ProFTPD Developer's Guide: References

ProFTPD Version 1.2

RFCs (Request For Comments)

• RFC 959 - File Transfer Protocol
• RFC 1123 - Internet Host Requirements
• RFC 1579 - Firewall-friendly FTP
• RFC 1635 - How to Use Anonymous FTP
• RFC 1639 - FTP Operation Over Big Address Records
• RFC 2228 - FTP Security Extensions
• RFC 2389 - FTP Feature Negotiation
• RFC 2428 - IPv6 FTP Extensions
• RFC 2528 - X.509 PKI for FTP and HTTP
• RFC 2577 - FTP Security Considerations
• RFC 2640 - Internationalization of FTP

IETF Drafts
As IETF drafts expire, current drafts concerning the FTP protocol can always be found here.

• MLST Extensions
• SSL Authentication

Other Resources

• Dan J. Bernstein's description of the FTP protocol