On Feb 18 11:58, Enrico Forestieri wrote: > After upgrading to cygwin 3.0.0 (32bit version) on W7 64bit, it is > not possible to connect using ssh. The returned error is something > like "Connection closed by x.x.x.x port 22". > > I also tried the 2019-02-18 snapshot without success. > However, simply downgrading to 2.11.2 fixes the issue.
I tested this myself and from what I can tell, Microsoft didn't implement S4U for local accounts on WOW64 on older OSes. If I start a 32 bit sshd from an Windows 7 64 bit WOW64 environment, then domain accounts work fine using kerberos S4U, but for local accounts with MsV1_0 S4U the underlying Windows function returns STATUS_INVALID_PARAMETER. Note that this works fine in Windows 7 64 bit with 64 bit Cygwin. It seems only older WOW64 environments (maybe even only in W7) didn't implement this. Two workarounds for now: - Start sshd as 64 bit Cygwin process. - Utilize https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-nopasswd3 Corinna -- Corinna Vinschen Cygwin Maintainer
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