proftpd
ProFTPD (proftpd) is an open-source FTP server software that lets you run FTP services, configure virtual hosts/accounts, and manage file transfers over FTP (and typically FTP over TLS depending on configuration).
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Security depends on configuration: FTP credentials are typically vulnerable if used without TLS/FTPS. If configured with TLS (FTPS), credentials and session can be protected, but least-privilege filesystem permissions and strict access controls remain critical. Scope-like fine-grained authorization is generally limited compared to modern API auth models.
⚡ Reliability
Best When
You need a classic FTP server for legacy compatibility and you can securely configure it (access restrictions, TLS where appropriate, least-privilege filesystem permissions).
Avoid When
You need secure-by-default authentication/authorization flows for untrusted clients, or you cannot apply network hardening and TLS policy for credential protection.
Use Cases
- • Self-hosted FTP for legacy clients and workflows
- • On-prem file transfer endpoints for applications/integrations that require FTP
- • Controlled upload/download access using local user accounts and directory permissions
- • Migration/compatibility deployments where SFTP/HTTPS are not viable
Not For
- • Internet-facing deployments without strong network controls and secure transfer configuration
- • Modern systems that can use SFTP, FTPS with strict policy, or HTTPS APIs instead
- • Use cases requiring fine-grained API-level access control or audit/event streaming beyond FTP logs
Interface
Authentication
Authentication is typically via FTP login (often using system users or configured credentials), with authorization controlled via configuration and filesystem permissions. OAuth/scopes are not applicable.
Pricing
Open-source; operational cost is infrastructure/admin time.
Agent Metadata
Known Gotchas
- ⚠ FTP is stateful and not designed for agentic/API-style workflows; agents may need to manage sessions, passive/active mode, and network traversal quirks.
- ⚠ Security posture depends heavily on server configuration (TLS/FTPS, allowed ciphers, permitted users, directory permissions).
- ⚠ Idempotency is not inherent to FTP operations; re-uploads/downloads may overwrite unless safeguards are configured.
Alternatives
Full Evaluation Report
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Scores are editorial opinions as of 2026-04-04.