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Date: Wed, 02 Sep 2009 14:08:06 -0700
To: cygwin AT cygwin DOT com
From: jeffunit <jeff AT jeffunit DOT com>
Subject: Re: ssh and sftp connects intermittently
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At 02:02 PM 9/2/2009, you wrote:
>On 09/02/2009 04:30 PM, jeffunit wrote:
>>As I said, the problem is intermittent. However, once I have the problem,
>>it occurs reliably. Here is some verbose output, which isn't very
>>helpful...
>
>Perhaps.  I find this interesting though.
>
>>U:\>sftp -v -v -v jdeifik AT www DOT weasel DOT com
>>Connecting to www.weasel.com...
>>OpenSSH_5.1p1, OpenSSL 0.9.8k 25 Mar 2009
>>debug2: ssh_connect: needpriv 0
>>debug1: Connecting to www.weasel.com [208.97.189.139] port 22.
>
>If I do the same thing, though I'm in bash, I get this line first:
>
>debug1: Reading configuration data /etc/ssh_config
>
>>I have to use control-C to stop this, as it hangs after the 'connecting
>>to' line.
>>
>>This problem is independent of where I am connecting to.
>
>Really.  So you could debug on the server side then and see if there's
>any interaction.  If not, it sounds like this is a problem with an
>outgoing firewall block or other BLODA <http://cygwin.com/acronyms/#BLODA>.

Here is some output when run with bash.
The first output successfully connects, the second one hangs.
Since this issue is intermittent, I suspect it might not be a BLODA issue...

phenomii:/cygdrive/u:501: ssh -v -v -v jdeifik AT www DOT weasel DOT com
OpenSSH_5.1p1, OpenSSL 0.9.8k 25 Mar 2009
debug2: ssh_connect: needpriv 0
debug1: Connecting to www.weasel.com [208.97.189.139] port 22.
debug1: Connection established.
debug1: identity file /home/jdeifik/.ssh/identity type -1
debug1: identity file /home/jdeifik/.ssh/id_rsa type -1
debug1: identity file /home/jdeifik/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1
debug1: match: OpenSSH_5.1p1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.1
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-
roup-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour
28,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc AT lysator DOT liu DOT se,aes128-
tr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour
28,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc AT lysator DOT liu DOT se,aes128-
tr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64 AT openssh DOT com,hmac-ripemd16
,hmac-ripemd160 AT openssh DOT com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64 AT openssh DOT com,hmac-ripemd16
,hmac-ripemd160 AT openssh DOT com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib AT openssh DOT com,zlib
debug2: kex_parse_kexinit: none,zlib AT openssh DOT com,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-
roup-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour
28,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc AT lysator DOT liu DOT se,aes128-
tr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour
28,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc AT lysator DOT liu DOT se,aes128-
tr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64 AT openssh DOT com,hmac-ripemd16
,hmac-ripemd160 AT openssh DOT com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64 AT openssh DOT com,hmac-ripemd16
,hmac-ripemd160 AT openssh DOT com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib AT openssh DOT com
debug2: kex_parse_kexinit: none,zlib AT openssh DOT com
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_setup: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug2: dh_gen_key: priv key bits set: 124/256
debug2: bits set: 473/1024
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /home/jdeifik/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 2
debug3: check_host_in_hostfile: filename /home/jdeifik/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 2
debug1: Host 'www.weasel.com' is known and matches the RSA host key.
debug1: Found key in /home/jdeifik/.ssh/known_hosts:2
debug2: bits set: 529/1024
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /home/jdeifik/.ssh/identity (0x0)
debug2: key: /home/jdeifik/.ssh/id_rsa (0x0)
debug2: key: /home/jdeifik/.ssh/id_dsa (0x0)
debug1: Authentications that can continue: publickey,password,keyboard-interact
ve
debug3: start over, passed a different list publickey,password,keyboard-interac
ive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/jdeifik/.ssh/identity
debug3: no such identity: /home/jdeifik/.ssh/identity
debug1: Trying private key: /home/jdeifik/.ssh/id_rsa
debug3: no such identity: /home/jdeifik/.ssh/id_rsa
debug1: Trying private key: /home/jdeifik/.ssh/id_dsa
debug3: no such identity: /home/jdeifik/.ssh/id_dsa
debug2: we did not send a packet, disable method
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferred: password
debug3: authmethod_is_enabled keyboard-interactive
debug1: Next authentication method: keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug2: input_userauth_info_req
debug2: input_userauth_info_req: num_prompts 1
Password:
debug3: packet_send2: adding 32 (len 14 padlen 18 extra_pad 64)

phenomii:/cygdrive/u:502: ssh -v -v -v jdeifik AT www DOT weasel DOT com
OpenSSH_5.1p1, OpenSSL 0.9.8k 25 Mar 2009
debug2: ssh_connect: needpriv 0
debug1: Connecting to www.weasel.com [208.97.189.139] port 22.

I had to use control-C to stop this, as it has been hanging at this 
point for 5 minutes.
jeff


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