FOTS1337 ssh_exchange_identification: read: EDC8121I Connection reset.

A discussion of Co:Z sftp, a port of OpenSSH sftp for z/OS
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DianaAsencio
Posts: 11
Joined: Thu Mar 16, 2017 2:11 pm

FOTS1337 ssh_exchange_identification: read: EDC8121I Connection reset.

Post by DianaAsencio » Fri Dec 21, 2018 11:50 am

Job was working until Thursday night.
ls -al
Co:Z SFTP version: 2.2.1 (5.0p1) 2012-10-08
Copyright (C) Dovetailed Technologies, LLC. 2011. All rights reserved.
Ý97.264¨ debug3: connect_to_server arg=/bin/ssh
..................
Ý97.264¨ debug3: connect_to_server arg=sftp
OpenSSH_6.4, OpenSSL 1.0.2h 3 May 2016
debug1: Reading configuration data /etc/ssh/ssh_config
............................................
debug1: Connection established.
debug1: cipher_init: none from source OpenSSL, used in non-FIPS mode
debug1: cipher_init: none from source OpenSSL, used in non-FIPS mode
debug3: timeout: 59310 ms remain after connect
.........................
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.4
debug3: __catgets: NLS setup complete (1), using message catalog openssh.cat

FOTS1337 ssh_exchange_identification: read: EDC8121I Connection reset. (errno2=0x76650446)


Please advise.
thanks

dovetail
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Posts: 1875
Joined: Thu Jul 29, 2004 12:12 pm

Re: FOTS1337 ssh_exchange_identification: read: EDC8121I Connection reset.

Post by dovetail » Sun Dec 23, 2018 10:48 am

This means that the connection made by z/OS OpenSSH was lost. It happened right at the beginning, when the client is trying to read the servers SSH hello/version string. The most common cause of this problem is a firewall issue.

DianaAsencio
Posts: 11
Joined: Thu Mar 16, 2017 2:11 pm

Re: FOTS1337 ssh_exchange_identification: read: EDC8121I Connection reset.

Post by DianaAsencio » Mon Dec 24, 2018 9:17 am

Good Morning and Happy Holidays !!!
Thank you for the reply, I assume you mean a firewall at the remote side?

dovetail
Site Admin
Posts: 1875
Joined: Thu Jul 29, 2004 12:12 pm

Re: FOTS1337 ssh_exchange_identification: read: EDC8121I Connection reset.

Post by dovetail » Thu Jan 03, 2019 3:55 pm

All that can be said is that the network connection was lost during the intial "hello" version-string exchange.
If the problem is a firewall, it is not possible to tell from this information where it was.

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