FTP EPSV error
Understanding FTP EPSV errors and how to resolve extended passive mode problems.
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Test whether the server allows directory listing with valid credentials.
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EPSV is an extended passive mode used by FTP clients.
Errors often occur when firewalls or servers do not support EPSV properly.
Common causes
- Server does not support EPSV
- Firewall blocking EPSV data ports
- Client misconfiguration
Fix checklist
- Disable EPSV in the client if unsupported.
- Verify firewall rules allow data ports.
- Ensure server supports EPSV commands.
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Related
- FTP passive mode firewall issues — Why FTP PASV fails behind firewalls/NAT and how to configure passive ports correctly.
- FTP data connection failed — Why FTP data connections fail and how to troubleshoot passive and active data channel issues.
- FTP directory listing timeout — Why FTP directory listings hang or timeout and how to resolve passive mode firewall problems.
- FTP passive mode not working — Why FTP passive mode fails and how to configure passive ports and NAT correctly.
- FTP timeout during transfer — Why FTP transfers timeout and how to fix idle timeout or firewall issues.
- FTP transfer stalls — Why FTP transfers stall mid-transfer and how to troubleshoot data channel issues.
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