How to Fix "EAI_NONAME" Error in FileZilla – A Complete Guide

Table of Contents: Introduction & Root Cause 1. Verify Hostname & Spelling 2. Test DNS Resolution 3. Use IP Address Directly 4. Check for CDN/Proxy Issues Quick-Fix Summary Table

The "EAI_NONAME - Neither nodename nor servname provided, or not known" error in FileZilla FTP Client occurs when the hostname cannot be resolved to an IP address. This is a DNS issue, meaning your computer is unable to locate the FTP server[citation:1][citation:8].

In this guide, we will go through step-by-step troubleshooting to resolve this error, ensuring a smooth FTP connection.

What Causes the EAI_NONAME Error?

The error is fundamentally a name resolution error[citation:1]. Your system's DNS (Domain Name System) cannot convert the provided hostname (like ftp.yourdomain.com) into a numerical IP address that FileZilla can connect to. Common specific causes include:

• Incorrect or misspelled hostname: The most basic and frequent issue[citation:1].
• DNS misconfiguration or propagation delay: Your domain's DNS records may not be set up correctly, or recent changes may not have propagated worldwide[citation:1][citation:4].
• Interference from CDN/Proxy Services: Services like Cloudflare, when acting as a proxy for your subdomain, can block direct FTP connections[citation:4][citation:6].
• Expired domain: In rare cases, the domain name itself may have expired[citation:7].

1. Verify Your Hostname & Spelling

Always start with the simplest check. Confirm you are using the exact FTP hostname provided by your web host. This is often different from your website's main address[citation:4].

• Common patterns are ftp.yourdomain.com or a dedicated server address like server123.hosting.com.
• Double-check for typos, as even a single wrong character will cause this error[citation:1].
• Consult your hosting control panel (e.g., cPanel's "FTP Accounts" section) for the correct connection details[citation:4].

2. Test DNS Resolution

Before changing settings in FileZilla, test if your computer can resolve the hostname at all.

On Windows (Command Prompt)

nslookup ftp.yourdomain.com

Or use the ping command to see if it returns an IP address[citation:7][citation:9].

ping ftp.yourdomain.com

On Linux/macOS (Terminal)

dig ftp.yourdomain.com

or

host ftp.yourdomain.com

Expected Result: You should see an IP address in the output.
Error Result: Messages like "server can't find..." or "Host not found" confirm a DNS failure[citation:1].

3. Use the IP Address Instead of Hostname

This is the most effective and immediate workaround[citation:1][citation:4][citation:9]. Since the problem is DNS, bypass it entirely by connecting directly via the server's IP address.

1. Find your server's IP address in your hosting dashboard or by using the ping command as shown above.
2. In FileZilla's Site Manager, replace the "Host" field (e.g., ftp.yourdomain.com) with the IP address (e.g., 192.168.1.10).
3. Attempt to connect.

Why this works: If the connection succeeds with the IP but fails with the hostname, you have definitively confirmed the issue is with DNS resolution and not with your network or the FTP server itself[citation:1].

4. Check for CDN or Proxy Interference

If you use Cloudflare or another CDN, it may be causing the issue. These services often proxy web traffic but can interfere with FTP.

The solution is to ensure your FTP subdomain (e.g., ftp.yourdomain.com) is not proxied by the CDN[citation:4][citation:6].

• In your Cloudflare DNS settings, locate the DNS record for ftp (or your FTP hostname).
• Click to edit the record and toggle the Proxy status to "DNS only" (the cloud icon should turn grey). This is often called "grey-clouding"[citation:4].
• Save the changes. It may take a short time for this change to take effect.

Quick-Fix Summary Table

By systematically following these steps, you should be able to resolve the EAI_NONAME error and connect successfully. The most reliable long-term solution for a static server is often to simply use the IP address in FileZilla's Site Manager[citation:4].