Immediate "Network Error: Software Caused Server To Abort, Will connect after clicking "Reconnect"

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bekadams
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Immediate "Network Error: Software Caused Server To Abort, Will connect after clicking "Reconnect"

I have had a strange issue arise recently.

I had no prior issues connecting to this SFTP server but as of the 4/21/2020, I receive the "Network error: Software Caused Server to Abort". If I say ok and try again, I get the same error. If I click "Reconnect", sometimes it takes two clicks but it will connect to the server fine.

My environment: Windows Server 2008 R2.
WinSCP: WinSCP_release_5.17.4 (uninstalled and reinstalled today)
I have uninstalled/reinstalled an older version that was working prior as well.

Log:
. 2020-04-24 23:21:26.959 --------------------------------------------------------------------------
. 2020-04-24 23:21:26.959 WinSCP Version 5.17.4 (Build 10410) (OS 6.1.7601 Service Pack 1 - Windows Server 2008 R2 Datacenter)
. 2020-04-24 23:21:26.959 Configuration: HKCU\Software\Martin Prikryl\WinSCP 2\
. 2020-04-24 23:21:26.959 Log level: Debug 2
. 2020-04-24 23:21:26.959 Local account: "Removed"
. 2020-04-24 23:21:26.959 Working directory: C:\Program Files (x86)\WinSCP
. 2020-04-24 23:21:26.959 Process ID: 3852
. 2020-04-24 23:21:26.959 Command-line: "C:\Program Files (x86)\WinSCP\WinSCP.exe"
. 2020-04-24 23:21:26.959 Time zone: Current: GMT+0 (Coordinated Universal Time), No DST
. 2020-04-24 23:21:26.959 Login time: Friday, April 24, 2020 11:21:26 PM
. 2020-04-24 23:21:26.959 --------------------------------------------------------------------------
. 2020-04-24 23:21:26.959 Session name: "Removed Name" (Site)
. 2020-04-24 23:21:26.959 Host name: "Removed HostName" (Port: 22)
. 2020-04-24 23:21:26.959 User name: "Removed Username" (Password: Yes, Key file: No, Passphrase: No)
. 2020-04-24 23:21:26.959 Tunnel: No
. 2020-04-24 23:21:26.959 Transfer Protocol: SFTP (SCP)
. 2020-04-24 23:21:26.959 Ping type: Off, Ping interval: 30 sec; Timeout: 15 sec
. 2020-04-24 23:21:26.959 Disable Nagle: No
. 2020-04-24 23:21:26.959 Proxy: None
. 2020-04-24 23:21:26.959 Send buffer: 262144
. 2020-04-24 23:21:26.959 SSH protocol version: 2; Compression: No
. 2020-04-24 23:21:26.959 Bypass authentication: No
. 2020-04-24 23:21:26.959 Try agent: Yes; Agent forwarding: No; TIS/CryptoCard: No; KI: Yes; GSSAPI: Yes
. 2020-04-24 23:21:26.959 GSSAPI: Forwarding: No; Libs: gssapi32,sspi,custom; Custom:
. 2020-04-24 23:21:26.959 Ciphers: aes,chacha20,blowfish,3des,WARN,arcfour,des; Ssh2DES: No
. 2020-04-24 23:21:26.959 KEX: ecdh,dh-gex-sha1,dh-group14-sha1,rsa,WARN,dh-group1-sha1
. 2020-04-24 23:21:26.959 SSH Bugs: Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto
. 2020-04-24 23:21:26.959 Simple channel: Yes
. 2020-04-24 23:21:26.959 Return code variable: Autodetect; Lookup user groups: Auto
. 2020-04-24 23:21:26.959 Shell: default
. 2020-04-24 23:21:26.959 EOL: LF, UTF: Auto
. 2020-04-24 23:21:26.959 Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes; Follow directory symlinks: No
. 2020-04-24 23:21:26.959 LS: ls -la, Ign LS warn: Yes, Scp1 Comp: No; Exit code 1 is error: No
. 2020-04-24 23:21:26.959 SFTP Bugs: Auto,Auto
. 2020-04-24 23:21:26.959 SFTP Server: default
. 2020-04-24 23:21:26.959 Local directory: C:\Users\User1\Documents, Remote directory: /home/**removed**, Update: Yes, Cache: Yes
. 2020-04-24 23:21:26.959 Cache directory changes: Yes, Permanent: Yes
. 2020-04-24 23:21:26.959 Recycle bin: Delete to: No, Overwritten to: No, Bin path:
. 2020-04-24 23:21:26.959 DST mode: Unix
. 2020-04-24 23:21:26.959 --------------------------------------------------------------------------
. 2020-04-24 23:21:26.990 Looking up host "sftp.sitenameremoved.com" for SSH connection
. 2020-04-24 23:21:26.990 Connecting to "IP removed" port 22
. 2020-04-24 23:21:27.021 Selecting events 63 for socket 1972
. 2020-04-24 23:21:27.037 Waiting for the server to continue with the initialization
. 2020-04-24 23:21:27.037 Looking for incoming data
. 2020-04-24 23:21:27.037 Looking for network events
. 2020-04-24 23:21:27.037 We claim version: SSH-2.0-WinSCP_release_5.17.4
. 2020-04-24 23:21:27.037 Detected network event
. 2020-04-24 23:21:27.037 Enumerating network events for socket 1972
. 2020-04-24 23:21:27.037 Enumerated 18 network events making 18 cumulative events for socket 1972
. 2020-04-24 23:21:27.037 Handling network write event on socket 1972 with error 0
. 2020-04-24 23:21:27.037 Handling network connect event on socket 1972 with error 0
. 2020-04-24 23:21:27.037 Looking for network events
. 2020-04-24 23:21:27.052 Detected network event
. 2020-04-24 23:21:27.052 Enumerating network events for socket 1972
. 2020-04-24 23:21:27.052 Enumerated 32 network events making 32 cumulative events for socket 1972
. 2020-04-24 23:21:27.052 Handling network close event on socket 1972 with error 10053
. 2020-04-24 23:21:27.052 Selecting events 0 for socket 1972
. 2020-04-24 23:21:27.052 Network error: Software caused connection abort
* 2020-04-24 23:21:27.083 (EFatal) Network error: Software caused connection abort

I tried Filezilla to see if it would connect and it would not. I tried Cyberduck and it worked without error. I would prefer to use WinSCP.

Any thoughts as to why this is happening?

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martin
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Re: Immediate "Network Error: Software Caused Server To Abort, Will connect after clicking "Reconnect"

Can you post a Cyberduck log file?

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