Subject: Re: sshd problems
From: "John R Larsen" <[email-masked]>
To: giuseppe <[email-masked]>
Cc: [email-masked]
Date: Sat, 16 Apr 2005 10:22:05 -0400

From your data it appears that you can ssh to the localhost which means your sshd server is 
running.  However, you can't connect to your localhost from the Linux machine; the connection 
times out.  Your other examples all look like they are connections from the localhost to other 
machines, which all appear to work.

Is this a Windows XP machine with Service Pack 2 installed?  Have you opened up the firewall 
to allow port 22 through?  If not, that explains your problem.  Port 22 is blocked by default.

The firewall won't block ssh connections originating from your localhost to other machines.  
That would be consistent with the data you've shown.

John

On 16 Apr 2005 at 9:03, giuseppe wrote:

To:             	[email-masked]
From:           	giuseppe <[email-masked]>
Subject:        	Re: sshd problems
Date sent:      	Sat, 16 Apr 2005 09:03:35 +0000 (UTC)

[ Double-click this line for list subscription options ] 

dear john
thanks  a lot for your help;
i write you here some answers at your indications

- On the cygwin machine itself, can you "ssh localhost"?
If you can't do that then sshd still has a
- problem.  If you can connect to localhost that proves
that sshd is running okay on the cygwin 
- machine.
- 
yes, ssh localhost works fine,
(but isn't it working with loopback device 
instead of eth0??)

- If you use the -v option you will get 
debug information that can be of help. 
Use this command:
 
- ssh -v host_name
- 
- where "host_name" is the name of the machine.  
If you're trying to connect to the cygwin 
- machine the command would be:
- 
- ssh -v localhost
- 
- You'll see lots of debug information.
- 
- Once you can connect locally to the cygwin machine, 
then you 
can start 
solving
the problems 
- from the Linux box.

that's what happens from the cygwin machine

ssh -v localhost
OpenSSH_4.0p1, OpenSSL 0.9.7f 22 mar  2005
debug1: Reading configuration data /etc/ssh_config
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/identity type -1
debug1: identity file /home/user/.ssh/id_rsa type -1
debug1: identity file /home/user/.ssh/id_dsa type -1
debug1: Remote protocol version 1.99, remote software 
version OpenSSH_4.0
debug1: match: OpenSSH_4.0 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.0
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
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
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'localhost' is known and matches the 
RSA host key.
debug1: Found key in /home/user/.ssh/known_hosts:2
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,
password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /home/user/.ssh/identity
debug1: Trying private key: /home/user/.ssh/id_rsa
debug1: Trying private key: /home/user/.ssh/id_dsa
debug1: Next authentication method: keyboard-interactive
debug1: Authentications that can continue: publickey,
password,keyboard-interactive
debug1: Next authentication method: password
user@localhost's password:
debug1: Authentication succeeded (password).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
Last login: **************** from *************

that's what happens when I try ssh from 
linux machine (LM)  to the cygwin machine(CM)

ssh  -v user@ip_cgwin machine
OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to ip_cgwin machine 
[ip_cgwin machine] port 22.
debug1: connect to address ip_cgwin machine port 22: 
Connection timed out
ssh: connect to host ip_cgwin machine port 22: 
Connection timed out

I also add the ssh from the CM to ip_CM

ssh -v ip_cgwin machine
OpenSSH_4.0p1, OpenSSL 0.9.7f 22 mar  2005
debug1: Reading configuration data /etc/ssh_config
debug1: Connecting to ip_cgwin machine [ip_cgwin machine] 
port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/identity type -1
debug1: identity file /home/user/.ssh/id_rsa type -1
debug1: identity file /home/user/.ssh/id_dsa type -1
debug1: Remote protocol version 1.99, remote software 
version OpenSSH_4.0
debug1: match: OpenSSH_4.0 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.0
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
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
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'ip_cygwin_machine' is known and matches 
the RSA host key.
debug1: Found key in /home/user/.ssh/known_hosts:3
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,
password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /home/user/.ssh/identity
debug1: Trying private key: /home/user/.ssh/id_rsa
debug1: Trying private key: /home/user/.ssh/id_dsa
debug1: Next authentication method: 
keyboard-interactive
debug1: Authentications that can continue: publickey,
password,keyboard-interactive
debug1: Next authentication method: password
user@ip_cygwin_machine password:
debug1: Authentication succeeded (password).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
Last login: **************** from *************

I also add the ssh from the CM to LM:

ssh -v ip_LM
OpenSSH_4.0p1, OpenSSL 0.9.7f 22 mar  2005
debug1: Reading configuration data /etc/ssh_config
debug1: Connecting to ip_LM [ip_LM] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/identity type -1
debug1: identity file /home/user/.ssh/id_rsa type -1
debug1: identity file /home/user/.ssh/id_dsa type -1
debug1: Remote protocol version 1.99, remote software 
version OpenSSH_3.9p1
debug1: match: OpenSSH_3.9p1 pat OpenSSH_3.*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.0
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
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
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'ip_LM' is known and matches the RSA 
host key.
debug1: Found key in /home/user/.ssh/known_hosts:4
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,
gssapi-with-mic,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/user/.ssh/identity
debug1: Trying private key: /home/user/.ssh/id_rsa
debug1: Trying private key: /home/user/.ssh/id_dsa
debug1: Next authentication method: password
*****@ip_LM password:
debug1: Authentication succeeded (password).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
Last login: **************** from *************

what do you think? 
why ssh does not work fine as server on CM?
ssh works fine on LM both as client that as server  
(I proved it several times with other LM).
other LM can't connect to CM via ssh too.
Of course i can give other information if you need it.
thans again
best regards

giuseppe

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_______________________________________________________
John R Larsen <[email-masked]>
http://larsen-family.us

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