I subscribed to this list two days ago, didn't get any response. I posted a
message titled "ssh server immediately closing connection" on Sep 2 19:49:26
GMT 2020 which received questions as a response but I never got an email so I'm
having to reply with a new post - I'm sorry, I don't know what else to do. If
I need to re-submit a subscription request please let me know.
I was asked:
1) Please detail the windows service configuration.
$ cygrunsrv -V -Q cygsshd
Service : cygsshd
Display name : CYGWIN cygsshd
Current State : Running
Controls Accepted : Stop
Command : /usr/sbin/sshd -D
stdin path : /dev/null
stdout path : /var/log/cygsshd.log
stderr path : /var/log/cygsshd.log
Process Type : Own Process
Startup : Automatic
Dependencies : tcpip
Account : LocalSystem
Note: /var/log/cygsshd.log is zero length
C:\Windows\system32>sc qc cygsshd
[SC] QueryServiceConfig SUCCESS
SERVICE_NAME: cygsshd
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 2 AUTO_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : D:\cygwin\bin\cygrunsrv.exe
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : CYGWIN cygsshd
DEPENDENCIES : tcpip
SERVICE_START_NAME : LocalSystem
2) I see that you are running as cyg_server account. Please try as SYSTEM.
I got the same result running as system (note LocalSystem above)
3) Please confirm the issue is the same in the windows event log
Checking the log for a service with both a Local System and cyg_server, the
entries were identical in detail (abbreviated)
The description for Event ID 0 from source sshd cannot be found.
Running as LocalSystem:
[ UserID] S-1-5-18
sshd: PID 3103: fatal: seteuid 1050745: No such device or address
Running as cyg_server:
[ UserID] S-1-5-21-286763150-81293845-2154422431-1017
sshd: PID 3122: fatal: seteuid 1050745: No such device or address
I even tried running in "single instance mode" (or whatever it's called when
you run sshd directly from the terminal as I did previously) and launched
strace in an administrative command prompt (after determining the Windows pid
with ps -W). The result was a few zero return codes.
Leroy Tennison
Network Information/Cyber Security Specialist
E: [email protected]
2220 Bush Dr
McKinney, Texas
75070
www.datavoiceint.com
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