I am having trouble connecting to a FTPS server using WinSCP 5.5.1 (Build 3970), with Explicit TLS/SSL. I have tried all options of the min+max SSL/TLS version setting. The connection goes like this:
220-FileZilla Server version 0.9.41 beta
220-written by Tim Kosse (Tim.Kosse@gmx.de)
220 Please visit http://sourceforge.net/projects/filezilla/
234 Using authentication type TLS
(now client sends packet with content X to server)
(client waits for 15 seconds default)
(client sends packet with content Y to server, immediately closes TCP by FIN+ACK)
According to my wireshark debugging:
X concat Y = Client Hello
X ends with character hex 0x0A
I *think* the trouble here is that WinSCP incorrectly sends only part of the SSL/TLS Client Hello when it sees the supposedly-end-of-line character.
Do you need any more info?
Thank you for your help.
Running on Windows 7 Enterprise SP1, 32-bit.
Attached sample packet dump, IP addresses have been anonymized.