I can't connect to an SMB share using my iPhone (iOS 15.3.1); when I try to connect to the same hostname, same port, same credentials on my Mac it works fine (I copy-pasted so there's no possibility for typos). What's wrong?

The server I have is a TrueNAS server (TrueNAS CORE 12.0-U8) using No-IP dynamic IP service, I tried using a different port, it didn't help. Also, the web interface of the server opens up fine, which proves

  1. the dynamic IP is indeed working
  2. the port 50080 is open.

I appreciate all the help.

  • Which version of iOS do you have? What is the version of your TrueNAS server? Could you increase the verbosity of the SMB server and check if you can find any hints in the logs?
    – jaume
    Mar 22 at 10:13
  • 1
    @jaume iOS 15.3.1, TrueNAS-12.0-U8. I just checked the logs in /var/log/samba4. I looked carefully at the file auth_audit.log as it seems to be the log file for all the incoming samba authentications. I attempted to connect with my iPhone and didn't see a such connection being recorded in the log file.
    – Léana 江
    Mar 22 at 18:21


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