[Proftpd-user] tls openssl unexpected error

Hi,

After a recent upgrade, I'm seeing this in the proftp tls log:

2020-07-07 16:29:29,071 mod_tls/2.9[177480]: TLS/TLS-C requested, starting TLS handshake
2020-07-07 16:29:29,091 mod_tls/2.9[177480]: TLSv1 connection accepted, using cipher AES256-SHA (256 bits)
2020-07-07 16:29:29,115 mod_tls/2.9[177480]: Protection set to Private
2020-07-07 16:29:29,153 mod_tls/2.9[175468]: TLSv1 data connection accepted, using cipher AES256-SHA (256 bits)
2020-07-07 16:29:29,154 mod_tls/2.9[175468]: panic: SSL_ERROR_SYSCALL, line 10316: system error: Broken pipe
2020-07-07 16:29:29,154 mod_tls/2.9[175468]: unexpected OpenSSL error, disconnecting
2020-07-07 16:30:29,194 mod_tls/2.9[177401]: unable to accept TLS connection: system call error: [0] Success
2020-07-07 16:30:29,194 mod_tls/2.9[177401]: unable to open data connection: TLS negotiation failed

This happens on a regular basis but not all the time (with the same FTP client).

What can I try?

Regards,

Vieri


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