssl s_client to see if the certific

openssl s_client returns DNS error: No address associated with hostname

Quick Answer: Check if the system's DNS is configured correctly, as openssl relies on the system's DNS settings.

📋 Table of Contents

⚠️ Common Causes
✅ Best Solutions to Fix It
🎯 Final Words

openssl s_client returns DNS error when trying to connect to a site using openssl, but it works fine with other tools like wget or curl. This issue affects users who rely on openssl for secure connections.

This error can be frustrating as it prevents users from accessing their desired websites securely. However, don't worry - we're here to help you troubleshoot and resolve this issue.

⚠️ Common Causes

The primary reason for this error is that the openssl s_client command uses the DNS (Domain Name System) to resolve the hostname of the server it's trying to connect to. If the DNS lookup fails, the connection attempt will fail with a 'No address associated with hostname' error.
Another possible cause could be a misconfigured network or DNS settings on your system.

✅ Best Solutions to Fix It

Resolving DNS Issues

Step 1: Step 1: Check your DNS settings. Ensure that your system's DNS settings are properly configured and up-to-date. You can do this by checking your system's network settings or using a third-party DNS service.
Step 2: Step 2: Use the -showcerts option with openssl s_client to see if the certificate is being retrieved successfully. This will help you determine if the issue lies in the DNS lookup or the SSL/TLS handshake.
Step 3: Step 3: Try connecting to a different server using openssl s_client to rule out any issues with your system's configuration.

Alternative Fix Method

Step 1: Step 1: Use the --dns option with openssl s_client to specify an alternative DNS resolver. For example, you can use Google Public DNS by setting the 'dns' parameter to '8.8.8.8'.
Step 2: Step 2: Try connecting to the server again using the modified command. If this resolves the issue, it's likely that your system's default DNS settings were causing the problem.

🎯 Final Words

By following these steps and resolving any DNS issues, you should be able to successfully connect to websites using openssl s_client. Remember to always check your DNS settings and network configuration before trying to troubleshoot this issue.

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