Topic "SSL3 alert write issue after 5.7.7 upgrade"

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itservices
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Joined: 2016-04-18
Posts: 3
Location: Poland, OH
Since upgrading to version 5.7.7 we are experiencing the following error message when connecting to an FTP site using TLS/SSL Explicit encryption:

SSL3 alert write: fatal: handshake failure
TLS connect: error in error
Can't establish TLS connection
TLS connect: error in error
Disconnected from server
Connection failed.

Is there a setting that we need to change in the WinSCP client software that will allow us to connect successfully?
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martin
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Site Admin
Joined: 2002-12-10
Posts: 25015
Location: Prague, Czechia
What version were you using previously? Since version 5.6.2, WinSCP does not allow SSL 3.0 protocol by default.

You have to enable it in session settings:
https://winscp.net/eng/docs/ui_login_tls
itservices
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Joined: 2016-04-18
Posts: 3
Location: Poland, OH
I am not sure specifically which version we were previously using however most likely it was a version prior to 5.6.2. Which setting do I need to change on your link to allow SSL3? Maximum TLS/SSL version?
martin
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Site Admin
Joined: 2002-12-10
Posts: 25015
Location: Prague, Czechia
Minimum TLS/SSL version.
itservices
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Joined: 2016-04-18
Posts: 3
Location: Poland, OH
Thanks. Unfortunately changing the minimum TLS/SSL version to SSL3 did not resolve the issue. What's weird is that if we use Filezilla to connect we do not have the issue using the same settings.
martin
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Site Admin
Joined: 2002-12-10
Posts: 25015
Location: Prague, Czechia
What cipher does FileZilla use against your server?
Can you try to connect using WinSCP 5.7.6? If it works, please attach a session log file.
martin
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Site Admin
Joined: 2002-12-10
Posts: 25015
Location: Prague, Czechia
Possibly the same issue as here:
https://winscp.net/forum/viewtopic.php?t=22968
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