Verified diagnostic signature
The FTP control or data connection was rejected by authentication, authorization, or network mode.
Match output from ftp, understand the likely cause, then continue with sourced, read-only checks.
- Confidence
- high
- Platforms
- linux · macos · windows
- Verified
- 2026-07-24
Recognized output
Signature matched locally
curl: \(67\) Access deniedOneLiners matches this pattern in your browser. Your pasted output is not stored or indexed.
Likely causes
What usually produces this signal
- Wrong credentials
- Account or path policy
- Passive data port blocked
- Server-side filesystem access
Safe next checks
Collect evidence before changing the system
Connect to a TCP service and read its banner with netcat
printf '\n' | nc -v -w 5 <host> <port>The output matches the expected target and exits without an error.
List files in a remote FTP directory with curl
curl --fail --show-error --list-only --user <username> ftp://<host>/<remote-path>/The output matches the expected target and exits without an error.