mysterious connection breakdown - resolved

[Tino Schwarze]

On Tue, May 07, 2002 at 10:22:44AM +1000, Damien Miller wrote:

> > Hi there,
> > I was able to get things working. I do not get "Corrupted check bytes on
> > input" any more. I'm not sure what the cause was though. First, I
> > installed OpenSSH 3.1p1. Then, I explicitly disabled anything not
> > needed: ssh -2 -4 -a -n -T -x $host $script
> 
> Can you post a full debug trace "ssh -v -v -v host"? We can't really 
> debug if we don't see the full error.

Additional information: If I add "-n", everything works fine:
>----------------trace.sshbug.3----------------
From: root at agricola-gymnasium.de (Cron Daemon)
To: tisc at agricola-gymnasium.de
Subject: Cron <root at fserver> /root/bugtrace.ssh
X-Cron-Env: <MAILTO=tisc>
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>
Status: RO
Content-Length: 3982
Lines: 129

+++ 07.05,10:18 -   we currently execute this script:
#!/bin/bash
#
# test des SSH-Bugs

function log_event ()
{
	echo "+++ `date +%d.%m,%H:%M` - $*"
}

if [ "$1" = "remote" ] ; then
	log_event "    we're on the remote host."

	# just some random messages to produce output
	echo cleaning $MOVEDFILES
	echo cp /dev/null "$MOVEDFILES"
	echo cleaning $CHANGEDFILES
	echo cp /dev/null "$CHANGEDFILES"

	echo set -x
	set -x

	echo starting

	sleep 5

	log_event "    remote script ended."

	exit 0

fi

log_event "  we currently execute this script:"
cat $0

log_event "  copying script to remote host."
scp $0 www-intern:$0

log_event "  running script on remote host"

ssh -n -v -v -v www-intern $0 remote
# it works this way:
#ssh -2 -4 -a -n -T -x www-intern $0 remote

log_event "  done."
+++ 07.05,10:18 -   copying script to remote host.
+++ 07.05,10:18 -   running script on remote host
OpenSSH_3.1p1, SSH protocols 1.5/2.0, OpenSSL 0x0090601f
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Rhosts Authentication disabled, originating port will not be trusted.
debug1: restore_uid
debug1: ssh_connect: getuid 0 geteuid 0 anon 1
debug1: Connecting to www-intern [10.1.2.1] port 22.
debug1: temporarily_use_uid: 0/0 (e=0)
debug1: restore_uid
debug1: temporarily_use_uid: 0/0 (e=0)
debug1: restore_uid
debug1: Connection established.
debug1: read PEM private key done: type DSA
debug1: read PEM private key done: type RSA
debug1: identity file /root/.ssh/identity type 0
debug1: identity file /root/.ssh/id_rsa type 0
debug3: Not a RSA1 key file /root/.ssh/id_dsa.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: no key found
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: no key found
debug1: identity file /root/.ssh/id_dsa type 2
debug1: Remote protocol version 1.99, remote software version OpenSSH_3.1p1
debug1: match: OpenSSH_3.1p1 pat OpenSSH*
debug1: Local version string SSH-1.5-OpenSSH_3.1p1
debug1: Waiting for server public key.
debug1: Received server public key (768 bits) and host key (1024 bits).
debug3: check_host_in_hostfile: filename /root/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 1
debug3: check_host_in_hostfile: filename /root/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 1
debug1: Host 'www-intern' is known and matches the RSA1 host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug1: Encryption type: blowfish
debug1: Sent encrypted session key.
debug1: Installing crc compensation attack detector.
debug1: Received encrypted confirmation.
debug1: Trying RSA authentication with key '/root/.ssh/identity'
debug1: Received RSA challenge from server.
debug1: Sending response to host key RSA challenge.
debug1: Remote: RSA authentication accepted.
debug1: RSA authentication accepted by server.
debug3: clear hostkey 0
debug3: clear hostkey 1
debug3: clear hostkey 2
debug1: Sending command: /root/bugtrace.ssh remote
debug1: Entering interactive session.
debug2: fd 0 is O_NONBLOCK
debug1: fd 1 setting O_NONBLOCK
debug2: fd 2 is O_NONBLOCK
debug1: Sending eof.
+ echo starting
+ sleep 5
+++ 07.05,10:18 -     we're on the remote host.
cleaning
cp /dev/null 
cleaning
cp /dev/null 
set -x
starting
+ log_event '    remote script ended.'
++ date +%d.%m,%H:%M
+ echo '+++ 07.05,10:18 -     remote script ended.'
+ exit 0
debug1: fd 0 clearing O_NONBLOCK
debug1: fd 1 clearing O_NONBLOCK
debug2: fd 2 is not O_NONBLOCK
+++ 07.05,10:18 -     remote script ended.
debug1: Transferred: stdin 0, stdout 153, stderr 147 bytes in 5.0 seconds
debug1: Bytes per second: stdin 0.0, stdout 30.4, stderr 29.2
debug1: Exit status 0
+++ 07.05,10:18 -   done.
>----------------trace.sshbug.3----------------

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