mod_sftp does not support OpenSSH-specific private key format · Issue #793 · proftpd/proftpd · GitHub
Can't use sftp public key authentication with Proftpd, but with ssh it works · Issue #1400 · proftpd/proftpd · GitHub
Support customizing SSH ciphers, digests, key exchanges via SFTPClientMatch · Issue #1444 · proftpd/proftpd · GitHub
![Can't use sftp public key authentication with Proftpd, but with ssh it works · Issue #1400 · proftpd/proftpd · GitHub Can't use sftp public key authentication with Proftpd, but with ssh it works · Issue #1400 · proftpd/proftpd · GitHub](https://user-images.githubusercontent.com/26062939/156184588-57c968cd-babc-425c-bdab-bb53e91ced00.png)
Can't use sftp public key authentication with Proftpd, but with ssh it works · Issue #1400 · proftpd/proftpd · GitHub
SSH key exchanges fail unexpectedly with "unable to write X bytes of raw data" errors due to small ProFTPD buffer · Issue #1694 · proftpd/proftpd · GitHub
ProFTPD 1.3.7rc4 : SFTP authentication via 'rsa-sha2-512' public key failed · Issue #990 · proftpd/proftpd · GitHub
![FTP-Server unter Linux: Schnell, aber nicht ungefährlich - Pro und Contra: FTP-Server, SFTP- & NFS-Server für Linux im Überblick - TecChannel Workshop FTP-Server unter Linux: Schnell, aber nicht ungefährlich - Pro und Contra: FTP-Server, SFTP- & NFS-Server für Linux im Überblick - TecChannel Workshop](https://images.tecchannel.de/bdb/2646883/840x473.jpg)