cannot falback ipv6 to ipv4

My LAN support ipv6 closed network.
This environment cannot connect global ipv6 sites.
WinSCP version 4.3.2 doesnt fallback to ipv4.

Are you able to connect with PuTTY?

YES,I'm able to connect with PuTTY.(Ver 0.6.0)
setting: protocol auto(UNSPEC)

Can you send me an email, so I can send you back a debug version of WinSCP to track the problem? Please include link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.

I have a similar problem. The host I want to connect to has IPv4 and IPv6 but when its sshd only listen to IPv4 I get "connection refused" error if I use "auto" internet protocol version. Putty 0.60 has no problems to connect.

glx wrote:

I have a similar problem. The host I want to connect to has IPv4 and IPv6 but when its sshd only listen to IPv4 I get "connection refused" error if I use "auto" internet protocol version. Putty 0.60 has no problems to connect.

I have sent you an email.

This bug has been added to the tracker:
https://winscp.net/tracker/707